三卤甲烷
化学
水处理
分数(化学)
溶解有机碳
分馏
天然有机质
卤乙酸
有机质
环境化学
傅里叶变换红外光谱
化学工程
色谱法
有机化学
氯
环境工程
工程类
作者
Hyun-Chul Kim,Meilin Yu
出处
期刊:Water Research
[Elsevier]
日期:2005-11-01
卷期号:39 (19): 4779-4789
被引量:268
标识
DOI:10.1016/j.watres.2005.09.021
摘要
Natural organic matter (NOM) from raw and process waters at a conventional water treatment plant was isolated into hydrophobic and hydrophilic fractions by physicochemical fractionation methods to investigate its characteristics. Formation potential of trihalomethanes (THMs) was highly influenced by the hydrophobic fraction, whereas haloacetic acids formation potential (HAAFP) depended more on the hydrophilic fraction. However the hydrophobic fraction was removed more than the hydrophilic fraction through conventional water treatment. Therefore residual hydrophilic NOM after conventional treatment needs to be removed to reduce HAAFP. Feasible additional processes are required to be evaluated by comparing preferential removal efficiency of hydrophilic NOM through pilot tests. The structural and chemical characteristics of hydrophobic NOM (i.e., humic substances (HS)) were further investigated to know how they are influenced by conventional treatment. The phenolic fraction in the hydrophobic NOM was mainly removed compared to the carboxylic fraction through water treatment, and a higher formation potential of THMs resulted from NOM with a higher phenolic content. The Fourier-transform infrared (FT-IR) and proton nuclear magnetic resonance (1H-NMR) employed for characterization of NOM through water treatment were insightful revealing that their results were quite close to each other. Decreases of ratio of UV absorbance at 253 and 203 nm, respectively (A253/A203 ratio) and trihalomethane formation potential/dissolved organic carbon (THMFP/DOC) showed consistent trends; therefore, the A253/A203 ratio may be a good indicator of tendency for the formation potential of disinfection by-products (DBPs).
科研通智能强力驱动
Strongly Powered by AbleSci AI