Selective reinforced competitive biosorption of Ag (I) and Cu (II) on Magnetospirillum gryphiswaldense
Selective reinforced competitive biosorption of Ag (I) and Cu (II) on Magnetospirillum gryphiswaldense
复制标题
Ag (I) 和 Cu (II) 在 Magnetospirillum gryphiswaldense 上的选择性强化竞争性生物吸附
DOI：
10.1016/j.desal.2010.11.053
复制
发表时间：
2011-04
期刊：
影响因子：
9.9
通讯作者：
Gong, Chunmei
中科院分区：
文献类型：
--
作者：
Wang, Yanhong;Gao, Hong;Sun, Jinsheng;Li, Jing;Su, Yanxia;Ji, Yulan;Gong, Chunmei
本文主要研究银(I)和铜（II）的竞争性生物吸附，首先观察了gryphiswaldense磁螺旋藻（Magnetospirillum gryphiswaldense, MSR-1）对单个离子的生物吸附，为后续二元离子体系的选择性强化过程提供参考。在单一离子体系的对照试验中，证实了未处理的细胞比预处理的细胞具有更好的生物吸附能力，并通过实验筛选和确定了最佳生物吸附条件。此外，在最佳条件下获得了饱和吸附量。上述生物吸附数据用Langmuir等温线和拟二级动力学模型完美描述。在二元离子生物吸附中，与上述对照试验相比，Cu （II）促进了Ag (I)的吸附，而Cu （II）本身的吸附则相应降低或抑制。这一现象表明MSR-1在Cu （II）的“催化”下成为水溶液中Ag (I)的强生物吸附剂。建立了一种新的Cu （II）生物吸附等温线模型，该模型比常用的Langmuir或Freundlich模型更适合于这种情况下Cu （II）的抑制吸附行为，并且在二元情况下仍然适用于Ag (I)。
Probing competitive biosorption of Ag (I) and Cu (II), the main concern of this paper, was started with observing individual ion biosorptions on Magnetospirillum gryphiswaldense (MSR-1), for reference to the succeeding selective reinforced processes in binary ion systems. In the control test of unitary ion systems, unsettled cells were substantiated to have better biosorption capacity than pretreated ones and optimum biosorptive conditions screened and defined experimentally. In addition, saturated extents of adsorption were obtained under the optimum conditions. The biosorptive data hereinabove were perfectly described by Langmuir isotherm and pseudo-second-order kinetic model. In binary ion biosorption, Cu (II) was observed to promote the adsorption of Ag (I) compared with that in the above control tests, with that of Cu (II) itself reduced or inhibited correspondingly. This phenomenon indicates that MSR-1 becomes a stronger biosorbent for Ag (I) in aqueous solution under the “catalysis” of Cu (II). A new Cu (II) biosorption isotherm model was worked out, which was more suitable for the inhibited Cu (II) adsorption behavior in this case than the frequently used Langmuir or Freundlich models, which is still valid for Ag (I) in the binary case.
登录
查看更多内容
影响因子：
11.4
作者：
Juan Mao;S. Won;K. Vijayaraghavan;Y. Yun
通讯作者：
Juan Mao;S. Won;K. Vijayaraghavan;Y. Yun
影响因子：
1.5
作者：
G. Yan;T. Viraraghavan
通讯作者：
G. Yan;T. Viraraghavan
影响因子：
11.4
作者：
Kapoor, A;Viraraghavan, T;Cullimore, DR
通讯作者：
Cullimore, DR
影响因子：
16
作者：
K. Rezaei;F. Temelli;E. Jenab
通讯作者：
K. Rezaei;F. Temelli;E. Jenab
影响因子：
11.4
作者：
Akar, Tamer;Tunali, Sibel
通讯作者：
Tunali, Sibel