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PLoS One 2020 2;15(7):e0235556. Epub 2020 Jul 2.

Department of Biology, Garmsar Branch, Islamic Azad University, Garmsar, Iran.

To gain a better insight into the selenium nanoparticle (nSe) benefits/toxicity, this experiment was carried out to address the behavior of bitter melon seedlings to nSe (0, 1, 4, 10, 30, and 50 mgL-1) or bulk form (selenate). Low doses of nSe increased biomass accumulation, while concentrations of 10 mgL-1 and above were associated with stem bending, impaired root meristem, and severe toxicity. Responses to nSe were distinct from that of bulk in that the nano-type exhibited a higher efficiency to stimulate growth and organogenesis than the bulk. Read More

Environ Sci Technol 2020 Jun 29. Epub 2020 Jun 29.

Ammonia (NH4+) and hydrogen peroxide (H2O2) have been widely used to inhibit bromate formation during ozonation. However, organic byproducts can also pose a risk under these conditions. During bromate inhibition, the influence of NH4+ and H2O2 on organic byproducts and their toxicity should be elucidated. Read More

J Hazard Mater 2020 Jun 13;400:123117. Epub 2020 Jun 13.

School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China.

Coking wastewater (CWW) containing complicated organic compositions and strong toxicity cause potential hazards to natural water bodies as well as human health. The aim of this study was integrating newly isolated Comamonas sp. ZF-3, biofilm-based bioaugmentation and fluidized bed reactor into an anoxic filter-fluidized bed reactor (AF-FBR) system to treat actual CWW. Read More

Biomed Res Int 2020 25;2020:1705387. Epub 2020 May 25.

Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.

As one of the main environmental stressors commonly found in closed pig houses, ammonia poses high risks to the well-being of humans and animals. This study is aimed at assessing the toxicity of ammonia exposure (80 ppm for 12 days) on the nasal mucosa in piglets. Firstly, we found that after ammonia exposure, the number of white blood cells significantly increased and the serum levels of cytokine IL-4 were significantly decreased. Read More

Anim Nutr 2020 Jun 10;6(2):217-224. Epub 2020 Apr 10.

Department of Veterinary Science, University of Kentucky, Lexington, KY, 40356, United States.

Fertile chicken eggs were used as an alternative model for large animals to evaluate suspect toxic dietary ingredients for fetal loss disorders associated with mare reproductive loss syndrome (MRLS) and fetal losses in other livestock. Nitrate, ammonia, and sulfate may react with proteinaceous compounds to enable the formation of abiotic pathogenic nanoparticles which were constant findings in pathognomonic placental lesions associated with non-infectious fetal losses of previously unknown etiology in mares, chickens and other livestock. The pathogenic nanoparticles may be produced naturally by toxic elements associated with air pollution that affect pasture forages or crops, unintentionally by reactions of these elements in protein-mineral mixes in dietary rations, or endogenously within tissues of fetuses and adult animals. Read More

Environ Toxicol Chem 2020 Jun 15. Epub 2020 Jun 15.

Naval Information Warfare Center (NIWC) Pacific, 53475 Strothe Rd., San Diego, CA, 92152.

Human-dominated waterways contain thousands of chemicals. Determining which chemical is the most important stressor is important, yet very challenging. The U. Read More

Sci Total Environ 2020 Aug 15;729:138702. Epub 2020 Apr 15.

Department of Civil and Environmental Engineering, University of California at Davis, 1 Shields Avenue, Davis, CA 95616, United States of America. Electronic address:

Biogas is a renewable energy fuel that can be treated to increase purity so that the resulting "biomethane" can be injected into the natural gas pipeline grid. The trace contaminants in biogas and biomethane make up a small fraction of the total gas but they still have the potential to cause adverse health effects and pipeline corrosion. This study investigates the statistical distributions of 17 trace metals, six mercaptans, hydrogen sulfide, ammonia, and six additional trace organic compounds. Read More

Mater Sci Eng C Mater Biol Appl 2020 Aug 26;113:111012. Epub 2020 Apr 26.

State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, 381Wushan Road, Tianhe District, Guangzhou 510640, China. Electronic address:

Silver nanoparticles (AgNPs) have been widely used for sterilization due to their broad-spectrum bactericidal properties. However, there exist the problems of premature releasing and accumulative toxicity when free AgNPs are applied. This study proposed a one-pot hydrothermal strategy to synthesize carbon spheres immobilized silver nanoparticles (AgNPs@CS). Read More

Crit Rev Toxicol 2020 Mar;50(3):219-271

Department of Sustainable Health, Umeå University, Umeå, Sweden.

