| 海水淡化超滤-反渗透工艺沿程溴代消毒副产物变化规律 |
| 摘要点击 3397 全文点击 1798 投稿时间：2015-04-20 修订日期：2015-05-24 |
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| 中文关键词 海水淡化 反渗透 有机物 溴代消毒副产物 抗雌激素活性 |
| 英文关键词 seawater desalination reverse osmosis organic matter brominated disinfection by-products antiestrogenic activity |
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| 中文摘要 |
| 研究了海水淡化超滤-反渗透(UF-RO)工艺沿程有机物和溴代消毒副产物(Br-DBPs)变化特征. 该海水中含有较高浓度的Br-(45.6~50.9 mg·L-1)和较多的芳香类化合物[比紫外吸收值SUVA为3.6~6.0 L·(mg·m)-1];色氨酸类芳香族蛋白质、富里酸类有机物和溶解性微生物代谢产物是海水中主要的荧光特征有机物. UF-RO工艺进水海水经NaClO消毒后,DBPs的种类和浓度显著增加,且增加的主要为Br-DBPs,其中三溴甲烷(CHBr3)占总三卤甲烷(THMs)的70.48%~91.50%,二溴乙酸(Br2CHCO2H)占总卤乙酸(HAAs)的81.14%~100%,二溴乙腈(C2HBr2N)占总卤乙腈(HANs)的83.77%~87.45%. UF膜对 THMs、HAAs和HANs的去除率分别 为36.63%~40.39%、73.83%~95.38%和100%. RO膜可以完全去除 HAAs,但是对 THMs不能完全去除. 进水海水的抗雌激素活性为0.35~0.44 mg·L-1,氯消毒后增加了32%~69%. 海水淡化UF-RO系统生成的DBPs和其他生物毒性物质最终被截留到了UF浓水和RO浓水中. |
| 英文摘要 |
| The characteristics of dissolved organic matter (DOM) and brominated disinfection by-products (Br-DBPs) during a seawater desalination ultrafiltration (UF) combined reverse osmosis (RO) process were studied.The seawater contained high level of bromide ion (45.6-50.9 mg·L-1) and aromatic compounds with specific ultraviolet absorbance (SUVA) of 3.6-6.0 L·(mg·m)-1.The tryptophan-like aromatic protein, fulvic acid-like and soluble microbial by-product-like were the main fluorescent DOM in the seawater.After pre-chlorination of the seawater, the concentrations of DBPs was significantly increased in the influent of UF, which was dominantly the Br-DBPs.Bromoform (CHBr3) accounted for 70.48%-91.50% of total trihalomethanes (THMs), dibromoacetic acid (Br2CHCO2H) occupied 81.14%-100% of total haloacetic acids (HAAs) and dibromoacetonitrile (C2HBr2N) occupied 83.77%-87.45% of total haloacetonitriles (HANs).The removal efficiency of THMs, HAAs and HANs by the UF membrane was 36.63%-40.39%, 73.83%-95.38% and 100%, respectively.The RO membrane could completely remove the HAAs, while a little of the THMs was penetrated.The antiestrogenic activity in the seawater was 0.35-0.44 mg·L-1, which was increased 32%-69% after the pre-chlorination.The DBPs and other bio-toxic organics which formed during the UF-RO process were finally concentrated in the UF concentrate and RO concentrate. |
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