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[1]马卫东,YU,Qiming,等.生物吸附剂对Hg2+ 的吸附动力学研究[J].应用与环境生物学报,2001,7(04):344-347.
 MA Weidong,et al..Study on Hg2+ adsorption kinetics of biosorbent made from marine alga Durvillaea potatorum[J].Chinese Journal of Applied & Environmental Biology,2001,7(04):344-347.
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生物吸附剂对Hg2+ 的吸附动力学研究()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
7卷
期数:
2001年04期
页码:
344-347
栏目:
综述
出版日期:
2001-08-25

文章信息/Info

Title:
Study on Hg2+ adsorption kinetics of biosorbent made from marine alga Durvillaea potatorum
作者:
马卫东YUQiming顾国维KAEWSARNPairat
Author(s):
MA Weidonget al.
( State Key Laboratory of Pollution Control and Resources Reuse, Tongji University, Shanghai200092, China) (1 School of Environmental Engineering, Griffith University, Nathan Campus, BrisbaneQLD4111, Australia)
关键词:
关键词 海洋巨藻(Durvillaea potatorum)重金属生物吸附汞离子 吸附动力学废水处理
Keywords:
Keywords marine alga (Durvillaea potatorum) biosorption of heavy metals Hg2+ adsorption kinetics wastewater treatment
摘要:
摘要 对经特殊的稳定化预处理所得的海洋巨藻(Durvillaea potatorum)生物吸附剂对Hg2+ 的吸附动力学进行了研究,报导了不同Hg2+初始浓度、温度以及生物吸附剂平均粒径下动态吸附量与时间的关系.结果显示,各吸附动力学曲线呈优惠型;当生物吸附剂平均粒径为0.45 mm时,Hg2+的半饱和时间tS均不超过60 min;Hg2+初始浓度和生物吸附剂粒径越小,吸附温度越大,达到吸附平衡所需的时间越短.在测试范围内,生物吸附剂的平衡吸附容量与粒径和温度无关. 同时考察了吸附过程中的传质效应并对液膜传质系数kL进行了关联,结果表明:当吸附时间t≤tS时,Hg2+ 的吸附速率为液膜传质控制;在测试范围内,kL为0.0407~0.112 cm/s.本研究结果为利用海洋巨藻(Durvillaea potatorum)生物吸附剂处理含汞废水的规模化应用提供了一定的依据. 图5 表2 参11
Abstract:
Abstract The adsorption kinetics of Hg2+ by a low-cost biosorbent made from marine alga Durvillaea potatorum was studied in this paper. The biosorbent was a pretreated biomass of D. potatorum with a particular process. The kinetic profiles at various conditions including effects of temperatures, initial Hg2+ concentrations and particle sizes were obtained. The results showed that the kinetics of adsorption were relatively fast, with semi-saturation time tS≤60 min for an average particle sizes of 0.45 mm. All particle size and temperature tests showed that the same equilibrium point was reached and less time was required for smaller particle size and higher temperature to reach the equilibrium. The equilibrium uptake capacities were independent of particle size and temperature. The mass transfer effect was investigated and the mass transfer coefficients kL were obtained by regression in this paper. It was found that Hg2+ adsorption rate of the biosorbent was controlled dominantly by liquid-membrane mass transfer rate when adsorbing time t≤tS. The mass transfer coefficients kL ranged from 0.0407 cm/s to 0.112 cm/s within the scope of the measurement. This study implied the feasibility of large-scale application for the treatment of Hg2+ bearing industrial wastewater by the biosorbent from marine alga Durvillaea potatorum. Fig 5, Tab 2, Re11
更新日期/Last Update: 2002-10-31