人工地下水回灌过程中溶解性有机物的去除及变化

在实验室通过模拟土壤柱研究了人工地下水回灌过程中溶解性有机物的去除及其三卤甲烷生成势和三卤甲烷生成活性的变化.利用XAD树脂将回灌水中的溶解性有机物分为3个部分：疏水性有机酸、过渡亲水性有机酸和亲水性有机物.疏水性有机酸的三卤甲烷生成活性高于过渡亲水性有机酸和亲水性有机物.土壤含水层处理（SAT）对亲水性有机物的去除率为68.51%,对疏水性有机酸和过渡亲水性有机酸的去除率分别为58.64%和41.86%.经SAT系统处理后,溶解性有机物及各有机组分的三卤甲烷生成势减少,而三卤甲烷生成活性升高.疏水性有机酸是生成三卤甲烷的主要有机组分.亲水性有机物在SAT系统进水中的三卤甲烷生成活性较低,但由于含量高,三卤甲烷生成势也较大.而过渡亲水性有机酸由于含量和三卤甲烷生成活性较低,三卤甲烷生成势也较低.

Removal and Transformation of Dissolved Organic Matter During Groundwater Recharge Using Reclaimed Wastewater

The objective of this study was to investigate the removal and transformation of dissolved organic matter(DOM) through laboratory-scale soil aquifer treatment(SAT) soil columns.Using XAD resins,DOM was fractionated into 3 fractions: hydrophobic acid(HPO-A),transphilic acid(TPI-A) and hydrophilic fraction(HPI).Laboratory-scale SAT columns reduced about 58.64%,41.86% and 68.51% of HPO-A,TPI-A and HPI,respectively.All samples studied exhibited a common general relationship with respect trihalomethane formation potential(THMFP): HPO-A>HPI>TPI-A.Specific ultraviolet light absorbance(SUVA) and specific trihalomethane formation potential(STHMFP) values for various DOM fractions increased across the SAT columns.HPI exhibited greater increase in SUVA and STHMFP than HPO-A and TPI-A.The STHMFP of HPO-A was greater than that of corresponding TPI-A and HPI fractions in all samples.