Publications by authors named "Mohammad Hossein Salmani"

11 Publications

  • Page 1 of 1

Dielectric barrier discharge plasma with photocatalysts as a hybrid emerging technology for degradation of synthetic organic compounds in aqueous environments: A critical review.

Chemosphere 2021 Jan 23;263:128065. Epub 2020 Aug 23.

Research Center of Prevention and Epidemiology of Non-Communicable Disease, Department of Biostatistics and Epidemiology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

Dielectric barrier discharge (DBD) plasma has been recently used for removal of synthetic organic compounds (SOCs) from aqueous environments. The removal of SOCs by alone DBD is significantly limited by its high electricity needs and inefficient mineralization, which affects the further application of DBD for SOCs. The combined application of DBD with other technologies and the addition of a supplementary substance for energy-saving were proposed to resolve these problems. The addition of catalysts is considered to be a promising and innovative approach to increase the energy yield of DBD, improve the environment friendly of DBD, develop the variety of goal SOCs, and improve the removal efficiency of DBD system. Despite the increasing use of the coupling form of DBD and catalysts, as catalytic dielectric barrier discharge (CDBD), but it still requires a comprehensive review to summarize the last studies and highlight the future perspectives in this area. Therefore, this work is the first literature review aimed to critically assess the latest developments of catalysts coupling with DBD employed in aqueous environments. Moreover, performance evaluation, energy yield, toxicity, eco-friendly, and future perspectives of the CDBD systems for SOCs removal were discussed and overviewed. The results showed that the coupling of catalysts with DBD presents synergistic effects and had excellent removal performance for aqueous SOCs. Overall, it can be concluded that the essential principles of environmental and economic sustainability have been addressed for the removal of persistent pollutants from aqueous environments in the CDBD systems.
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http://dx.doi.org/10.1016/j.chemosphere.2020.128065DOI Listing
January 2021

Monitoring of Essential and Toxic Elements in Leaves, Branches, and Stem of Prosopis cineraria (as Anti-Inflammatory) Growing in Iran.

Biol Trace Elem Res 2020 Dec 24;198(2):714-720. Epub 2020 Mar 24.

Department of Dermatology, Shahid Sadoughi University of Medical Sciences, Yazd, IR, Iran.

Prosopis cineraria is locally grown which scientific literature present evidence for its anti-inflammatory effect. Monitoring the content of toxic elements is one of the most important aspects to consider medicinal plants' safety before evaluating the pharmaceutical use. The aim of present study was to investigate the level of essential and toxic elements in the leaves, branches, and stem of Prosopis cineraria to assess its health risk. Samples were collected around Bandar Abbas, washed several times, and dried in air for 2 weeks. The dried samples were chopped with stainless steel knife to small pieces and powdered by electrical mortar. Some physical and chemical properties of samples were investigated by chemical methods. Samples were ashed by a programmable electric furnace at 650 °C for 6 h. Then samples were dissolved in 30% HNO, and the content elements of each sample were determined by inductive coupled plasma optical emission spectrometer (ICP-OES). The tests quality control and the measurement uncertainty were checked through the analysis of certified reference materials of SRM 1515 from NIST and solution standards. Correlation analysis of the obtained results showed a significant difference between leaves, branches, and stem of Prosopis cineraria so that the stem had the high essential and low toxic elements ones in comparison to other parts. The results revealed that the Prosopis cineraria stem is meeting health standards regarding the studied toxic metals.
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http://dx.doi.org/10.1007/s12011-020-02103-0DOI Listing
December 2020

Evaluation of heavy metal concentration in imported black tea in Iran and consumer risk assessments.

Food Sci Nutr 2019 Dec 17;7(12):4021-4026. Epub 2019 Nov 17.

Zoonotic Diseases Research Center Department of Food Hygiene and Safety School of Public Health Shahid Sadoughi University of Medical Sciences Yazd Iran.

Tea grows in the contaminated soils, absorbs the heavy metals, and enters them into the human food chain. The concentrations of Pb, Cd, Cu, As, and Hg of the imported black tea leaves to Hormozgan Province were evaluated by atomic absorption spectrometer. Then, the Hazard Quotient (HQ) and Hazard Index (HI) levels of heavy metal intakes were calculated to estimate the health hazard for consumers. The Pb, Cd, Cu, As, and Hg concentrations in the Sri Lankan and Indian blank tea were 0.14, 0.017, 11.29, 0.057, 0.0076 mg/kg, and 0.21, 0.02, 14.56, 0.067, 0.01 mg/kg, respectively. It was found that except for As concentration in Indian black tea were higher than Sri Lankan black tea. The HQ and HI levels of all studied metals were less than one, but they were higher in Indian black tea compared with the Sri Lankan black tea. The HI of Indian and Sri Lankan black tea samples were 0.061 and 0.048, respectively, which indicated no significant health hazard for tea consumers. The results showed that the consumption of the studied tea could not have any risk of heavy metal exposure.
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http://dx.doi.org/10.1002/fsn3.1267DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6924297PMC
December 2019

Designing and modeling of a novel electrolysis reactor using porous cathode to produce HO as an oxidant.

