改性沸石去除地下水中铁锰实验研究  

Experimental study on removal of manganese and ferrous ion in groundwater by modified zeolite

作　　者：叶春松[1] 曾惠明[1] 钱勤[1] 樊利华[1] 

机构地区：[1]武汉大学动力与机械学院水质科学与工程系,武汉430072

出　　处：《环境工程学报》2009年第7期1237-1240,共4页Chinese Journal of Environmental Engineering

摘　　要：测定了2种改性沸石的基本特性,并选取0.6 m层高的交换柱,通过动态试验,研究其分别用于除铁和除锰的工艺性能。实验结果表明,2种沸石质量全交换容量分别为578.2 mmol/kg和722.2 mmol/kg;产水水质均能达到饮用水标准:含铁量≤0.3 mg/L,含锰量≤0.1 mg/L;减少进水中铁锰含量(≤2 mg/L)和降低运行流速(≤20 m/h),都有利于提高工作交换容量,但流速对除铁沸石影响较小;再生剂为1 mol/L的NaC l,再生速率1 m/h条件下,每升除铁沸石再生剂用量为1.2 L,洗脱率(再生废液中目标离子含量与原水中过滤时的去除量之比)达0.95,比耗(再生剂用量与工作交换容量之比)为16,每升除锰沸石再生剂用量为1.6 L,洗脱率达0.8,比耗为16。Two kinds of modified zeolite were chosed to remove manganese and ferrous ion respectively,the basic parameters were analyzed, and processing property in a 0.6 m filler was studied. The results indicated that the total exchange capability of the zeolite for manganese ion removal was 578.2 mmol/kg, and that for ferrous ion removal was 722.2 mmol/kg. The quality of product water could meet the standard： concentration of total ferrous ion lower than 0. 3 mg/L and concentration of manganese ion lower than 0.1 mg/L, otherwise, lower concentration of aim ion in feed water （ ≤ 2 mg/L） and flow velocity （ ≤ 20 m/h） would promote the work exchange capacity, but the zeolite for ferrous ion removal was not affected by flow velocity obviously. The better regeneration agent for the two kinds of zeolite was 1 mol/L NaCl than HC1, when which flowed into the two reactors in a flow velocity of 1 m/h, the optimal dosage was 1.2 L and 1.6 L per liter modified zeolite, the cleaning rate （total quantity of aim ion in outflow in regeneration divided by removal quantity from feed water ） was 0.95 and 0. 8 respectively, and the consuming rate（consummation of regeneration of 1 L modified zeolite divided by work exchange capability） of it was 16.

关 键 词：除铁 除锰 改性沸石 工艺性能 

分 类 号：X703.1[环境科学与工程—环境工程]