Panda G C, Das S K, Bandopadhyay T S, Guha A K
Department of Biological Chemistry, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India.
Colloids Surf B Biointerfaces. 2007 Jun 15;57(2):135-42. doi: 10.1016/j.colsurfb.2007.01.022. Epub 2007 Feb 20.
Husk of Lathyrus sativus (HLS) has been found to be a good sorbent for the removal of nickel(II) from its aqueous solution. The adsorption process depends on pH of the solution with an optimum at 5.0, and follows Langmuir isotherm model (correlation coefficient 0.998). Initial adsorption rate is very fast and reaches equilibrium following pseudo-second order kinetics within 60 min. Amino, carboxyl, hydroxyl and phosphate groups of the biomass are involved in chemical interaction with nickel ions as revealed from SEM-EDX and FTIR studies. Chemical modifications of the functional groups of the biosorbent show that amino groups contribute largely (approximately 57%) for the binding of nickel ions and probably undergo chelation through dative bond formation. HLS biomass has been found to adsorb both nickel and cadmium equally from their mixed solution to the extent of approximately 70% indicating the importance of this sorbent in industrial effluent treatment.
已发现香豌豆壳（HLS）是从其水溶液中去除镍（II）的良好吸附剂。吸附过程取决于溶液的pH值，最佳pH值为5.0，并遵循朗缪尔等温线模型（相关系数0.998）。初始吸附速率非常快，并在60分钟内遵循准二级动力学达到平衡。扫描电子显微镜-能谱（SEM-EDX）和傅里叶变换红外光谱（FTIR）研究表明，生物质中的氨基、羧基、羟基和磷酸基团参与了与镍离子的化学相互作用。对生物吸附剂官能团的化学修饰表明，氨基对镍离子的结合贡献很大（约57%），可能通过形成配位键进行螯合。已发现HLS生物质能从混合溶液中同等程度地吸附镍和镉，吸附率约为70%，这表明这种吸附剂在工业废水处理中的重要性。
