BACKGROUND Few studies have used longitudinal ultrasound measurements to assess the effect of traffic-related air pollution on fetal growth. OBJECTIVE We examined the relationship between exposure to nitrogen dioxide (NO2) and aromatic hydrocarbons [benzene, toluene, ethylbenzene, m/p-xylene, and o-xylene (BTEX)] on fetal growth assessed by 1,692 ultrasound measurements among 562 pregnant wom...

Monoaromatic hydrocarbons (MAHs) monitoring is of environmental interest since these chemical pollutants are omnipresent. While waiting for robust sensors able to detect hydrocarbons at very low levels, the present study shows how each compound from pure BTEX mixtures can be identified fast and quantified thanks to Raman spectrometry and data processing based on the SIMPLISMA algorithm. A prepr...

Air pollution in the city of Tehran has been a major problem for the past three decades. The direct effects of hydrocarbon contaminants in the air are particularly important such as their carcinogenic, mutagenic, and teratogenic effects which can be transported to other environments via dry and wet deposition. In the present study, rainwater samples were collected and analyzed for 16 polycyclic...

Enhancement of in situ anaerobic biodegradation of BTEX compounds was demonstrated at a petroleum-contaminated aquifer in Seal Beach, CA. Specifically, combined injection of nitrate and sulfate into the contaminated aquifer was used to accelerate BTEX removal as compared to remediation by natural attenuation. An array of multi-level sampling wells was used to monitor the evolution of the in sit...

The glutathione-S-transferase genes mainly the GSTM1 and GSTT1 alleles are responsible for synthesis of detoxication enzymes that can remove toxic substances. objective this study is to seek changes in genetic polymorphism motorcycle drivers exposed BTEX. Our group consists 60 including 30 professional non-professional. Blood samples were preleveled from population EDTA tubes DNA was extracted ...

In this study, batch experiments were carried out to investigate the effectiveness of persulfate (PS) as an oxidant agent remediate benzene, toluene, ethylbenzene, and xylenes (BTEX) in saline environments at high water temperatures (30 °C). This hydrological setting is quite common contaminated groundwater aquifers Middle Eastern countries. general, increasing system temperature from 10 30 °C ...

Abstract The effect of the chemical composition hydrotreated light cycle oil (HDT LCO) on benzene, toluene, ethylbenzene, and xylene (BTEX) production by a hydrocracking (HCK) procedure, is presented. Six different types HDT LCOs were obtained submitting two to hydrotreating (HDT) with catalysts experimental conditions. products analyzed as mono-, di- tri-aromatic compounds using supercritical ...