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Fe3+和Cu2+对饮用水氯消毒副产物三卤甲烷形成的影响
引用本文:孙涛, 员建, 仝重臣, 温海涛. Fe3+和Cu2+对饮用水氯消毒副产物三卤甲烷形成的影响[J]. 环境工程学报, 2015, 9(4): 1849-1855. doi: 10.12030/j.cjee.20150453
作者姓名:孙涛  员建  仝重臣  温海涛
作者单位:1. 天津城建大学环境与市政工程学院, 天津 300384; 2. 天津市水质科学与技术重点实验室, 天津 300384
基金项目:天津市自然科学基金资助项目(12JCYBJC14800) 住房和城乡建设部研究开发项目(2012-k7-20) 天津市建委科技项目(2009-20)
摘    要:为了研究水中存在Br-的情况下,Fe3+和Cu2+对三卤甲烷(THMs)的生成及CHCl3、CHBrCl2、CHBr2Cl、CHBr3 4种消毒副产物相对分布的影响,以腐殖酸模拟氯消毒过程中的前体物进行实验。结果表明,在pH为6、7和9 3种条件下,Fe3+抑制了THMs的生成,pH=6时只有CHCl3生成量随着Fe3+浓度的增加逐渐减少,其余3种消毒副产物均在增加,pH=7时4种消毒副产物浓度均减小并在Fe3+浓度为2 mg/L时生成量最低,pH=9时的生成趋势与pH=6时类似。Cu2+能促进THMs的生成,在pH为6、7和9时,当加入0.5 mg/L Cu2+时,THMs总量分别增加了16.7%、22.6%和2.5%,随着pH增加,THMs总量增加。在3种pH环境中,Cu2+对THMs生成的影响大于Fe3+,在偏酸性环境中,Fe3+影响THMs生成,产生的致癌风险高,当金属离子浓度为2.5 mg/L时,致癌风险相差最高为15%,在中性和偏碱性环境中,Cu2+影响THMs生成,产生的致癌风险高。

关 键 词:氯消毒副产物   三卤甲烷   Fe3+   Cu2+   Br-
收稿时间:2014-05-11

Effects of Fe3+ and Cu2+ on formation of THMs during disinfection of drinking water by chlorine
Sun Tao, Yuan Jian, Tong Zhongchen, Wen Haitao. Effects of Fe3+ and Cu2+ on formation of THMs during disinfection of drinking water by chlorine[J]. Chinese Journal of Environmental Engineering, 2015, 9(4): 1849-1855. doi: 10.12030/j.cjee.20150453
Authors:Sun Tao  Yuan Jian  Tong Zhongchen  Wen Haitao
Affiliation:1. School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China; 2. Tianjin Key Laboratory of Aquatic Science and Technology, Tianjin 300384, China
Abstract:Effects of ferric and copper ions on the formation and distribution of(THMs) such as CHCl3,CHBrCl2,CHBr2,and CHBr3 were investigated in the presence of bromide ion.Humic acid was used as disinfection by-product(DBP) model precursors and a series of experiments were conducted.The results showed that Fe3+ inhibited the formation of THMs when pH values were 6,7,and 9.Only the production of CHCl3 decreased,while the other three DBPs increased with the increasing of Fe3+ when pH was 6.Four kinds of THMs decreased with Fe3+ increased when pH was 7.The generate trends were similar when pH values of 6 and 9.Cu2+ can promote the formation of THMs.When 0.5mg/L Cu2+ was added to solution while pH values of 6,7 and 9,THMs increased by 16.7%,22.6% and 2.5%,respectively.The impact of Cu2+ on THMs was larger than Fe3+.Cancer risk of THMs in drinking water was high when pH was 6 in the presence of Fe3+.Effect of Cu2+ on cancer risk in drinking water was higher than Fe3+when pH values were 7 and 9.
Keywords:chlorine disinfection by-products  THMs  ferric ion  copper ion  bromide ion
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