Journal of Environmental Health Science and Engineering This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Estimating greenhouse emissions from sanitary landfills using Land-GEM and IPCC model based on realistic scenarios of different urban areas: a case study of Iran
This study examined the emission of greenhouse gases from municipal solid waste disposal centers in different regions of Iran based on different scenarios. Assuming landfill site opening in 2012 and considering the 20-year plan period for its usage, the amount of wastes entering the landfill site was calculated for 2012 –2032. For calculating the production of methane (CH4) and other gases during different years of the project, Land-GEM and IPCC model were used. We defined 9 scenarios for these two models based on the growth rate of population and waste generation. The results revealed that the lowest amount of gas emiss...
Source: Journal of Environmental Health Science and Engineering - May 6, 2021 Category: Environmental Health Source Type: research

Deterministic and probabilistic human health risk assessment approach of exposure to heavy metals in drinking water sources: A case study of a semi-arid region in the west of Iran
AbstractIn the current study, the concentration of heavy metals (Ba, Mn, Pb, and Cd) in drinking water resources of 328 villages in Hamadan Province were measured using ICP-OES apparatus during two dry (September 2018) and wet (April 2019) seasons. The assessment of the non-carcinogenic risk of selected heavy metals was conducted based on the recommendations of the USEPA. Also, sensitivity analysis and uncertainty of the effective variables were performed using Monte-Carlo simulations. Based on the results, Mn level in drinking water samples ranged 0.08 –25.63 μg/L and 0.08–20.03 μg/L in dry and wet seasons, respec...
Source: Journal of Environmental Health Science and Engineering - May 5, 2021 Category: Environmental Health Source Type: research

Bioleaching of critical metals from waste OLED touch screens using adapted acidophilic bacteria
AbstractThe mobile phone is a fast-growing E-waste stream that includes hazardous substances and valuable metals. Smartphone touch screens (SPTS) contain a considerable amount of critical metals, such as indium and strontium that can be recovered from end of life devices as a secondary resource. Bioleaching is an emerging and environmentally friendly method for metal recovery from electronic waste. In the present study, bioleaching was assessed for the extraction of indium and strontium from organic light emitting diode type smartphone touch screens. A statistical approach based on the response surface methodology was succ...
Source: Journal of Environmental Health Science and Engineering - May 4, 2021 Category: Environmental Health Source Type: research

Optimization of photo-electro/Persulfate/nZVI process on 2 –4 Dichlorophenoxyacetic acid degradation via central composite design: a novel combination of advanced oxidation process
Abstract2 –4 Dichlorophenoxy acetic acid is most publicly applied from chlorinated phenoxy acids herbicides. In this research, central composite design for optimization of photo-Elecro/persulfate/nZVI process to degradation and mineralization of this herbicide in aqueous solution to environment protection w as applied. The initial pH (2–4), persulfate anion concentration (0.25–0.5 mg/L), direct electrical (0.5–1 A), herbicide concentration (50–100 mg/l), nZVI dose (0.05–1 mg/L), and reaction time (50–100 mg/l) are independent variables optimized. Also, the synergist effect, COD and TOC removal, the effect...
Source: Journal of Environmental Health Science and Engineering - May 4, 2021 Category: Environmental Health Source Type: research

Systematic review and metal analysis on three important fungal group (dermatophytes, yeasts and saprophytes) isolated from Iranian swimming pools
AbstractThe swimming pool particularly has been considered in tropical area and warm seasons in order to recreational actives and also different exercises. Therefore, poor management and unhealthy behavior of swimmers could be a cause of fungal diseases transmission among swimmers. The present study has addressed the literatures on the topic of fungal contamination of indoor/outdoor swimming pools in Iran. Based on the literature review, most common fungal contaminations were on the list of sporophytes fungus. The majority of the reported and isolated fungal wereAspergillus spp.(50  %), Rhizopus spp., Cladosporium spp.ka...
Source: Journal of Environmental Health Science and Engineering - May 3, 2021 Category: Environmental Health Source Type: research

The assessment of two different pollutants dispersion from a coal-fired power plant for various thermal regimes
In this study, numerical simulations of the movement and emissions dispersion of two pollutants (sulfur dioxide(SO2) and carbon dioxide(CO2)) into the atmospheric boundary layer were considered under natural atmospheric conditions. To test the numerical algorithm and to select the optimal turbulent model, the test problem was solved numerically. The obtained computational data were compared with measurement data and values from the computation of other authors and the SST k-omega model illustrated the closest values to the data from the experiment, this is achieved by modifying the boundary condition for turbulent kinetic ...
Source: Journal of Environmental Health Science and Engineering - May 3, 2021 Category: Environmental Health Source Type: research

