MIEX树脂对水库水中有机物的去除特性

Removal characteristic of organics in reservoir water by the MIEX~@ resin

为了充分发挥磁性离子交换树脂(MIEX@)对有机物的去除能力,利用烧杯试验研究了MIEX@树脂对水库水中有机物的去除特性,以溶解性有机物DOC、UV254、有机物三维荧光光谱(3DEEM)、有机物相对分子量分布、有机物分级特征和消毒副产物生成量等指标进行表征。结果表明:投加树脂15mL/L、反应20min时,DOC和UV254的去除率分别为58.4%和82.2%,三卤甲烷生成潜势(THM-FP)和卤乙酸生成潜势(HAAFP)的去除率分别为55.6%和82.1%。有机物相对分子量分布和分级特征测定结果表明:MIEX@树脂主要去除常规工艺无法有效去除的中小分子区间的亲水性和疏水性的有机物,从而可以有效控制消毒副产物的产生。有机物三维荧光光谱扫描结果表明:MIEX@树脂对芳香族蛋白Ⅱ(BOD5)、富里酸类物质和微生物代谢产物类有机物均有一定的去除能力,特别是芳香族蛋白Ⅱ和富里酸类物质。

Jar-tests were used to study the removal characteristic of organics by magnetic ion exchange resin（MIEX @） from reservoir water to find the maximum dissolve organic matter（DOC） removal rate by measuring DOC and UV254 concentrations using three-dimensional excitation emission matrix fluorescence spectroscopy（3DEEM）,molecular weights,fractionation and disinfection of by-products.The results show that the removal rates of DOC and UV254were 58.4%and 82.2% with a MIEX @ dosage of 15mL / L and contact time of 20min.The MIEX @ resin reduced THMFP（trihalomethanes formation potential） by 55.6% and HAAFP（haloacetic acids formation potential） by 82.1%.The MIEX @ resin effectively removes both hydrophobic and hydrophilic organics.The MIEX @ resin also effectively removed medium and low molecular weight organics,which then required more disinfection of the by-products.The 3DEEM scan results showed that aromatic proteins（BOD 5）,fulvic acid-like products and soluble microbial products could be removed by the MIEX @,especially the aromatic proteins and fulvic acid-like products.