高锰酸钾对水中天然有机物氯化活性的影响

Effects of Potassium Permanganate on Natural Organic Matter Chlorination Activity

利用树脂分离技术将水中天然有机物分为腐殖酸(HA)、富里酸(FA)、亲水酸(HPIA)和其它亲水物质(HPI-NA)等4部分,研究了高锰酸钾对不同有机组分卤代活性的影响.结果表明,高锰酸钾增加了腐殖酸和其它亲水物质加氯的卤代活性,降低了富里酸和亲水酸的卤代活性,如投加0.75 mg/L高锰酸钾时,腐殖酸和其它亲水物质的卤代活性增加了39.3%和13.8%,而富里酸和亲水酸卤代活性降低了33.6%和46.9%;通过对SUVA的考察可知,高锰酸钾增加了腐殖酸和其它亲水物质的碳碳不饱和双键的含量,使其卤代活性增加,而使富里酸和亲水酸的不饱和双键的含量降低,从而降低了其卤代活性;高锰酸钾与混凝相结合时,可以使腐殖酸、富里酸、亲水酸和其它亲水物质的三卤甲烷生成量较单独混凝时降低9.1、15.7、7.2和14.7个百分点.

Effects of potassium permanganate （PP） oxidation on natural organic matter（NOM） chlorination activity was studied in the article. Natural organic matter was separated into humic acid （HA）, fulvic acid（FA）, hydrophilic acid（HPIA） and non-hydrophilic acid （HPI-NA）fraction four fractions by XAD resin adsorption technique. Potassium permanganate oxidation alone increased HA and HPIA chlorination activity and decrease that of FA and HPI-NA. The chlorination activity of HA and HPIA were increased by 39.3% and 13.8% by 0.75 mg/L potassium permanganate, but the chlorination activity of FA and HPI-NA were decreased by 33.6% and 46.9%. SUVA results showed that potassium permanganate increase FA and HPIA unsaturated band contents, and decreased that of FA and HPI-NA. Compared with coagulation, potassium permanganate combined with coagulation can decrease the trihalomethanes of HA, FA, HPIA and HPI-NA by 9.1,15.7,7.2 and 14.7 per cent compared with that of coagulation alone.