Inorganic chloramines are not commercially available, but monochloramine is produced for disinfection or for use in chemical synthesis. Inorganic chloramines are also formed when free chlorine reacts with nitrogen containing substances, e.g. Read More

Environ Geochem Health 2020 May 17. Epub 2020 May 17.

State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China.

Heavy metal pollution is a serious problem in wetland ecosystems, and the toxicity of heavy metals affects microorganisms, thus influencing the biogeochemical process of nitrogen (N). To investigate the effects of heavy metal cadmium (Cd) pollution on N mineralization in urban constructed wetland soils of the Pearl River Delta, a 40-day aerobic incubation experiment was conducted under three Cd addition treatments [no Cd addition (control), low Cd addition (LCA) and high Cd addition (HCA)]. The results showed that compared with the control, the LCA treatment enhanced the soil N mineralization rate (R), while the HCA treatment inhibited R, with the average R values in the control treatment of 0. Read More

Sci Total Environ 2020 Aug 3;730:139171. Epub 2020 May 3.

Department of Civil and Environmental Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA; Department of Energy, Environmental and Chemical Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA. Electronic address:

Membrane electrochemical reactor (MER) is an effective treatment system to remove recalcitrant compounds in landfill leachate but harmful byproducts can be formed during the treatment. Herein, we have investigated the formation of total halogenated organics and the associated toxicity as a side effect of leachate treatment by the MER. Those byproducts are represented by the term "disinfection byproducts, or DBPs", because of the similar formation mechanisms. Read More

Sci Total Environ 2020 Aug 26;729:139017. Epub 2020 Apr 26.

College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China. Electronic address:

Ammonia, a kind of gas with pungent smell, is harmful to livestock and people, and has bad influence on the atmosphere. However, the mechanism of splenic toxicity caused by ammonia is still poorly understood. The aim of present study was to investigate the effect of ammonia on chicken splenic lymphocytes from the perspective of apoptosis. Read More

Process Saf Environ Prot 2020 May 5. Epub 2020 May 5.

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang Province,150090, PR China.

Landfill leachate poses significant risks to public health via the release of high-toxicity contaminants, including refractory organic compounds, ammonia-nitrogen compounds, and heavy metals. Significant efforts have been made to develop useful methods for leachate disposition and treatment. Advanced oxidation processes (AOPs) are one of the most promising methods, because they can rapidly degrade diverse pollutants and significantly improve the biodegradability of leachate. Read More

Ecotoxicol Environ Saf 2020 Apr 25;198:110619. Epub 2020 Apr 25.

College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, China. Electronic address:

Ammonia (NH), an environmental pollutant with a pungent odor, is not only an important volatile in fertilizer production and ranching, but also main basic component of haze. In present study, we found that ultrastructural changes and 3167 differentially expressed proteins (DEPs) using proteomics analysis in the thymuses of chickens exposed to NH on day 42. Obtained DEPs were enriched using GO and KEGG; and 66 DEPs took part in immune function, metabolic process, and apoptosis in the thymuses of chickens treated with NH. Read More

J Hazard Mater 2020 Apr 18;396:122605. Epub 2020 Apr 18.

College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China; Key Laboratory of the Provincial Education Department of Heilongjiang for Common Animal Disease Prevention and Treatment, College of Veterinary Medicine, Northeast Agricultural University, Harbin, 150030, PR China. Electronic address:

Ammonia (NH), as a harmful gas from agricultural production, plays an important role in air pollution, such as haze. Although numerous researchers have paid attention to health damage through NH inhalation, the exhaustive mechanism of NH induced intestinal toxicity remains unclear. A genes crosstalk named competing endogenous RNAs (ceRNA) can explain many regulatory manners from the molecular perspective. Read More

J Anim Physiol Anim Nutr (Berl) 2020 Apr 25. Epub 2020 Apr 25.

School of Environmental and Rural Science, University of New England, Armidale, NSW, Australia.

Nitrate ( ) supplementation is an effective methane (CH ) mitigation strategy for ruminants but may produce nitrite ( ) toxicity. It has been reported that rumen protozoa have greater ability for and reduction than bacteria. It was hypothesised that the absence of ruminal protozoa in sheep may lead to higher accumulation in the rumen and a higher blood methaemoglobin (MetHb) concentration. Read More

Fish Shellfish Immunol 2020 Jul 21;102:195-202. Epub 2020 Apr 21.

