摘要
通过模拟试验,考察了天然有机物的分子质量对地下水化学氧化除铁和混凝除铁的影响。结果表明:有机物的分子质量越大,对化学氧化除铁的阻碍越大,但对混凝除铁越有利。高锰酸钾去除有机铁最有效,自由氯的氧化除铁能力最差。当有机物的分子质量<4 ku时,可以用高锰酸钾氧化法去除有机铁;二氧化氯和自由氯氧化除铁仅在有机物分子质量<1 ku时有效。混凝除铁只适宜于有机物分子质量>10 ku的情形;预氧化混凝除铁可用于有机物分子质量>10 ku和有机物分子质量<2 ku的情形。
The effects of the molecular weight of natural organic matters on both oxidative and coagulation removals of iron from groundwater were researched through analogue experiments. The results show that the greater the molecular weight of organic matters, the higher the negative impact of natural organic matter on oxidative removal of iron but the higher the removal efficiency of iron during alum coagulation. Potassium permanganate is found to be the most effective oxidant of the three investigated oxidants. Free chlorine is the most ineffective method for removing complex iron. Soluble Fe （ 11 ） complexed by organic matters with molecular weight less than 4 ku is amenable to the removal by KMnQ oxidation. Chlorine dioxide and free chlorine are only effective for removing iron complexed by the organic matters with molecular weight less than 1 ku. Alum coagulation is effective for removing iron complexed by organic matters with molecular weight greater than 10 ku. Preoxidation followed by alum coagulation is effective for removal of iron complexed by organic matter with molecular weight greater than 10 ku and less than 2 ku.
出处
《中国给水排水》
CAS
CSCD
北大核心
2006年第13期59-62,66,共5页
China Water & Wastewater
基金
湖南省建设厅资助项目(20000201)
关键词
天然有机物
分子质量
除铁
化学氧化
混凝
natural organic matter
molecular weight
iron removal
chemical oxidation
coagulation
作者简介
马满英,电话：（0733）2623765 E-mail：2623765@163.com