Systematic review and metal analysis on tree important fungal group ( dermatophytes, yeasts and saprophytes ) isolated from Iranian swimming pools
AbstractThe swimming pool particularly has been considered in tropical area and warm seasons in order to recreational actives and also different exercises. Therefore, poor management and unhealthy behavior of swimmers could be a cause of fungal diseases transmission among swimmers. The present study has addressed the literatures on the topic of fungal contamination of indoor/outdoor swimming pools in Iran. Based on the literature review, most common fungal contaminations were on the list of sporophytes fungus. The majority of the reported and isolated fungal wereAspergillus spp.(50  %), Rhizopus spp., Cladosporium spp.ka...
Source: Journal of Environmental Health Science and Engineering - May 3, 2021 Category: Environmental Health Source Type: research

Characteristics and health effects of potentially pathogenic bacterial aerosols from a municipal solid waste landfill site in Hamadan, Iran
This study highlights the importance of exposure to potential pathogenic bacterial aerosols in the summer and its adverse effects, especially in the MSW landfill site active zone. Finally, controlled exposure can reduce the health hazard caused by the potential pathogenic bacterial aerosols. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - May 2, 2021 Category: Environmental Health Source Type: research

Evaluation of iron and manganese removal effectiveness by treatment plant modules based on water pollution index; a comprehensive approach
AbstractGroundwater is a viable alternative when access to surface water resources is limited. Iron and manganese are known ions in soil and naturally in groundwater sources. However, human activities also are responsible. To identifying the best module for removing manganese and iron in the water treatment plant (WTP) of Mazandaran, 516 samples were taken from raw and treated water. The concentration of manganese, iron, was measured by atomic absorption spectrophotometry, and turbidity was used with the nephelometry method. The water pollution index (WPI) was applied for categorizing the status of pollution in treated wat...
Source: Journal of Environmental Health Science and Engineering - May 2, 2021 Category: Environmental Health Source Type: research

Relationship between ambient black carbon and daily mortality in Tehran, Iran: a distributed lag nonlinear time series analysis
ConclusionsThis study in Tehran found significant effects of BC exposure on daily mortality for cardiovascular, ischemic heart disease, cerebrovascular disease. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - April 30, 2021 Category: Environmental Health Source Type: research

The toxicity of SiO 2 NPs on cell proliferation and cellular uptake of human lung fibroblastic cell line during the variation of calcination temperature and its modeling by artificial neural network
In this study, parameters were adjusted as CT(70 –1000 °C), calcination time(2, 12, and 24 h), and catalyst feed rate(0.01, 0.05, and 0.1 mL.min1). CP was determined by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide(MTT) test after a 24-h exposure. The CU was achieved using ICP-MS. Results were analyzed using MATLAB2018. Results revealed that the size of synthesized particles was lower than 50  nm and, the XRD peak varied from 21 to 30° during the increase in CT. FTIR spectra confirmed the existence of Si-O and Si-Cl bonds. The maximum level of crystallization was at 1000 °C. CP decreased with t...
Source: Journal of Environmental Health Science and Engineering - April 30, 2021 Category: Environmental Health Source Type: research

Preparation of nanoemulsion of Cinnamomum zeylanicum oil and evaluation of its larvicidal activity against a main malaria vector Anopheles stephensi
ConclusionsA novel larvicide based on nanotechnology introduced. This experiment clearly showed increasing larvicidal activity and residual effect of the nanoformulation in comparison with the bulk essential oil. It could be concluded that this nanoemulsion may be considered as safe larvicide and should be subject of more research in this field.Graphical abstract (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - April 29, 2021 Category: Environmental Health Source Type: research

Degradation of 2, 4, 6-trinitrotoluene (TNT) from aqueous solution by coupled electrocoagulation process with persulfate salt
ConclusionAccording to the findings, electrocoagulation procedure is suggested as an applicable method in TNT reduction from aqueous solution. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - April 28, 2021 Category: Environmental Health Source Type: research

Effect of human body position on gamma radiation dose rate from granite stones
AbstractThe use of granite stones as building materials in homes or offices can result in the residents ’ long-term whole-body exposure to gamma radiation. Although the whole-body annual dose has been investigated in the literature, it is obvious that different human organs receive different equivalent dose due to different position respect to the walls and floor covered by granite stones. In this p aper, the effect of distance from the walls and floor of a room on the equivalent dose is investigated by using MCNPX code. An “ORNL” phantom is simulated in three situations; standing (P1), sleeping one meter above the f...
Source: Journal of Environmental Health Science and Engineering - April 26, 2021 Category: Environmental Health Source Type: research

Impact of smoking on oxidant/antioxidant status and oxidative stress index levels in serum of the university students
ConclusionsAccording to our findings, the antioxidant capacity in all smokers (active and inactive) was less than the control group (non-smokers). The results of this study showed that smoking reduces the activity of the antioxidant defense system and activates the oxidative stress system in the body. Based on these findings, it can be clearly concluded that the decrease in antioxidant capacity in smokers is associated with increased production of oxidants and free radicals. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - April 26, 2021 Category: Environmental Health Source Type: research