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STUDY ON THE EFFECT AND FORMATION OF TRIHALO-METHANES AND HALOACETIC ETHYL ACID IN DRINKING WATERS

Jin Jian-yuan

Open publisher page 4 citations

Abstract

THMs and HAAs, which are two types of disinfection by-products ( DBPs) , were studied in the water samples from Qiantang river in Zhejiang province. The results showed that haloacetic acids (HAAs) and trihalo- methane (THMs) are different with variable conditions of DBPs precursors, water temperature, applied chlorine dose, reaction time and pH. TOC and UV-254 had a high correlation with HAAs precursors, but low with THMs precursors. The total THMs concentration increases with increasing pH value in range of 5-10, but the total HAAs concentration slightly decreases with increasing pH value, the chlorine dose and reaction time have a functional relationship with the formation of HAAs and THMs, and the concentration of HAAs and THMs also increased with increasing temperature in the normal range.

About this research paper

What this paper is about

THMs and HAAs, which are two types of disinfection by-products ( DBPs) , were studied in the water samples from Qiantang river in Zhejiang province. The results showed that haloacetic acids (HAAs) and trihalo- methane (THMs) are different with variable conditions of DBPs precursors, water temperature, applied chlorine dose, reaction time and pH. TOC and UV-254 had a high correlation with HAAs precursors, but low with THMs precursors. The total THMs concentration increases with increasing pH value in range of 5-10, but the total HAAs concentration slightly decreases with increasing pH value, the chlorine dose and reaction time have a functional relationship with the formation of HAAs and THMs, and the concentration of HAAs and THMs also increased with increasing temperature in the normal range.

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Available abstract

THMs and HAAs, which are two types of disinfection by-products ( DBPs) , were studied in the water samples from Qiantang river in Zhejiang province. The results showed that haloacetic acids (HAAs) and trihalo- methane (THMs) are different with variable conditions of DBPs precursors, water temperature, applied chlorine dose, reaction time and pH. TOC and UV-254 had a high correlation with HAAs precursors, but low with THMs precursors. The total THMs concentration increases with increasing pH value in range of 5-10, but the total HAAs concentration slightly decreases with increasing pH value, the chlorine dose and reaction time have a functional relationship with the formation of HAAs and THMs, and the concentration of HAAs and THMs also increased with increasing temperature in the normal range.

Key concepts: Haloacetic acids, Chemistry, Chlorine, Environmental chemistry, Organic chemistry

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STUDY ON THE EFFECT AND FORMATION OF TRIHALO-METHANES AND HALOACETIC ETHYL ACID IN DRINKING WATERS — Research Paper | ScholarLens