| 海水淡化低温多效蒸馏工艺(LT-MED)沿程溴代消毒副产物的生成 |
| 摘要点击 1514 全文点击 495 投稿时间：2016-12-06 修订日期：2017-01-13 |
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| 中文关键词 海水淡化 低温多效蒸馏(LT-MED) 氯消毒 溶解性有机物 溴代消毒副产物 |
| 英文关键词 seawater desalination low temperature multi-effect distillation (LT-MED) chlorination dissolved organic matter brominated disinfection by-products |
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| 中文摘要 |
| 研究了海水淡化低温多效蒸馏（LT-MED）工艺沿程水质和溴代消毒副产物（Br-DBPs）变化特征.LT-MED工艺进水海水的Br-浓度和比紫外吸收值（SUVA）分别为54.6 mg·L-1和1.7 L·（mg·m）-1，其荧光特征有机物主要有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.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，三溴甲烷（CHBr3）占总三卤甲烷（THMs）的100%；一溴乙酸（C2H3BrO2）和二溴乙酸（C2H2Br2O2）分别占总卤乙酸（HAAs）的31.9%和68.1%；四溴苯酚（C6H5BrO）占总卤代酚（HPs）的100%.LT-MED海水淡化产品水中THMs、HAAs和HPs均未检出，但是其浓水中的THMs、HAAs和HPs浓度分别为56.9、35.0和0.1 μg·L-1. |
| 英文摘要 |
| Changes in water quality and brominated disinfection by-products (Br-DBPs) during a low temperature multi-effect distillation (LT-MED) process for seawater desalination were investigated. The concentrations of bromide ion and specific ultraviolet absorbance (SUVA) in the seawater (i.e. the influent of LT-MED) were 54.6 mg·L-1 and 1.7 L·(mg·m)-1, respectively. The tryptophan-like aromatic protein, fulvic acid-like and soluble microbial by-product-like organics dominated the fluorescent dissolved organic matter (DOM) in the seawater. After the NaClO pre-chlorination in the LT-MED process, the concentrations of DBPs in the seawater were significantly increased, especially Br-DBPs, and Bromoform(CHBr3) accounted for 100% of total trihalomethanes (THMs), Bromoacetic acid (C2H3BrO2) and dibromoacetic acid (C2H2Br2O2) accounted for 31.9% and 68.1%, respectively of total haloacetic acids (HAAs), while 4-Bromophenol (C6H5BrO) accounted for 100% of total halogenated phenols (HPs). The formation of THMs, HAAs and HPs was not detected in the finishing water produced by the LT-MED desalination process, but these substances were retained in the concentrated brine, of which THMs, HAAs and HPs were 56.9, 35.0 and 0.1 μg·L-1. |
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