Botany Department, Faculty of Science, Fayoum University, Fayoum, Egypt.
J Hazard Mater. 2011 Sep 15;192(3):1827-35. doi: 10.1016/j.jhazmat.2011.07.019. Epub 2011 Jul 12.
Biosorption is an effective process for the removal and recovery of heavy metal ions from aqueous solutions. The biomass of marine algae has been reported to have high biosorption capacities for a number of heavy metal ions. In this study, four species of red seaweeds Corallina mediterranea, Galaxaura oblongata, Jania rubens and Pterocladia capillacea were examined to remove Co(II), Cd(II), Cr(III) and Pb(II) ions from aqueous solution. The experimental parameters that affect the biosorption process such as pH, contact time and biomass dosage were studied. The maximum biosorption capacity of metal ions was 105.2mg/g at biomass dosage 10 g/L, pH 5 and contact time 60 min. The biosorption efficiency of algal biomass for the removal of heavy metal ions from industrial wastewater was evaluated for two successive cycles. Galaxaura oblongata biomass was relatively more efficient to remove metal ions with mean biosorption efficiency of 84%. This study demonstrated that these seaweeds constitute a promising, efficient, cheap and biodegradable sorbent biomaterial for lowering the heavy metal pollution in the environment.
生物吸附是一种从水溶液中去除和回收重金属离子的有效方法。海洋藻类的生物质已被报道对许多重金属离子具有高的生物吸附能力。在这项研究中，研究了四种红海藻类 Corallina mediterranea、Galaxaura oblongata、Jania rubens 和 Pterocladia capillacea，以去除水溶液中的 Co(II)、Cd(II)、Cr(III)和 Pb(II)离子。研究了影响生物吸附过程的实验参数，如 pH 值、接触时间和生物质剂量。在生物质剂量为 10 g/L、pH 值为 5 和接触时间为 60 min 的条件下，金属离子的最大生物吸附容量为 105.2mg/g。评价了藻类生物质对工业废水中重金属离子去除的两个连续循环的吸附效率。Galaxaura oblongata 生物质相对更有效地去除金属离子，平均生物吸附效率为 84%。这项研究表明，这些海藻构成了一种有前途的、高效的、廉价的和可生物降解的吸附生物材料，可降低环境中的重金属污染。