School of Marine Sciences, Ningbo University, Ningbo, 315211, China. Electronic address:

Ammonia is toxic to fishes. Different fish have different defense strategies against ammonia, so the mechanism of ammonia poisoning is different. In this study, yellow catfish were exposed to three levels of ammonia (0, 5. Read More

Environ Res 2020 Apr 14;186:109522. Epub 2020 Apr 14.

Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, 518055, PR China. Electronic address:

Polycyclic aromatic hydrocarbons (PAHs) are regarded as priority pollutants owing to their toxic, mutagenic and carcinogenic characteristics. Perylene is a kind of 5-ring PAH with biological toxicity, and classified as a class III carcinogen by the World Health Organization (WHO). Nowadays, some of its derivatives are often used as industrial pigments. Read More

Water Environ Res 2020 Apr 22. Epub 2020 Apr 22.

State Key Laboratory of Urban Water Resources and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, China.

A FLUENT software able to predict and assess the electrooxidation of ammonia from the simulation of ammonia concentration and flow field distribution was developed in this study. The flow field-based models of ammonia removal were simulated and modified through the experimental results. The parameter of reaction constant k is corrected to 0. Read More

Life Sci 2020 Jul 18;253:117684. Epub 2020 Apr 18.

Department of Pharmacy, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan. Electronic address:

Brain oxidative stress and neuroinflammation have been implicated in various psychiatric disorders. The current study investigated the effect and mechanism of 25-Methoxyhispidol A (25-MHA) against CCl-induced anxiety and depression. Mice were challenged with CCl (1 ml/kg; i. Read More

Sci Total Environ 2020 Jul 13;726:138686. Epub 2020 Apr 13.

College of Veterinary Medicine, Northeast Agricultural University, Harbin 150030, PR China. Electronic address:

Ammonia (NH) is an environmental contaminant that is causing increasing problems with human and animal health due to the development of poultry industry. There are limited studies on the effect of NH inhalation toxicity on the intestinal tract of animals, and underlying molecular mechanisms remain unclear. In the present study, we established a chicken model of NH aspiration-induced injury for 42 days and observed histopathological changes of the jejunum. Read More

Ecotoxicology 2020 May 14;29(4):429-443. Epub 2020 Apr 14.

Opole University of Technology, Prószkowska 76 Street, Opole, 45-758, Poland.

The study assesses the contamination, classification and phytotoxicity of foundry waste. The presented results are a part of the research on the agrotechnical use of foundry waste. Landfilled foundry waste (LFW) and dust samples were taken from one of the Polish foundries. Read More

Fish Shellfish Immunol 2020 Jun 3;101:198-204. Epub 2020 Apr 3.

Key Laboratory of Molecular Epigenetics of the Ministry of Education (MOE), Northeast Normal University, Changchun, 130024, China.

Ammonia is toxic to most bony fishes. However, little information is available on the toxicology mechanisms induced by ammonia and the means to mitigate the effects by various fishes. In this study, four groups of experiments were designed and carried out to test the response of dolly varden char to ammonia toxicity and their mitigation through methionine sulfoximine (MSO). Read More

Environ Res 2020 Jun 16;185:109403. Epub 2020 Mar 16.

State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. Electronic address:

An electrostimulated anaerobic-oxic integrated system was constructed for treating alizarin yellow R (AYR) containing wastewater. In electro-stimulated anaerobic unit, AYR decolorization efficiency improved from 51.2% to 96. Read More

Nutrients 2020 Mar 22;12(3). Epub 2020 Mar 22.

Department of Physiology, Faculty of Medicine in Hradec Králové, Charles University, Šimkova 870, 500 38 Hradec Kralove, Czech Republic.

L-histidine (HIS) is an essential amino acid with unique roles in proton buffering, metal ion chelation, scavenging of reactive oxygen and nitrogen species, erythropoiesis, and the histaminergic system. Several HIS-rich proteins (e.g. Read More

Ecotoxicol Environ Saf 2020 Jun 25;195:110524. Epub 2020 Mar 25.

Universidade Estadual Paulista (UNESP), Faculdade de Engenharia, Ilha Solteira, São Paulo, Brazil. Electronic address:

Since the ecosystem is contaminated by lead, decontamination is a difficult and expensive process. Therefore, an alternative would be the use of phytoremediation plants, which have been studied more intensely in recent decades. Astronium graveolens Jacq (Anacardiaceae) is a Cerrado native species and plants of this biome are known to present adaptations and modifications that keep them in this ecosystem. Read More

Environ Pollut 2020 Jun 21;261:114230. Epub 2020 Feb 21.

MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, 310058, China. Electronic address:

Polyphenols, pivotal secondary metabolites, are involved in plant adaption to abiotic stresses. Here, we investigated the role and metabolism profile of polyphenols under aluminum (Al) stress in different lettuce genotypes grown in 0.5 mM CaCl solution with AlCl (pH = 4. Read More

Environ Pollut 2020 Aug 18;263(Pt A):114412. Epub 2020 Mar 18.

Yellow River Engineering Consulting Co., Ltd., Zhengzhou, 450003, PR China.

In this study, the tips of Myriophyllum aquaticum (M. aquaticum) plants were planted in open-top plastic bins and treated by simulated wastewater with various ammonium-N concentrations for three weeks. The contents of related carbohydrates and key enzyme activities of carbon metabolism were measured, and the mechanisms of carbon metabolism regulation of the ammonia tolerant plant M. Read More

Brain Sci 2020 Mar 24;10(3). Epub 2020 Mar 24.

Department of Psychiatry, Taipei Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, New Taipei City 231, Taiwan.

Valproic acid (VPA) is widely used to control various seizure disorders and psychiatric disorders. Valproic acid-induced hyperammonemic encephalopathy (VHE) is a rare but dangerous complication of VPA-induced toxicity. For this case report, several risk factors were identified, including young age, polytherapy regimens, VPA overdose, poor liver function, and carnitine deficiency. Read More

Environ Res 2020 May 16;184:109392. Epub 2020 Mar 16.

Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Institute for Marine Science and Technology, Shandong University, Qingdao, 266237, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China.

The accelerated development and application of graphene-family nanomaterials (GFNs) have increased their release to various environments and converged in wastewater treatment plants (WWTPs). However, little is known about the interactions between GFNs and microbes in WWTPs. In this study, the interaction of graphene oxide (GO) or graphene (G) at different concentrations with microbial communities in sequential batch reactors was investigated. Read More

J Spec Oper Med 2020 ;20(1):55-59

Purpose: This study investigated the decontamination effectiveness of selected toxic industrial chemicals using RSDL® (Reactive Skin Decontamination Lotion Kit; Emergent BioSolutions Inc.; https://www.rsdl. Read More

Pharmacol Biochem Behav 2020 05 19;192:172912. Epub 2020 Mar 19.

Department of Pharmacology & Experimental Therapeutics, College of Pharmacology and Pharmacological Science, University of Toledo, OH, USA. Electronic address:

Rationale: Methylenedioxymethamphetamine (MDMA) and methcathinone (MCAT) are abused psychostimulant drugs that produce adverse effects in human users that include hepatotoxicity and death. Recent work has suggested a connection between hepatotoxicity, elevations in plasma ammonia, and brain glutamate function for methamphetamine (METH)-induced neurotoxicity.

Objectives: These experiments investigated the effect of ambient temperature on the toxicity and lethality produced by MDMA and MCAT in mice, and whether these effects might involve similar mechanisms to those described for METH neurotoxicity. Read More

Front Plant Sci 2019 28;10:1696. Epub 2020 Feb 28.

EuroChem Agro, Mannheim, Germany.

Organic pot-based production of basil ( L.) often has lower biomass yield than conventional cultivation. Previous investigations indicate that this growth impairment is related to high ammonium (NH) concentrations in the growing media released by the mineralization of organic nitrogen (N) fertilizers. Read More

Chemosphere 2020 Jul 28;251:126379. Epub 2020 Feb 28.

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China.

Ammonia is one of the two mandatory indexes for China's water environment pollution control. The current China ammonia water quality standard does not reflect the effect of water quality parameters on ammonia toxicity. The Ministry of Ecology and Environment of China just released the China National Aquatic Life Criteria Report for ammonia. Read More

PLoS One 2020 4;15(3):e0229764. Epub 2020 Mar 4.

Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, Jining, Shandong Province, China.

Background: To investigate mosquito larval habitats and resistance to common insecticides in areas with high incidence rates of mosquito-borne diseases in Jining, Shandong Province, and to provide a scientific basis for the future prevention and control of mosquito-borne diseases and the rational use of insecticides.

Methods And Results: From June to September 2018, mosquito habitat characteristics and species compositions in Jintun town were studied through a cross-sectional survey. Larvae and pupae were collected in different habitats using the standard dipping technique. Read More

J Am Assoc Lab Anim Sci 2020 May 28;59(3):288-297. Epub 2020 Feb 28.

