两种褐藻对废水中铅、铜的吸附机理研究

Study on the Mechanism of Pb(Ⅱ) and Cu(Ⅱ) Biosorptionby Two Brown Algae

DOI：10.3969/j.issn.1673-1689.2012.01.007

中文关键词: 褐藻 生物吸附 重金属 平衡 动力学

英文关键词: brown algae biosorption heavy metal equilibrium kinetics

基金项目:国家自然科学基金项目(20977040)

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中文摘要:

运用批吸附技术研究了海带Laminaria japonica和裙带菜Undaria pinnatifida对水溶液中Pb2+、Cu2+的吸附特性。结果表明:硝酸钙预处理后,两种海藻对Cu2+的吸附容量降低28%左右,对Pb2+的吸附容量下降10%左右。用化学改性方法确定不同官能团对生物吸附的贡献,结果表明羧基对两种海藻吸附Pb2+的贡献大于胺基和羟基。共存阴离子影响海藻对Cu2+的吸附,CuCl2的吸附速率和吸附容量大于Cu(NO3)2和CuSO4。

英文摘要:

The ability to remove lead and copper from aqueous solution by brown algae Laminaria japonica and Undaria pinnatifida were investigated in this study.Results were drawn as follows:Pretreatment with Ca(NO3)2,the absorption capacity of two algae for Cu(Ⅱ) decreased by 28%,for Pb(Ⅱ) decreased by 10%.The contribution of functional groups in the biosorption process was confirmed by chemical modification of the groups.The functional group of carboxyl was mainly responsible for the adsorption of two algae investigated here towards Pb2+.The co-anion affect the absorption capacity.When copper chloride was used,higher qmax and k2 were observed as compared to the nitrates and the sulfate at the same pH.

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