Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Broadway, NSW 2007, Australia.
Bioresour Technol. 2014 May;160:98-106. doi: 10.1016/j.biortech.2013.12.038. Epub 2013 Dec 19.
A novel multi-metal binding biosorbent (MMBB) was developed by combining a group of three from the selective natural lignocellulosic agro-industrial wastes for effectively eliminating lead, cadmium, copper and zinc from aqueous solutions. Four MMBBs with different combinations (MMBB1: tea waste, corncob, sugarcane bagasse; MMBB2: tea waste, corncob and sawdust; MMBB3: tea waste, corncob and apple peel; MMBB4: tea waste, corncob and grape stalk) were evaluated. FTIR analysis for characterizing the MMBB2 explored that the MMBB2 contains more functional groups available for multi-metals binding. Comparing among the MMBBs as well as the single group biosorbents, MMBB2 was the best biosorbent with the maximum biosorption capacities of 41.48, 39.48, 94.00 and 27.23 mg/g for Cd(II), Cu(II), Pb(II) and Zn(II), respectively. After 5 times of desorption with CaCl2, CH3COOH and NaCl as eluent, the MMBB2 still remained excellent biosorptive capacity, so as it could be well regenerated for reuse and possible recovery of metals.
一种新型的多金属结合生物吸附剂（MMBB）是通过将三种具有选择性的天然木质纤维素农业工业废物组合而成的，可有效去除水溶液中的铅、镉、铜和锌。评估了具有不同组合的四种 MMBB（MMBB1：茶废料、玉米芯、甘蔗渣；MMBB2：茶废料、玉米芯和木屑；MMBB3：茶废料、玉米芯和苹果皮；MMBB4：茶废料、玉米芯和葡萄梗）。通过 FTIR 分析对 MMBB2 进行表征，发现 MMBB2 含有更多的功能基团，可用于多金属结合。与 MMBB 以及单一生物质吸附剂相比，MMBB2 是最好的生物吸附剂，对 Cd(II)、Cu(II)、Pb(II) 和 Zn(II)的最大生物吸附容量分别为 41.48、39.48、94.00 和 27.23mg/g。用 CaCl2、CH3COOH 和 NaCl 作为洗脱剂进行 5 次解吸后，MMBB2 仍然保持优异的生物吸附能力，因此可以很好地再生，用于重复使用和可能的金属回收。
