作　　者： ; ; (周小玲）; (阮孟勇）; (肖卓群）; (李铭红）;

机构地区： 浙江师范大学化学与生命科学学院

出　　处： 《环境科学学报》 2014年第10期2514-2519,共6页

摘　　要： 以溶解有机碳为5 mg·L-1的色氨酸溶液为研究对象,探索氯和氯胺消毒时,不同影响因子对亚硝氮在三氯硝基甲烷(TCNM)形成中的作用,从而识别其关键消毒因子.结果表明:NO-2的加入对TCNM的形成有明显的促进作用.对氯消毒来说,NO-2对TCNM形成的促进作用在酸性条件下(TCNM增量为11.82μg·L-1)比碱性条件下(TCNM增量为2.66μg·L-1)更为明显;而对于氯胺,却在中碱性条件下较为明显(pH=5,6,7,8,9,TCNM的增量分别为0.04、0.11、0.50、0.34、0.27μg·L-1).但不管是氯消毒还是氯胺消毒,NO-2对TCNM形成的促进作用基本随着消毒剂量、反应时间的增加而增加.由极差分析得知,氯、氯胺消毒下影响NO-2对TCNM形成的关键的因子均是pH值. This study investigated the effects of nitrite on the formation of trichloronitromethane(TCNM) upon chlorination /chloramination of tryptophan solution(DOC = 5 mg·L-1).The results showed that nitrite ion promoted the formation of TCNM obviously.In chlorination,the promotion of TCNM formation in acid condition(the increase amount of TCNM reached 11.82 μg·L-1) was more significant than in alkaline condition(the increase amount of TCNM reached 2.66 μg·L-1);yet opposite was true for chloramination(the increase amount of TCNM in pH 5,6,7,8,9 was 0.04,0.11,0.50,0.34 μg·L-1and 0.27 μg·L-1,respectively).However,the facilitation of TCNM formation from nitrite addition increased with the chlorine/chloramine dose and reaction time for both chlorination or chloramination.Range analysis also revealed that for tryptophan solution,the key factor for nitrite in promoting TCNM formation in chlorination / chloramination test was pH value.

关 键 词： 亚硝氮 氯 一氯胺 色氨酸 卤代硝基甲烷

领　　域： [环境科学与工程]