Evaluation of synergistic factors on BTEX urinary biomarkers in motorcycle riders exposed to heavy traffic in a megacity.

Fuel combustion is a major source of volatile organic compounds such as benzene, a known human carcinogen. Benzene is metabolized into intermediate biomarkers that can be used to assess the extent of exposure. This study aimed to investigate the association between urinary concentrations of creatinine (Cr), muconic acid (MA), trans, trans-muconic acid (tt-MA), and hippuric acid (HA) with demographic, lifestyle, and occupational factors among motorcyclists exposed to heavy traffic in the Shiraz metropolis, both before and after shift work.

Optimizing a hybrid process of electrolysis ultrasound and persulfate for remediation of petroleum contaminated soils using AI models.

Research uses both RANSAC Regressor and Monte Carlo Optimization to improve the performance of electrolysis/ultrasound/persulfate system which detoxifies petroleum-contaminated soils. The Artificial Intelligence (AI) models used to optimize six process parameters showed X2 (humidity) and X3 (voltage) and X5 (surfactant) enhanced removal efficiency the most but X1 (pH) presented a robust negative impact. The selected optimal conditions for pollutant removal resulted from Monte Carlo simulations which specified X1 at 8.

Retraction notice to "In situ treatment of metalworking wastewater by chemical addition-dissolved air flotation coupled with UV, HO & ZnO" [Heliyon 6 (2020) e03091].

[This retracts the article DOI: 10.1016/j.heliyon.

Study of the economic consequences and phthalate emission caused by centralized and decentralized patterns of infectious waste management.

The development of health services of hospitals in developing countries has led to a significant increase in the production of infectious waste, which has important economic and environmental consequences. Therefore, reducing pollutant leakage caused by disinfection and reducing infectious waste management costs are important in achieving sustainable development goals in hospital management. In this study, the centralized and decentralized patterns of infectious waste management were studied in three hospitals in Behbahan, Iran.

Study of the impact of structural factors and cleaning efficiency in reducing hazardous litter density and its related pollution in urban environment.

Cigarette filter is the most common hazardous litter that contains many pollutants including PAHs. The durability of this litter in the urban environment has an important effect on the rate of pollutant leakage. In this study, the leakage rate of PAHs from the littered cigarette filters was estimated by considering the affecting parameters on their durability in the urban environment.

Techno-environmental study on the consequences of carwash wastewater and its management methods.

Carwash wastewater (CWW) is an important source of environmental pollution. The aim of this study was to investigate the characteristics of CWW and technical comparison of its treatment methods. For this purpose, a systematic search was conducted and after three stages of screening the found articles, finally 30 articles were selected for this review.

Comprehensive health risk analysis of heavy metal pollution using water quality indices and Monte Carlo simulation in R software.

Rapid urbanization, population growth, agricultural practices, and industrial activities have led to widespread groundwater contamination. This study evaluated heavy metal contamination in residential drinking water in Shiraz, Iran (2021). The analysis involved 80 groundwater samples collected across wet and dry seasons.

Cigarette butts as a super challenge in solid waste management: a review of current knowledge.

Filtered cigarette is the most common type of tobacco used and cigarette butt is the most important environmental consequence of smoking. This study aimed to investigate the cigarette butt management and identify future needs to improve the current situation. The results showed that cigarette butts are the most abundant and widespread hazardous waste in the world.

Magnetic CuNiFeO nanoparticles loaded on multi-walled carbon nanotubes as a novel catalyst for peroxymonosulfate activation and degradation of reactive black 5.

Novel copper-nickel ferrite nanocatalyst loaded on multi-walled carbon nanotube (MWCNTs-CuNiFeO) was synthesized and applied to activate peroxymonosulfate (PMS) in the degradation of the reactive black 5 (RB5). The structure of the catalyst was well characterized by scanning electron microscope (SEM), Fourier-transform infrared spectroscopy (FTIR), and X-ray powder diffraction (XRD). The MWCNTs-CuNiFeO/PMS system showed a high performance in the degradation of RB5 with a kinetic rate of 1.

In situ treatment of metalworking wastewater by chemical addition-dissolved air flotation coupled with UV, HO & ZnO.

The hybrid treatment techniques have been proven that could be a proper solution to the metalworking fluid (MWF) wastewaters disposal challenge. Hence, this investigation was conducted aim to the assessment of chemical addition-dissolved air floatation (CA-DAF) unit followed with a heterogeneous photocatalytic (PC) process as UV/HO/ZnO to treat MWF wastewater produced in one of the central industrial estates in the Middle East. The CA-DAF unit was implemented as trial and errors and had an appropriate efficiency.

Environmental and biological monitoring of exposures to VOCs in a petrochemical complex in Iran.

Exposure to volatile organic compounds (VOCs) can cause cancers in human. This study aimed to measure the concentration of four VOCs including benzene, styrene, ethylbenzene, and phenol in ambient air of a petrochemical complex in Iran. Also, their urinary metabolites including phenol, mandelic acid (MA), and phenylglyoxylic acid (PGA) in the workers were monitored.