Keskinkan O, Goksu M Z L, Basibuyuk M, Forster C F
Department of Environmental Engineering, Faculty of Engineering, Cukurova University, 01330 Balcali-Adana, Turkey.
Bioresour Technol. 2004 Apr;92(2):197-200. doi: 10.1016/j.biortech.2003.07.011.
Heavy metals can be adsorbed by living or non-living biomass. Submerged aquatic plants can be used for the removal of heavy metals. In this paper, lead, zinc, and copper adsorption properties of Ceratophyllum demersum (Coontail or hornwort) were investigated and results were compared with other aquatic submerged plants. Data obtained from the initial adsorption studies indicated that C. demersum was capable of removing lead, zinc, and copper from solution. The metal biosorption was fast and equilibrium was attained within 20 min. Data obtained from further batch studies conformed well to the Langmuir Model. Maximum adsorption capacities (q(max)) onto C. demersum were 6.17 mg/g for Cu(II), 13.98 mg/g for Zn(II) and 44.8 mg/g for Pb(II). Kinetics of adsorption of zinc, lead and copper were analysed and rate constants were derived for each metal. It was found that the overall adsorption process was best described by pseudo second-order kinetics. The results showed that this submerged aquatic plant C. demersum can be successfully used for heavy metal removal under dilute metal concentration.
重金属可被生物或非生物生物质吸附。沉水水生植物可用于去除重金属。本文研究了金鱼藻对铅、锌和铜的吸附特性，并将结果与其他沉水水生植物进行了比较。初始吸附研究获得的数据表明，金鱼藻能够从溶液中去除铅、锌和铜。金属生物吸附速度很快，20分钟内即可达到平衡。进一步的批次研究获得的数据与朗缪尔模型吻合良好。金鱼藻对铜（II）、锌（II）和铅（II）的最大吸附容量（q(max)）分别为6.17 mg/g、13.98 mg/g和44.8 mg/g。分析了锌、铅和铜的吸附动力学，并得出了每种金属的速率常数。结果发现，整个吸附过程用伪二级动力学描述最为合适。结果表明，这种沉水水生植物金鱼藻在稀金属浓度下可成功用于去除重金属。