Refinement and Enrichment Advancements Laboratory (REAL), University of Michigan, Ann Arbor, Michigan;, Email:

According to the , cage change frequencies must be considered when cage density requirements are exceeded. We monitored ammonia, carbon dioxide, cage wetness, health status, and breeding parameters of trio and pair breeding cages containing CD1 mice in ventilated and static microisolation caging (4 cages per condition) daily for approximately 6 wk. Minimum cage change frequencies for each condition were determined on the basis of performance data. Read More

Chemosphere 2020 Jul 20;250:126272. Epub 2020 Feb 20.

Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1a, 52074, Aachen, Germany; Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, School of Environment and Energy, South China University of Technology, 510006, Guangzhou, China; National Engineering Laboratory for VOCs Pollution Control Technology and Equipment, 510006, Guangzhou, China. Electronic address:

Reduction of harmful nitrogen oxides (NO) from diesel engine exhausts is one of the key challenges in environmental protection, and can be achieved by NH-assisted selective catalytic reduction (NH-SCR) using copper-exchanged chabazite zeolites (i.e. Cu-CHA, including Cu-SSZ-13 and Cu-SAPO-34) as catalysts. Read More

Anal Chim Acta 2020 Apr 8;1104:60-68. Epub 2020 Jan 8.

Institute of Life Science, And Laboratory of Tissue and Cell Biology, Lab Teaching & Management Center, Chongqing Medical University, Chongqing, 400016, China. Electronic address:

Copper is an attractive candidate for sensing ammonia. Here, an electrodissolution mechanism for measuring liquid-phase ammonia was developed via a novel three-dimensional rosette-like structure of copper nanoparticles (CuNPs) integrated onto carbon cloth (CuNPs/CC). A one-step hydrothermal synthetic procedure was employed to construct the metallic CuNPs with a stereo rosette-like pattern on flexible CC substrate. Read More

Fish Shellfish Immunol 2020 Apr 22;99:514-525. Epub 2020 Feb 22.

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China. Electronic address:

Ammonia is one of the major pollutants associated with the main river basins due to ammonification of uneaten food and animal excretion, which usually brings detrimental health effects to aquatic invertebrate. However, the mechanisms of ammonia toxicity in aquatic invertebrate have rarely been reported. In this study, C. Read More

Bioresour Technol 2020 May 12;304:123005. Epub 2020 Feb 12.

The State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 200092 Shanghai, PR China.

Petrochemical wastewaters treatment represents a serious challenge due to the high toxicity and complex chemical components. In this study, the biodegradability, mineralization behaviors and methane productivity of eight different types of petrochemical wastewaters were evaluated in series of semi-continuous bioreactors. Methane production strongly depended on the characteristics of wastewaters and chemical constituents. Read More

Bull Environ Contam Toxicol 2020 Mar 7;104(3):321-326. Epub 2020 Feb 7.

Columbia Environmental Research Center, U.S. Geological Survey, 4200 E. New Haven Rd, Columbia, MO, 65201, USA.

Guidelines for developing water quality standards allow U.S. states to exclude toxicity data for the family Salmonidae (trout and salmon) when deriving guidelines for warm-water habitats. Read More

Environ Monit Assess 2020 Feb 4;192(3):161. Epub 2020 Feb 4.

Environmental Microbiology Lab., Water Pollution Research Department, National Research Centre, Dokki, Giza, 12622, Egypt.

This study was aimed to biologically treat domestic wastewater using identified bacterial consortium for chemical pollutants removal by treating/passing it through sand biofilters. The identification, toxicity test, and the optimum dose of the investigated bacterial consortium were carried out using Microtox analyzer and Batch biological treatment, respectively. Furthermore, application of sedimentation followed by gravel and sand biofilters for wastewater treatment was evaluated. Read More

MMWR Morb Mortal Wkly Rep 2020 Jan 31;69(4):109-113. Epub 2020 Jan 31.

On April 25, 2019, a farm tractor towing two 2-ton ammonia tanks on a county road in Lake County, Illinois, experienced a mechanical failure that resulted in the release of anhydrous ammonia, a colorless, pungent, irritating gas that can cause severe respiratory and ocular damage (1). Approximately 80% of anhydrous ammonia produced in the United States is used as a fertilizer in agriculture (1). Eighty-three persons, including first responders, motorists, and neighborhood residents, were evaluated at area hospitals because of exposure to the gas. Read More

Chemosphere 2020 Mar 20;243:125399. Epub 2019 Nov 20.

