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Modeling of wastewater treatment by Azolla filiculoides using response surface methodology
ConclusionsAzolla could remove phosphorus in nitrogen deficiency or even lack of nitrogen. Results indicate that removal efficiency has an upward trend as theAzolla growth increases. This kind of fern has a significant effect on removing nitrogen, phosphorus, and COD from an aqueous solution. The removal efficiency of TN, TP, and COD at optimum operating conditions showed good agreement with model-predicted removal efficiency. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - September 14, 2021 Category: Environmental Health Source Type: research

Strategies and experiences for sand and dust storm adaptation: A qualitative study in Iran
ConclusionsIdentifying the experiences and strategies that are implemented by a community to adapt to SDS is the core stone for developing a comprehensive local and national adaptation plan. This study suggests strategies and action plans for SDS adaptation that can be used in policy making. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - September 14, 2021 Category: Environmental Health Source Type: research

Performance evaluation of wastewater treatment plants under the sewage variations imposed by COVID-19 spread prevention actions
This study evaluates the performance of wastewater treatment plants (WWTPs) during COVID-19 pandemic and related SPAs. This evaluation also considers MW variations in quality and quantity and  compares the performance of WWTPs (2020) with earlier data (2015–2019). For this purpose, 23 WWTPs located in Isfahan province, Iran, were chosen as the study area and classified based on their locations, biological treatment unit, and capacities. Results indicate that the inflow of WWTPs incr eased 20 % on average during SPAs, while the concentrations of COD and BOD in MW decreased 23 and 16 %, respectively. Nevertheless...
Source: Journal of Environmental Health Science and Engineering - September 13, 2021 Category: Environmental Health Source Type: research

Assessing BTEX concentrations emitted by hookah smoke in indoor air of residential buildings: health risk assessment for children
AbstractHookah smoke is one of the major indoor sources of Volatile Organic Compounds (VOCs), including Benzene, Toluene, Ethylbenzene, and Xylenes (BTEX). The present study aimed to investigate potential exposure to BTEX compounds among primary school children whose parents smoked hookah at home. BTEX concentrations in indoor air were measured in 60 residential buildings of Khesht, southwestern Iran (case  = 30 and control = 30). Target compounds were sampled by charcoal tubes, and the samples were then analyzed by GC-FID. Monte Carlo simulation was used to assess the carcinogenic and non-carcinogenic risks of BTX...
Source: Journal of Environmental Health Science and Engineering - September 9, 2021 Category: Environmental Health Source Type: research

Phytoremediation ability of H. strobilaceum and S. herbacea around an industrial town
AbstractContaminations of soil and water resources with various organic and inorganic compounds are of great importance on account of the close relationship between the living organisms and their feeding. That is due to direct impact in supplying food for living organisms in terms of environmental and human health aspects. In this regard, the present study aimed to investigate the phytoremediation potential ofH. strobilaceum andS. herbacea in contaminated soils. For this purpose, soil and plant samples were collected from around the sewage channel in Eshtehard industrial region of Iran. Sampling started at the edge of the ...
Source: Journal of Environmental Health Science and Engineering - September 5, 2021 Category: Environmental Health Source Type: research

Molecular identification of aflatoxigenic Aspergillus species in dried nuts and grains collected from Tehran, Iran
ConclusionAccording to the contamination of dried nuts and grains by some aflatoxigenic fungi, an extensive surveillance is necessary to provide a wider view on these products. Moreover, effective and efficient aflatoxin control program requires identifying and managing key elements that are effective in reducing mycotoxin production at farm level or in storage conditions. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - September 5, 2021 Category: Environmental Health Source Type: research

Latent class analysis of initial nicotine dependence among adult waterpipe smokers
This study revealed that nearly half of WP smokers fell under moderate and high-dependent classes. Our findings showed that some items of HONC had more role in the clustering of participants based on ND symptoms. The WP-specific cessation programs and targeted clinical trials should consider the diversity of ND levels among smokers to achieve successful quit rates among these smokers. Additionally, limiting flavors would be a strong strategy to limit the rate of ND, especially among young people who are eager to smoke flavored WP tobacco. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - September 3, 2021 Category: Environmental Health Source Type: research

Contrasting Iran ’s air quality improvement during COVID-19 with other global cities
ConclusionsAlthough the outbreak of coronavirus has imposed devastating impacts on economy and health, it can have positive effects on air quality, according to the results. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - September 3, 2021 Category: Environmental Health Source Type: research

