Grimm A, Zanzi R, Björnbom E, Cukierman A L
Department of Chemical Engineering and Technology, Chemical Reaction Engineering, Royal Institute of Technology (KTH), S-100 44 Stockholm, Sweden.
Bioresour Technol. 2008 May;99(7):2559-65. doi: 10.1016/j.biortech.2007.04.036. Epub 2007 Jun 13.
Three biomass, birch wood Betula sp., marine brown alga Fucus vesiculosus, and terrestrial moss Pleurozium schreberi, have been compared as raw materials for preparation of biosorbents for removal of copper ions from diluted water solutions. Small sample doses (0.5 g/100ml) of the biosorbents prepared from alga and moss enabled more than 90% removal of Cu(II) ions from diluted water solutions (5-20mg/l). The sample from sawdust was less effective. A pseudo-second-order rate model properly described the experimental kinetic data for the biosorbents. The maximum sorption capacities (Xm) determined from the experimental equilibrium isotherms by applying the Langmuir model showed that the alga had the best copper-binding ability (Xm=23.4 mg/g), followed by the moss (Xm=11.1mg/g), and the sawdust (Xm=4.9 mg/g). No visible damages or performance losses were detected for the alga and moss after five sorption-desorption cycles using diluted HCl as eluent.
已对三种生物质——桦木（Betula sp.）、海洋褐藻墨角藻（Fucus vesiculosus）和陆生苔藓尖叶泥炭藓（Pleurozium schreberi）作为制备用于从稀释水溶液中去除铜离子的生物吸附剂的原材料进行了比较。由藻类和苔藓制备的生物吸附剂小剂量样品（0.5 g/100ml）能够从稀释水溶液（5 - 20mg/l）中去除90%以上的Cu(II)离子。木屑样品的效果较差。伪二级速率模型很好地描述了生物吸附剂的实验动力学数据。通过应用朗缪尔模型从实验平衡等温线确定的最大吸附容量（Xm）表明，藻类具有最佳的铜结合能力（Xm = 23.4 mg/g），其次是苔藓（Xm = 11.1mg/g），木屑（Xm = 4.9 mg/g）。使用稀盐酸作为洗脱剂进行五个吸附 - 解吸循环后，未检测到藻类和苔藓有明显损坏或性能损失。
