School of Environment, Tsinghua University, Beijing 100084, China.
J Environ Sci (China). 2011;23(4):582-6. doi: 10.1016/s1001-0742(10)60423-8.
XAD-8 resin isolation of organic matter in water was used to divide organic matter into the hydrophobic and hydrophilic fractions. A pilot plant was used to investigate the change in both fractions during conventional and advanced treatment processes. The treatment of hydrophobic organics (HPO), rather than hydrophilic organicas (HPI), should carry greater emphasis due to HPO's higher trihalomethane formation potential (THMFP) and haloacetic acid formation potential (HAAFP). The removal of hydrophobic matter and its transmission into hydrophilic matter reduced ultimate DBP yield during the disinfection process. The results showed that sand filtration, ozonation, and biological activated carbon (BAC) filtration had distinct influences on the removal of both organic fractions. Additionally, the combination of processes changed the organic fraction proportions present during treatment. The use of ozonation and BAC maximized organic matter removal efficiency, especially for the hydrophobic fraction. In sum, the combination of pre-ozonation, conventional treatment, and O3-BAC removed 48% of dissolved organic carbon (DOC), 60% of HPO, 30% of HPI, 63% of THMFP, and 85% of HAAFP. The use of conventional treatment and O3-BAC without pre-ozonation had a comparable performance, removing 51% of DOC, 56% of HPO, 45% of HPI, 61% of THMFP, and 72% of HAAFP. The effectiveness of this analysis method indicated that resin isolation and fractionation should be standardized as an applicable test to help assess water treatment process efficiency.
XAD-8 树脂对水中有机物进行分离，将有机物分为疏水性和亲水性两部分。采用中试装置研究常规和深度处理工艺过程中两部分有机物的变化。由于疏水性有机物（HPO）具有更高的三卤甲烷生成潜能（THMFP）和卤乙酸生成潜能（HAAFP），因此应更加重视疏水性有机物（HPO）的去除，而不是亲水性有机物（HPI）。疏水性物质的去除及其向亲水性物质的转移，会降低消毒过程中最终的 DBPs 生成量。结果表明，砂滤、臭氧氧化和生物活性炭（BAC）过滤对两种有机分的去除均有明显影响。此外，组合工艺改变了处理过程中存在的有机分比例。臭氧氧化和 BAC 的联合使用提高了有机物去除效率，特别是对疏水性有机物。总的来说，预臭氧化、常规处理和 O3-BAC 的联合使用可去除 48%的溶解性有机碳（DOC）、60%的 HPO、30%的 HPI、63%的 THMFP 和 85%的 HAAFP。不进行预臭氧化而使用常规处理和 O3-BAC 的效果相当，可去除 51%的 DOC、56%的 HPO、45%的 HPI、61%的 THMFP 和 72%的 HAAFP。该分析方法的有效性表明，树脂分离和分馏应作为一种可行的测试方法标准化，以帮助评估水处理工艺的效率。