MethodsX 2019 1;6:1305-1312. Epub 2019 Jun 1.

Department of Pharmaceutics, Faculty of Pharmacy, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

The entry of toxic organic pollutants and resistant to biodegradation has increased the concern about human health. The use of advanced oxidation (AO) processes to degrade these pollutants has been developing. One of the AO processes is based on the use of hydrogen peroxide in removing resistant organic pollutants. This study aimed to develop a new reactor capable of producing HO in the solution. Therefore, a porous electrode made of stainless steel with the capability of air injection in the electrode center was used. The 30 cm rod graphite electrodes were also used as an anode electrode in a 4000 ml reactor. The effects of variables, including current density (30-40 mA/cm), time (10-30 min), and electrolyte concentration (12-17 mM/L) on the amount of HO production were evaluated by design under response surface methodology using software. The results of this study showed that HO can be produced at the electrode surface of porous cathode under optimal conditions of 36 mA/cm current density, 16 mM/l electrolyte concentration, in 23 min, and in the amount of 34 ppm. Using a porous cathode electrode causes the maximum contact among the solution, water, and air, and increases the production of HO. The release of resistant organic compounds to the waste water is a serious problem to the environment. By the application of the (EO)reactor with the ability to produce HO, this issue is resolved. Furthermore, this technique is applied for non-selective degradation of the toxic organic compounds. •The electro-oxidation process is a useful method for destruction of persistent organic matter from wastewater.•Due to use of porous cathode in this method, contact between the electrode and the sewage is at its maximum level which increases the efficiency and speed of sewage treatment.•This method can produce HO as a high potential oxidant that can reduce persistent organic properties of sewage and make the wastewater suitable for biological treatment.
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http://dx.doi.org/10.1016/j.mex.2019.05.036DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6558086PMC
June 2019

Optimization and economic evaluation of modified coagulation-flocculation process for enhanced treatment of ceramic-tile industry wastewater.

AMB Express 2018 Oct 17;8(1):172. Epub 2018 Oct 17.

Environmental Science and Technology Research Center, Department of Management of Health Services, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

Enhanced treatment of ceramic-tile industry wastewater was investigated by modified coagulation-flocculation process using combination of poly-aluminum chloride (PAC) with anionic (A), cationic polymer (C) and nonionic polymers. The effects of pH, PAC coagulant dose alone and with polymers dose in various combinations was studied by jar tests. To compare the removal efficiencies of turbidity, total suspended solids (TSS), chemical oxygen demand (COD), and color at different levels, we run multivariate analysis of variance. Regarding the economic evaluation, we applied the incremental cost-effectiveness ratio. PAC had the best performance in pH 7 and in optimal dose of 400 mg/L; so that removal efficiency of wastewater turbidity, TSS, COD and color were 99.63%, 99.7%, 47.5% and 50.38%, respectively. The best removal efficiency for wastewater turbidity, TSS, COD and color were 99.87%, 99.89%, 87.5% and 93.02%, respectively which were obtained by combination of anionic polymer (1.5 mg/L) with PAC (300 mg/L). Furthermore, with combination of PAC + anionic + non-ionic polymers, the removal efficiency for wastewater turbidity, TSS, COD and color were 99.93%, 99.94%, 88% and 94.57%, respectively. The imposed cost for treating one cubic meter of ceramic-tile wastewater treatment by PAC + anionic and PAC + anionic and non-ionic polymers in comparison with PAC alone was reduced to 22.96% and therefore economically more affordable for the tile industry wastewater treatment.
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http://dx.doi.org/10.1186/s13568-018-0702-4DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6192943PMC
October 2018

Efficient photocatalytic oxidation of arsenite from contaminated water by FeO-MnO nanocomposite under UVA radiation and process optimization with experimental design.

Chemosphere 2018 Sep 18;207:303-312. Epub 2018 May 18.

