黑藻对含重金属废水中锌离子的吸附性能  

Adsorption of Zn^(2+) in Wastewater Containing Heavy Metal Ions by Hydrilla Verticillata

作　　者：黄灵芝[1,2] 曾光明[1] 黄丹莲[1] 李丽峰[2] 张玲[2] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]长沙理工大学化学与生物工程学院,湖南长沙410077

出　　处：《材料保护》2009年第3期81-83,共3页Materials Protection

基　　金：国家863高技术资助项目(No.2004AA649370);国家重点基础研究973发展计划资助项目(No.2005CB724203);国家杰出青年科学基金资助项目(No.50225926,50425927);湖南省教育厅基金资助项目(No.08C113)

摘　　要：黑藻能吸附重金属废水中的Zn2+,但对其的报道鲜见。研究了生物吸附剂黑藻对废水中Zn2+的吸附去除性能,考察了溶液pH值、Zn2+初始浓度、黑藻加入量和吸附时间对吸附效果的影响。同时通过EDX分析和等温吸附模型对黑藻吸附Zn2+的机理进行了研究。结果表明:在溶液pH值为6.0、黑藻加入量为2g/L,吸附时间为30min,Zn2+质量浓度为20mg/L的条件下,黑藻对Zn2+的吸附率为85%,并且发现黑藻对Zn2+的吸附是阳离子交换过程,吸附符合Langmuir,Freundlich和D-R等温吸附模型。The adsorption behavior of Zn2+ in wastewater containing heavy metal ions by hydrilla ver-ticillata was studied. The effects of pH value of the aqueous solu-tion,initial concentration of Zn2+ ,adsorbent dosage,and ad-sorption time on the adsorprive rate was investigated,and the ad-sorption mechanism was explored by making use of energy disper-sive X-ray analysis and isothermal adsorption experiment. Results show that at a pH value of 6.0,biosorbent dosage of 2 g/L,ad-sorption time of 30 min,and initial concentration of Zn2+ of 20 mg/L,the Zn 2+ in the wastewater could be removed up to a rate of 85%. Moreover,the adsorption of Zn2 + by hydrilla verticillata was dominated by anionic exchange,and the adsorption process could be well described using isothermal adsorption equations of Freundlich,Langmuir and D -R model.

关 键 词：废水处理 黑藻 锌离子 生物吸附 等温吸附模型 

分 类 号：X703[环境科学与工程—环境工程]