紫外活化过硫酸钠去除水体中的三氯卡班
发布时间：2018-09-06 11:47
【摘要】：采用紫外活化过硫酸钠(UV/PS)降解三氯卡班(TCC).考察了UV、PS和UV/PS联用工艺去除TCC的效果,研究了PS投加量、反应初始p H值和腐殖酸(HA)等因素对UV/PS降解TCC的影响,推测了UV/PS工艺中TCC可能的降解途径,并对比了UV/PS和UV/H2O2工艺对TCC的去除效果和经济性.研究表明:UV与PS联用能够高效去除TCC,其降解过程符合拟一级动力学模型(R~2≥0.95);拟一级反应速率常数k随着PS投加量的增加先增大再减小,在PS投加量为250μmol/L时,k达到最大值0.0810min~(-1);偏酸性条件(p H=6.0)有利于TCC的降解;HA对TCC的降解有抑制作用,抑制作用与HA的浓度呈正相关;GC/MS鉴定表明,TCC降解过程中主要的中间产物有异氰酸4-氯苯酯和对氯苯胺,其可能的降解途径为TCC分子结构中与酮羰基相连的C-N键断裂,脱氯,经过一系列的反应形成对氯苯胺和异氰酸4-氯苯酯;UV/PS降解TCC过程中溶液中脱氯反应导致Cl~-浓度增加;与UV/H_2O_2工艺相比,相同条件下UV/PS工艺中k值增大了96.65%,单位电能消耗量提高了97%.
[Abstract]:Degradation of (TCC). By UV activated sodium persulfate (UV/PS) The effects of PS dosage, initial pH value of reaction and humic acid (HA) on the degradation of TCC by UV,PS and UV/PS were investigated, and the possible degradation pathway of TCC in UV/PS process was deduced. The removal efficiency and economy of TCC by UV/PS and UV/H2O2 were compared. The results show that the degradation process of TCC, can be efficiently removed by the combination of 1: UV and PS. The degradation process accords with the pseudo-first-order kinetic model (R _ (2) 鈮，
本文编号：2226255
[Abstract]:Degradation of (TCC). By UV activated sodium persulfate (UV/PS) The effects of PS dosage, initial pH value of reaction and humic acid (HA) on the degradation of TCC by UV,PS and UV/PS were investigated, and the possible degradation pathway of TCC in UV/PS process was deduced. The removal efficiency and economy of TCC by UV/PS and UV/H2O2 were compared. The results show that the degradation process of TCC, can be efficiently removed by the combination of 1: UV and PS. The degradation process accords with the pseudo-first-order kinetic model (R _ (2) 鈮，
本文编号：2226255
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