Department of Biostatistics and Epidemiology, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Electronic address:

The efficiency of photocatalytic oxidation process in arsenite (As(III)) removal from contaminated water by a new FeO-MnO nanocomposite under UV radiation was investigated. The effect of nanocomposite dosage, pH and initial As(III) concentration on the photocatalytic oxidation of As(III) were studied by experimental design. The synthesized nanocomposite had a uniform and spherical morphological structure and contained 49.83% of FeO and 29.36% of MnO. Based on the experimental design model, in photocatalytic oxidation process, the effect of pH was higher than other parameters. At nanocomposite concentrations of more than 12 mg L, pH 4 to 6 and oxidation time of 30 min, photocatalytic oxidation efficiency was more than 95% for initial As(III) concentration of less than 500 μg L. By decreasing pH and increasing the nanocomposite concentration, the photocatalytic oxidation efficiency was increased. Furthermore, by increasing the oxidation time from 10 to 240 min, in addition to oxidation of As(III) to arsenate (As(V)), the residual As(V) was adsorbed on the FeO-MnO nanocomposite and total As concentration was decreased. Therefore, FeO-MnO nanocomposite as a bimetal oxide, at low doses and short time, can enhance and improve the efficiency of the photocatalytic oxidation and adsorption of As(III) from contaminated water resources. Furthermore, the energy and material costs of the UV/FeO-MnO system for photocatalytic oxidation of 1  mg L As(III) in the 1 L laboratory scale reactor was 0.0051 €.
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http://dx.doi.org/10.1016/j.chemosphere.2018.05.106DOI Listing
September 2018

Modification of pomegranate waste with iron ions a green composite for removal of Pb from aqueous solution: equilibrium, thermodynamic and kinetic studies.

AMB Express 2017 Dec 22;7(1):225. Epub 2017 Dec 22.

Department of Environmental Health Education and Health Promotion, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Islamic Republic of Iran.

Pomegranate waste modified with Fe and Fe ions followed with carbonization were used as an adsorbent to remove the Pb ions from aqueous solution. To optimum the highest adsorption efficiency, adsorption experiments were conducted on iron modified carbons by batch technique. The characteristic of composite was studied by scanning electron microscope (SEM) and Fourier transform infrared spectrometer (FT-IR). The best pH for control of chemical adsorption was selected within pH of 6.0-6.5. It was observed that the contact time of 90 min, initial concentration 50.0 ppm, and adsorbent dose, 1.0 g/100 ml solution was found to be optimum conditions. On this condition, the maximum adsorption capacity was obtained 27.5 and 22.5 mg/g for Fe and Fe impregnated pomegranate peel carbons (PPC), respectively. The value of C, 1.584 for Fe-PPC and 0.552 for Fe-PPC, indicates that the effect of the boundary layer is more important in adsorption of Pb by Fe-PPC and the pore diffusion is the rate limiting mechanism after 30 min. Thermodynamic parameters of Gibbs free energy, enthalpy, and entropy of Pb adsorption on iron-modified carbons suggest that the adsorption process is favorable and spontaneous under the optimum condition.
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http://dx.doi.org/10.1186/s13568-017-0520-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5741572PMC
December 2017

Ozone-cathode microbial desalination cell; An innovative option to bioelectricity generation and water desalination.

Chemosphere 2017 Dec 4;188:470-477. Epub 2017 Sep 4.

Environmental Science and Technology Research Center, Department of Environmental Health Engineering, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Electronic address:

Microbial desalination cell (MDC) is a new approach of water desalination methods, which is based on ionic species removal from water in proportion to the electric current generated by bacteria. However, the low current generation and insufficient deionization in this technology have created challenges to improve the process. Here, the performance of MDC using ozone as a new electron acceptor (O-MDC) was evaluated versus another operated independently with oxygen (O-MDC). Results showed the maximum open-circuit voltages of 628 and 1331 mV for 20 g L NaCl desalination in O-MDC and O-MDC, respectively. The O-MDC produced a maximum power density of 4.06 W m (about 11 times higher than O-MDC) while at the same time was able to remove about 74% of salt (55.58% in the O-MDC). Each cycle of O-MDC and O-MDC operation lasted about 66 and 94 h, respectively, indicating a more stable current profile in the O-MDC. Moreover, sequencing test based on 16S rRNA gene showed that the anode biofilm had more diverse microbial community than anolyte sample. Proteobacteria, Firmicutes and Acidobacteria were from dominant microbial communities in anode biofilm sample. Accordingly, the results revealed that ozone can enhance MDC performance either as a desalination process or as a pre-treatment reactor for downstream desalination processes.
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http://dx.doi.org/10.1016/j.chemosphere.2017.09.009DOI Listing
December 2017

The Nickel Concentration in Breast Milk during the First Month of Lactation in Yazd, Center of Iran.

