热活化过硫酸钠耦合甲酸技术研究——处理水溶液中四氯化碳与六价铬污染
发布时间：2019-05-30 04:17
【摘要】：以甲酸为活化剂,耦合热活化过硫酸钠技术产生还原性二氧化碳阴离子自由基(CO_2~-),从而还原去除水溶液中四氯化碳(CT)和Cr(Ⅵ),考察过硫酸钠和甲酸初始浓度的影响以及复合污染处理效果.结果表明:当过硫酸钠与甲酸浓度均为100mmol/L时,单独CT或Cr(Ⅵ)分别在120min、60min内基本完全去除(50℃),且污染物去除效率随过硫酸钠及甲酸浓度升高而增强.在CT和Cr(Ⅵ)复合污染体系中,Cr(Ⅵ)的存在能够抑制CT降解,且抑制程度随Cr(Ⅵ)初始浓度升高而提高,但Cr(Ⅵ)去除率随CT初始浓度增大而升高.加入CO_2~-猝灭剂(甲基紫精)能够抑制CT降解,但促进Cr(Ⅵ)去除,表明有机物的存在能够增强Cr(Ⅵ)去除效率.
[Abstract]:Using formic acid as activating agent, sodium persulfate was coupled to produce reductive carbon dioxide anion radical (CO_2~-), thus reducing and removing carbon tetrachloride (CT) and Cr (VI) from aqueous solution. The effect of initial concentration of sodium persulfate and formic acid and the effect of compound pollution treatment were investigated. The results showed that when the concentrations of sodium persulfate and formic acid were both 100mmol/L, CT or Cr (VI) were completely removed (50 鈩，
本文编号：2488512
[Abstract]:Using formic acid as activating agent, sodium persulfate was coupled to produce reductive carbon dioxide anion radical (CO_2~-), thus reducing and removing carbon tetrachloride (CT) and Cr (VI) from aqueous solution. The effect of initial concentration of sodium persulfate and formic acid and the effect of compound pollution treatment were investigated. The results showed that when the concentrations of sodium persulfate and formic acid were both 100mmol/L, CT or Cr (VI) were completely removed (50 鈩，
本文编号：2488512
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