Reference Laboratory for Drinking Water, Holding Company for Water and Wastewater and IGSR, Alexandria University, Alexandria, Egypt,
Environ Sci Pollut Res Int. 2013 Oct;20(10):7152-66. doi: 10.1007/s11356-013-1501-8. Epub 2013 Jul 14.
Chlorine has been utilized in the early stages of water treatment processes as disinfectant. Disinfection for drinking water reduces the risk of pathogenic infection but may pose a chemical threat to human health due to disinfection residues and their by-products (DBP) when the organic and inorganic precursors are present in water. In the last two decades, many modeling attempts have been made to predict the occurrence of DBP in drinking water. Models have been developed based on data generated in laboratory-scale and field-scale investigations. The objective of this paper is to develop a predictive model for DBP formation in the Alexandria governorate located at the northern west of Egypt based on field-scale investigations as well as laboratory-controlled experimentations. The present study showed that the correlation coefficient between trihalomethanes (THM) predicted and THM measured was R (2)=0.88 and the minimum deviation percentage between THM predicted and THM measured was 0.8 %, the maximum deviation percentage was 89.3 %, and the average deviation was 17.8 %, while the correlation coefficient between dichloroacetic acid (DCAA) predicted and DCAA measured was R (2)=0.98 and the minimum deviation percentage between DCAA predicted and DCAA measured was 1.3 %, the maximum deviation percentage was 47.2 %, and the average deviation was 16.6 %. In addition, the correlation coefficient between trichloroacetic acid (TCAA) predicted and TCAA measured was R (2)=0.98 and the minimum deviation percentage between TCAA predicted and TCAA measured was 4.9 %, the maximum deviation percentage was 43.0 %, and the average deviation was 16.0 %.
氯在水处理过程的早期阶段被用作消毒剂。饮用水消毒可以降低致病感染的风险，但由于有机和无机前体存在于水中时，消毒残留物及其副产物（DBP）可能会对人类健康构成化学威胁。在过去的二十年中，已经进行了许多建模尝试来预测饮用水中 DBP 的发生。这些模型是基于实验室规模和现场规模调查中生成的数据开发的。本文的目的是基于现场调查以及实验室控制实验，为埃及西北部亚历山大省的 DBP 形成开发预测模型。本研究表明，三卤甲烷（THM）预测值与实测值之间的相关系数 R（2）为 0.88，THM 预测值与实测值之间的最小偏差百分比为 0.8%，最大偏差百分比为 89.3%，平均偏差为 17.8%，而二氯乙酸（DCAA）预测值与实测值之间的相关系数 R（2）为 0.98，DCAA 预测值与实测值之间的最小偏差百分比为 1.3%，最大偏差百分比为 47.2%，平均偏差为 16.6%。此外，三氯乙酸（TCAA）预测值与实测值之间的相关系数 R（2）为 0.98，TCAA 预测值与实测值之间的最小偏差百分比为 4.9%，最大偏差百分比为 43.0%，平均偏差为 16.0%。
