| Fe/Cu催化还原降解饮用水中溴氯乙腈的性能研究 |
| 摘要点击 1572 全文点击 906 投稿时间：2015-01-12 修订日期：2015-03-08 |
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| 中文关键词 饮用水 消毒副产物 溴氯乙腈 Fe/Cu催化还原 动力学 |
| 英文关键词 drinking water disinfection by-products(DBPs) bromochloracetonitrile(BCAN) iron copper catalytic reduction kinetics |
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| 中文摘要 |
| 为了降低饮用水在氯消毒过程中产生的消毒副产物(DBPs)溴氯乙腈(BCAN)对人体带来的健康危害,采用Fe/Cu催化还原的方法降解饮用水中低浓度的BCAN,考察了BCAN的降解效果和其影响因素,探讨了其降解机制及动力学规律. 结果表明,Fe/Cu具有更强的还原降解BCAN的能力,与零价铁相比, Fe/Cu(质量比为10:1)的降解效率是其1.5倍. 随着Fe/Cu投加量的增加,BCAN的去除率有明显的提高,对于初始浓度为20μg·L-1的BCAN溶液,当Fe/Cu(质量比为10:1)投加量由5g·L-1增加到10g·L-1,反应150 min后,去除率由51.1%增加到89.5%. BCAN降解效率随着温度的升高逐渐提高,BCAN初始浓度的变化对Fe/Cu去除BCAN的去除效果影响不大,Fe/Cu降解BCAN符合一级反应动力学规律. |
| 英文摘要 |
| The paper used the method of iron copper catalyst reduction to degrade low concentrations of bromochloracetonitrile (BCAN) to lighten the damage to human being, which is a kind of disinfection by-products (DBPs) produced during the chlorination process of drinking water. The removal efficiency of BCAN and its influencing factors were investigated. The mechanism of degradation and kinetics were also explored. The results indicated that iron copper had a greater degradation ability towards BCAN, and the degradation rate of iron copper (mass ratio of 10:1) was 1.5 times that of the zero-valent iron. The removal of BCAN increased obviously with the increase of Fe/Cu dosage. When the initial concentration was set at 20 μg·L-1, after a reaction time of 150 min, removal of BCAN was improved from 51.1% to 89.5% with the increase of iron copper (mass ratio of 10:1) dosage from 5 g·L-1 to 10 g·L-1. The temperature also had great impact on BCAN removal and the removal increased with the increase of temperature. However, BCAN removal did not change a lot with the variation of the initial concentration of BCAN when it was at a low level. The BCAN degradation by iron copper catalytic reduction followed the first-order kinetics model. |
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