Department of Civil, Environmental, Construction Engineering Department, University of Central Florida, Orlando, FL, USA. Electronic address:

Nutrient removal efficiency in green sorption media such as biosorption activated media (BAM) for treating stormwater runoff can be heavily influenced either on a short- or long-term basis by varying field conditions of linear ditches due to the presence of copper in stormwater runoff. It is also noticeable that the linear ditch undergoes physical or mechanical impacts from the traffic compaction, chemical impact of carbon sources from the nearby farmland, and biological impact from potential animal activities (such as gopher tortoises, moles, and ants). In the nitrogen cycle, two denitrification pathways, the dissimilatory nitrate reduction to ammonia and common denitrification, are deemed critical for such assessment. Read More

Talanta 2020 Apr 20;210:120653. Epub 2019 Dec 20.

Institute of Environmental Science, and School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan, 030006, China. Electronic address:

In this work, nitrogen-doped carbon dots (N-CDs) were successfully utilized as a photoluminescent platform for multi-mode sensing of chromium(VI) [Cr(VI)], 2,4,6-trinitrophenol (TNP) and ascorbic acid (AA). The N-CDs with green fluorescent emission were synthesized via one-pot method using p-phenylenediamine and ammonia as precursors. The structure and optical properties were characterized by Fourier transform infrared spectroscopy, ultraviolet visible spectroscopy and fluorescence spectroscopy, respectively. Read More

Water Res 2020 Apr 16;172:115508. Epub 2020 Jan 16.

Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (ChEE), University of Cincinnati, Cincinnati, OH, 45221-0012, USA.

In this study, the potential formation of trichloronitromethane (TCNM) from model organic compounds in ammonia-containing water treated by UV/chlorine process was evaluated. Monochloramine generated from the reaction of chlorine and ammonia can be photolyzed to produce NO and reactive nitrogen species (RNS), which play important roles in the formation of TCNM during the subsequent chlorination. The results showed that increase of nitrogen to chlorine molar ratio (from 0 to 1. Read More

Environ Sci Technol 2020 03 10;54(5):3032-3038. Epub 2020 Feb 10.

Guangdong Engineering Technology Research Center of Water Security Regulation and Control for Southern China, Key Laboratory of Water Cycle and Water Security in Southern China of Guangdong Higher Education Institute, School of Civil Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China.

Recycling wastewater from animal production for fertilizers using anaerobic digestion (AD) is a common method to recover the nutrients in the digestate. However, the digestate toxicity is not well understood because AD is mainly designed for chemical oxygen demand reduction. This study determined the toxicity during AD and the controlling factors with the goal to improve digestate safety during farmer handling to reuse the nutrients. Read More

Environ Sci Pollut Res Int 2020 Apr 22;27(11):11596-11607. Epub 2020 Jan 22.

College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, People's Republic of China.

Ammonia (NH) is a toxic, environmental pollutant, and irritant gas. Previous studies reported the toxic effects of NH which led to inflammation in various organs of chicken. However, the exact mechanism of NH-induced inflammation in chicken lymphoid organs bursa of fabricius (BF) and thymus is still elusive. Read More

Sci Total Environ 2020 Apr 17;713:136145. Epub 2019 Dec 17.

Department of Environmental Engineering (DEA), Federal University of Bahia (UFBA), Aristides Novis Street 2, 4° floor, Federação, 40210-630 Salvador, Bahia, Brazil; Clean Technologies Network (TECLIM), Federal University of Bahia (UFBA), Aristides Novis Street 2, 4° floor, Federação, 40210-630 Salvador, Bahia, Brazil. Electronic address:

This manuscript aimed to identify the energy demand, and environmental aspects and impacts of crop fertilisation with human urine when compared to using mineral fertilisers. The Material Flow Analysis and Life Cycle Assessment methods were adopted covering the options from "cradle to grave". The fertilisation with human urine included the collection, storage, transportation, application and field emissions, while the fertilisation with mineral fertilisers included primary production of fertilisers, transportation, application and field emissions. Read More

Chemosphere 2020 May 13;247:125903. Epub 2020 Jan 13.

State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. Electronic address:

The partial nitrification efficiency response to the presence of cadmium (Cd) and microplastics was investigated. Microplastics polyvinylchloride (PVC) abundance was 0-10,000 particles/L, and Cd concentration was 0-10 mg/L. Cd-only inhibited the NH-N oxidation rate 1. Read More