The relationship between disinfection by-products formation and characteristics of natural organic matter in raw water

Abstract

The influence of the characteristics of natural organic matter (NOM) on disinfection by-product formation was investigated for Maeri raw water, located in downstream of Nakdong river and Hoedong reservoir at Busan in Korea. The NOM was chlorinated and analyzed for trihalomethanes (THMs), 5 haloacetic acids (HAA-5) and total organic halide (TOX). Aromatic contents determined by specific UV absorbance at 254 nm (SUVA) correlated well with THMs, HAA-5 and TOX formation for the NOM in the Maeri raw water and Hoedong reservoir. Especially, THMFP/ DOC showed better correlation with SUVA than HAAFP-5/DOC and TOXFP/DOC with SUVA. Chloroform formation showed good correlation with SUVA for Maeri raw water, but poor correlation with SUVA for the Hoedong raw water. In addition, TCAA formation potential showed good correlation with SUVA for both raw waters. In contrast, a lack of correlation was observed for DCAA formation for both raw waters. THM formation per unit DOC concentration was 70.2-81.1% and 18.9-29.8% for hydrophobic and hydrophilic organic matter in the Maeri raw water, respectively, in which the hydrophobic organic matter had much higher THM formation. In contrast, HAA-5 formation per unit DOC concentration varied seasonally for Maeri raw water. THM formation in the Maeri raw water had a good correlations with SUVA regardless of the ratio of hydrophobic and hydrophilic fraction, and THM formation per unit DOC concentration was higher for the order of humic acid>fulvic acid>hydrophilic organic matter. HAA-5 formation per unit DOC concentration for the hydrophilic organic matter was about 30 µg per mg DOC regardless of SUVA values, but HAA-5 formation per unit DOC concentration for the hydrophobic organic matter was proportionally increased with increasing SUVA values. However, the HAA-5 formation per mg DOC was the highest for the hydrophilic organic matter.

Human health risk assessment of temporal and spatial variations of ground water quality at a densely industrialized commercial complex at Haridwar, India

“…It also interferes with the disinfection process and results in toxic disinfection by-products (DBPs) such as trihalomethanes (THMs) and haloacetic acids (HAAs) (White et al 2003;Wong et al, 2007;Chow et al, 2008;Ratasuk et al, 2008;Krasner 2009;Matilainen et al, 2010 and2011). DPBs have been reported to pose harmful effects on human health (Hanson and Solomon 2004;Zhou et al, 2006;Jung andSon 2008 andWu et al, 2009). These byproducts had also been identified as a potential fetotoxin, mutagen and carcinogen as well (Ruddick et al, 1983;Reckhow et al, 1990 andBryant et al, 1992).…”

The Degradation of Natural Organic Matter in Surface Water by a Nano‐TiO2/Diatomite Photocatalytic Reactor

“…c. All SUVA values were <2.1, which indicated that the water samples primarily contained hydrophilic and low MW NOM moieties , particularly NEU fractions such as polysaccharose, amino sugar, and micromolecular organic material . The SUVA value and the operation time were negatively correlated, which resulted from the degradation of a portion of macromolecular organic material into micromolecular material by the photocatalysis.…”

Controlling contamination for determination of ultra-trace levels of priority pollutants chlorophenols in environmental water matrices

“…These kinds of applications often lead to wastewater and groundwater contamination. In addition, this class of organic compounds has been also detected in drinking water as a result of tap water chlorination treatment (Jin and Yang, 2006;Jung and Son, 2008;Gurzau et al, 2010;Kadmi et al, 2014a,b). According to different studies, chlorophenols represent a public health concern due to their estrogenic, mutagenic or carcinogenic effects (Wada et al, 1999;Michalowicz and Duda, 2007;Gavrilescu, 2009).…”