一种新型廉价吸附剂对低浓度氨氮的吸附特征研究  

Adsorption characteristics on ammonia nitrogen of a new low cost adsorbent

作　　者：陈金发[1] 

机构地区：[1]西昌学院农业科学学院,四川西昌615000

出　　处：《广东农业科学》2014年第3期185-188,193,共5页Guangdong Agricultural Sciences

基　　金：四川省科技厅应用基础研究项目(2013JY0131)

摘　　要：采用旱伞草为试验原料,通过简单的炭化处理工艺制取一种新型廉价的吸附剂.研究了炭化旱伞草在不同氨氮浓度下吸附时间、投加量、吸附温度、pH、粒径等因素对其去除效果的影响,并采用傅立叶红外光谱分析对该种吸附剂及吸附氨氮前后官能团的变化进行检测分析.结果表明：吸附剂制取的最佳炭化温度为450℃,炭化时间40 min;最佳工艺条件为吸附时间60 min,吸附剂投加量为1.50 g,吸附温度30℃,pH为6～8,旱伞草粒径为420～841μm.傅立叶红外光谱分析结果表明炭化后旱伞草中含有丰富的羟基和氨基,并与水中氨氮发生氧化反应,使氨氮得到去除.Adsorbent was prepared from Cyperus a!ternifolius as the raw material, and the removal effects of ammonia nitrogen adsorption time, dosage, adsorption temperature, pH and particle size in different concentrations of carbonized Cyperus alternifolius were studied. Fourier Transform Infrared was used to detect and analyze the variation of functional group before and after the treatments of ammonia nitrogen. The experimental results show that： with increasing carbonization time, carbonization temperature, ammonia nitrogen removal rate reached maximum of 100%. The optimum conditions were： the adsorption time 60 min, adsorbent dosage 1.50 g, adsorption temperature 30℃, pH 6-8 and water bamboo particle size 420-841 μm. The results of Fourier Transform Infrared showed that abundant hydroxyl radical and amino-groups were found in carbonized Cyperus alternifolius, which reacted with ammonia nitrogen in wastewater to remove it.

关 键 词：旱伞草 氨氮 吸附 炭化 

分 类 号：X703[环境科学与工程—环境工程]