Application of MCAT to provide multi-objective optimization model for municipal waste management system
AbstractChoosing an appropriate municipal waste management method is a very complicated environmental problem in cities. This research introduces an optimization model for waste management in the southwest region of Tehran province. It was developed by a metaheuristic algorithm that was used to minimize the economic and environmental costs. Incineration, composting, recycling and landfilling waste management methods were considered. Three scenarios were developed to determine the optimum allocation of waste to each method such to fulfill the objective of overall minimum of environmental burdens and costs. A multi-objective...
Source: Journal of Environmental Health Science and Engineering - September 2, 2021 Category: Environmental Health Source Type: research

Synthesis and characterization of tetraethylene pentamine functionalized MIL-101(Cr) for removal of metals from water
ConclusionsTEPA-MIL-101(Cr) was synthesized successfully by a simple, and cost-effective method. The removal efficiency of TEPA-MIL-101(Cr) for the metal ions achieved more than 95  % in real water samples, which in addition to its thermal stability character make it a promising candidate for water treatment purposes. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - September 1, 2021 Category: Environmental Health Source Type: research

Performance evaluation and siting index of the stabilization ponds based on environmental parameters: a case study in Iran
This study has shown that setup and design of the new waste stabilization ponds in Iran need to take into account by considering environmental factors because these fa ctors have the main effect on algae growth which are one of main biological treatment. (Source: Journal of Environmental Health Science and Engineering)
Source: Journal of Environmental Health Science and Engineering - August 30, 2021 Category: Environmental Health Source Type: research

Operational parameters influenced on biogas production in zeolite/anaerobic baffled reactor for compost leachate treatment
In this study an anaerobic baffled reactor (ABR) was used for investigating impact of OLR on biogas production and changes of alkalinity and pH. In order to decline inhibitors concentration on anaerobic microorganisms, zeolite was considered as a media and changes of biogas production was surveyed in different filling ratios. The highest produced biogas at the filling ratios of 10  %, 20 and 30 % were 0.6, 0.63 and 0.9 L/day, respectively and OLR increasing resulted in increase in produced biogas. The values of alkalinity and pH remained in the optimum range for methanogenic bacteria. In all three filling ratios, conc...
Source: Journal of Environmental Health Science and Engineering - August 30, 2021 Category: Environmental Health Source Type: research

Assessment of fungal bioaerosols and particulate matter characteristics in indoor and outdoor air of veterinary clinics
AbstractVeterinary staff are frequently exposed to various occupational hazards. The present study was aimed to investigate the air characteristics of veterinary clinics in terms of fungal bioaerosols and particulate matters. Air samples were taken every six days from the operating room, examination room and outdoor air of three veterinary clinics in Shiraz, southwest Iran. The concentrations of fungal bio-aerosols ranged from 8.05  CFU/m3 in the outdoor air of clinic B to 47.21  CFU/m3 in the operating room of clinic A. The predominant fungal genera identified in the studied clinics werePenicillium andAspergillus niger,...
Source: Journal of Environmental Health Science and Engineering - August 28, 2021 Category: Environmental Health Source Type: research

Indoor radon measurement in buildings of a university campus in central Iran and estimation of its effective dose and health risk assessment
In this study, radon and thoron levels of 20 multi-floor buildings on the campus of Isfahan University of Medical Sciences were measured in cold and hot seasons of a year. SARAD- RTM1688 radon and thoron monitor was used for measurement. The annual effective dose of radon exposure was also estimated for residences on the campus. The results showed that radon concentration was below the WHO guideline (100 Bq m− 3) in most of the buildings. The ranges of radon were from 3  ± 10% to 322 ± 15% Bq m− 3 in winter and from below the detectable level to 145  ± 8% Bq m− 3 in summer. Mostly, the radon conc...
Source: Journal of Environmental Health Science and Engineering - August 28, 2021 Category: Environmental Health Source Type: research

The prevalence of foodborne parasites in raw vegetables in Iran: a comprehensive systematic review and meta-analysis
AbstractFoodborne parasites in raw vegetables could cause parasitic infections in humans. An effective approach to the reduction of pathogenic microorganisms in vegetables involves identifying the main sources of contamination and the ecology of the involved microorganisms. This review aimed to evaluate the prevalence of foodborne parasites in raw vegetables in Iran. According to the reviewed studies, the prevalence rate ofAscaris spp.,Giardia spp.,Toxocara spp.,Fasciola,Trichuris,Cryptosporidium,Dicrocoeliasis,Taenia spp., andEntamoeba histolytica was 6  % (95 % CI: 5–8 %), 6 % (95 % CI: 5–7 %), 6 % (95â...
Source: Journal of Environmental Health Science and Engineering - August 27, 2021 Category: Environmental Health Source Type: research