| 氯化对二级处理出水中溶解性有机物结构的影响 |
| 摘要点击 2722 全文点击 1280 投稿时间：2007-04-20 修订日期：2007-07-28 |
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| 中文关键词 溶解性有机物 分级 三卤甲烷生成势 三卤甲烷生成活性 红外光谱 |
| 英文关键词 dissolved organic matter fractionation trihalomethane formation potential specific trihalomethane formation potential infrared spectra |
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| 中文摘要 |
| 以哈尔滨市W污水处理厂污水为研究对象，利用XAD树脂对二级处理出水中的溶解性有机物(DOM)进行分级分离.按照DOM在不同树脂上的吸附特性将其分为5个部分：疏水性有机酸(HPO-A)、疏水性中性有机物(HPO-N)、过渡亲水性有机酸(TPI-A)、过渡亲水性中性有机物(TPI-N)和亲水性有机物(HPI).考察了二级处理出水中有机组分的组成分布、三卤甲烷生成势、紫外光谱和红外光谱.结果表明，二级处理出水中的主要成分是HPO-A和HPI，两者含量之和达70.8%.HPO-A是加氯消毒时产生三卤甲烷的主要有机组分，其三卤甲烷生成活性(STHMFP)为232.9 μg/mg.而HPO-N、TPI-A、TPI-N和HPI的STHMFP介于100～125 μg/mg之间.氯化反应后，HPO-A、HPO-N、TPI-A和HPI的紫外-可见吸光度均降低，而TPI-N则相反.并且HPO-A、HPO-N、TPI-A和TPI-N中的O—H、CC和苯环的含量降低，而C—O的含量升高，还生成了CO和C—Cl. |
| 英文摘要 |
| Dissolved organic matter in the secondary effluent from the W wastewater treatment plant (Harbin) was fractionated using XAD resins into five fractions: hydrophobic acid (HPO-A), hydrophobic neutral (HPO-N), transphilic acid (TPI-A), transphilic neutral (TPI-N) and hydrophilic fraction (HPI). The distribution, trihalomethane formation potential (THMFP), UV_Vis and FTIR spectra of organic fractions in the secondary effluent were examined. XAD fractionation results showed that HPO-A and HPI dominated in the secondary effluent, collectively accounting for about 70.8%. HPO-A was the main precursors for THMFP following chlorination. HPO-A had the highest specific THMFP (STHMFP) and averaged 232.9 μg/mg. The STHMFP of HPO-N, TPI-A, TPI-N and HPI ranged from 100 μg/mg to 125 μg/mg. Chlorination resulted in increased UV_Vis absorbance for TPI-N and decreased UV_Vis absorbance for HPO-A, HPO-N, TPI-A and HPI. After chlorination, O—H,CC and aromatic ring were found to decrease while C—O was observed to increase for HPO-A, HPO-N, TPI-A and TPI-N. In addition,CO and C—Cl were found to occur as by-products from the chlorination reaction. |
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