نتایج جستجو برای: thms
تعداد نتایج: 398 فیلتر نتایج به سال:
چکیده حضور ترکیبات تری هالومتان ها ((tmhsدر آب آشامیدنی، فاکتوری در میزان کیفیت آن است. یکی از مهمترین دلایل ذکر شده برای حذف این ترکیبات از آب شرب، نقش آن ها به عنوان مواد سرطانزای خطرناکی است که بعد از گندزدایی تشکیل می شوند. در این تحقیق کارایی تخریب ترکیبات تری هالومتان ها با استفاده از سرامیک های پوشش داده شده با tio2 که داخل لوله های شیشه ای از جنس کوارتزکه پرتوفرابنفش (uv) را از خود عب...
The high chlorine dosages in wastewater treatment plants during the COVID-19 pandemic may result increased formation of disinfection by-products (DBPs), posing great threat to aquatic ecosystem receiving water body and public health downstream area. However, limited information is available on effect biological processes CX3R-type DBPs. This study investigated oxidation ditch (OD) anaerobic-ano...
BACKGROUND We previously conducted a study to assess whether household exposures to tap water increased an individual's internal dose of trihalomethanes (THMs). Increases in blood THM levels among subjects who showered or bathed were variable, with increased levels tending to cluster in two groups. OBJECTIVES Our goal was to assess the importance of personal characteristics, previous exposure...
BACKGROUND Evidence for an association between exposure during pregnancy to trihalomethanes (THMs) in drinking water and impaired fetal growth is still inconsistent and inconclusive, in particular, for various exposure routes. We examined the relationship of individual exposures to THMs in drinking water on low birth weight (LBW), small for gestational age (SGA), and birth weight (BW) in single...
Providing safe tap water while limiting the occurrence of disinfection by-products (DBPs) is probably one most challenging aspects environmental chemical engineering within urban cycle. In present work, an investigation about this challenge for real conditions a full-scale drinking treatment plant has been carried out. Five different and well-known technologies (four aeration procedures, coagul...
BACKGROUND Bladder cancer has been linked with long-term exposure to disinfection by-products (DBPs) in drinking water. OBJECTIVES In this study we investigated the combined influence of DBP exposure and polymorphisms in glutathione S-transferase (GSTT1, GSTZ1) and cytochrome P450 (CYP2E1) genes in the metabolic pathways of selected by-products on bladder cancer in a hospital-based case-contr...
Tsukuba hypertensive mice (THMs) are transgenic mice carrying human renin and angiotensinogen genes. The aim of this study was to evaluate the role of the renin-angiotensin system (RAS) in cardiac hypertrophy and renal disorders in THMs. After a 2-wk control period, 10-wk-old THMs were treated with lisinopril (ACEI group) or hydralazine (hydralazine group) or left untreated (control group) for ...
The effects of calcium, cupric, ferrous and ferric ions on the formation of trihalomethanes (THMs) and haloacetic acids (HAAs) were investigated using natural organic matter (NOM), small molecular weight NOM surrogates and natural water samples. The results showed that the effects were greatly dependent on the disinfection byproduct (DBP) precursor structure and molecular weight, and metal ions...
AIM This study examined the effects on disinfection by-product (DBP) concentrations of common household methods for processing drinking water. METHODS We investigated the effects of refrigerator storage, jug filtering, boiling in an electric kettle, and supply from an instant boiling water unit, with or without filtering, on four species of trihalomethanes (THMs) and nine species of haloaceti...
Drinking water treatment plants (DWTP) use chlorination as an oxidation stage in the first step of processes used to eliminate natural organic matter (NOM) responsible for formation 2-methylisoborneol (2-MIB) and Geosmin (GM), which produce odor taste water. However, give rise disinfectant toxic subproducts, such trihalomethanes (THMs). In this work, a headspace solid-phase microextraction coup...
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