Biol Trace Elem Res 2016 Nov 5;174(1):65-70. Epub 2016 May 5.

Department of Food Hygiene and Safety, Faculty of Environmental Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

Breastfeeding plays an important role in the growth and development of breastfed infants, especially in the first 6 months of their lives. The present study was conducted to determine the nickel concentrations in breast milk of lactating women in Yazd, Iran. One hundred fifty volunteers were selected among nursing mothers referring to health centers in Yazd. In the first month of lactation, milk samples were collected three times, on days 3 to 5 (first), 16 (Second), and 30 (third) after delivery. Nickel concentration of the samples was measured by atomic absorption spectrophotometer. Demographic variables were collected through a questionnaire which was completed by mothers. The mean age of the study group was 27.40 ± 4.66 years. The mean nickel concentrations in breast milk at the first, second, and third samples were 47.3 ± 7.40, 49.9 ± 8.05, and 54.8 ± 7.38 μg/l, respectively. The concentration of nickel in the breast milk of more than 86 % of mothers was higher than the permissible range for it. There was no significant relationship between the mean value of nickel in breast milk and education, age, and job of mothers. High level of nickel in breast milk may be attributed to consumed food and drinking water containing nickel. Monitoring the nickel level in breast milk regularly is recommended.
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http://dx.doi.org/10.1007/s12011-016-0703-6DOI Listing
November 2016

Comparison between Ag (I) and Ni (II) removal from synthetic nuclear power plant coolant water by iron oxide nanoparticles.

J Environ Health Sci Eng 2013 Jul 25;11(1):21. Epub 2013 Jul 25.

Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

The impact of effective parameters such as iron oxide nanoparticles dosage, contact time and solution pH was optimized for removal of Ag(I) and Ni(II) in the nuclear cooling system and the best conditions were compared. Nearly complete removal (97%) of Ni(II) and Ag(I) were obtained at adsorbent dosage of 40 and 20 g/L, respectively. Experiments showed that 4 hours was a good choice as optimum contact time for two ions removal. The effective parameter was pH, so that maximum removal efficiency was obtained for Ag(I) in acidic pH=3 and for Ni(II) in basic pH=10. It seems that removal of Ag(I) was controlled by adsorption-reduction mechanism, but Ni(II) could place only adsorption. Langmuir and Freundlich model was more suitable for nickel and silver removal by this adsorbent, respectively. Ag(I) and Ni(II) removal efficiency trend by this adsorbent is similar at periods but different in the concentrations, pHs and equilibrium model. The obtained results were very promising, as both Ag(I) and Ni(II) were effectively removed from synthetic wastewater and there was a possibility to remove Ag(I) very fast. Hence, the idea of using nanoparticles for application of metal ions removal from wastewaters seems to be very efficient and quite promising.
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http://dx.doi.org/10.1186/2052-336X-11-21DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4176308PMC
July 2013

Removal of cadmium (II) from simulated wastewater by ion flotation technique.

Iranian J Environ Health Sci Eng 2013 7;10(1):16. Epub 2013 Feb 7.

Department of Environmental Health Engineering, Faculty of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran.

A separation technique which has recently received a sharp increase in research activities is "ion flotation". This technique has four important advantages for treating wastewaters: low energy consumption, small space requirements, small volume of sludge and acting selectively. The present study aims to optimize parameters of ion flotation for cadmium removal in simulated wastewater at laboratory scale. It was obtained on the reaction between Cd(2+) and sodium dodecylesulfate (SDS) collector followed by flotation with ethanol as frother. Test solution was prepared by combining the required amount of cadmium ion, SDS and necessary frother or sodium sulfate solution. All experiments were carried out in a flotation column at laboratory temperature (27°C), adjusted pH = 4 and 120 minutes. The different parameters (namely: flow rate, cadmium, SDS and frother concentrations and ionic strength) influencing the flotation process were examined. The best removal efficiency obtained at a collector-metal ratio of 3:1 in 60 min with flow rate of 150 mL/min was 84%. The maximum cadmium removal was 92.1% where ethanol was introduced at a concentration 0.4% to flotation column with above conditions. The obtained results were promising, as both cadmium and collector were effectively removed from wastewater. Hence, the application of ion flotation for metal ions removal from effluents seems to be efficient.
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http://dx.doi.org/10.1186/1735-2746-10-16DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3691621PMC
May 2014