生物吸附剂Bio-matrix去除废水中重金属的研究

Heavy Metal Removal by Bio-matrix Biosorbent

[目的]研究生物吸附剂Bio-matrix对常规重金属Cu^(2+)、Ni^(2+)、Cr^(3+)的吸附性能。[方法]考察不同温度、吸附剂投加量、吸附时间、p H对吸附量的影响,并分析了Bio-matrix对Cu^(2+)的等温吸附情况。[结果]Bio-matrix吸附剂对Cu^(2+)的吸附效果优于Ni^(2+)和Cr^(3+),温度对吸附量影响较小,3 h可达到吸附平衡,单位吸附量随p H的升高先增大后减小,在p H 4左右时对重金属的单位吸附量最大,Bio-matrix对Cu^(2+)的吸附等温线与Freundlich方程有较好的拟合性,饱和吸附量为19.3 mg/g。[结论]该研究为Bio-matrix作为生物吸附剂去除废水中重金属提供了可行途径。

Objective] To research the adsorption performance of biosorbent Bio-matrix on conventional heavy metal Cu , Ni 2 ＋ and Cr . [Method] Effects of pH, temperature, biosorbent dosage and adsorption time on adsorbing capacity were researched, isothermal adsorption of Bio-matrix to Cu 2 ＋ was analyzed.[Result] Bio-matrix had better adsorption effects to Cu 2 ＋ than Ni 2 ＋ and Cr 3 ＋.Unit adsorption capacity firstly enhanced and then decreased with pH, and reached the maximum at pH 4.The adsorption isotherm of Cu 2 ＋ had better fitting with the Freundlich equation, and the saturated adsorption capacity was 19.3 mg /g.[Conclusion] This research provides feasible way for the heavy metal removal by Bio-matrix biosorbent.