Binding and Adsorption Energies of Heavy Metal Ions with Hapli-Udic Argosol and Ferri-Udic Argosol Particles

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Binding and Adsorption Energies of Heavy Metal Ions with Hapli-Udic Argosol and Ferri-Udic Argosol Particles

机译：重金属离子与Hapli-Udic Argossol和Ferri-Udic Argossol粒子的结合和吸附能

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Gibbs free binding energy and adsorption energy between cations and charged soil particles were used to evaluate the interactions between ions and soil particles. The distribution of Gibbs free adsorption energies could not be determined experimentally before the development of Wien effect measurements in dilute soil suspensions. In the current study, energy relationships between heavy metal ions and particles of Hapli-Udic Argosol (Alfisol) and Ferri-Udic Argosol were inferred from Wien effect measurements in dilute suspensions of homoionic soil particles (＜ 2 μm) of the two soils, which were saturated with ions of five heavy metals, in deionized water. The mean Gibbs free binding energies of the heavy metal ions with Hapli-Udic Argosol and Ferri-Udic Argosol particles diminished in the order of Pb2+＞Cd2+＞Cu2+＞ Zn2+ ＞Cr3+, where the range of binding energies for Hapli-Udic Argosol (7.25-9.32 kJ mol-1) was similar to that for Ferri-Udic Argosol (7.43-9.35 kJ mol-1). The electrical field-dependent mean Gibbs free adsorption energies of these heavy metal ions for Hapli-Udic Argosol and for Ferri-Udic Argosol descended in the order: Cu2+≥ Cd2+≥ Pb2+ ＞ Zn2+＞Cr3+,and Cd2+ ＞Cu2+＞Pb2+＞Zn2+＞Cr3+, respectively. The mean Gibbs free adsorption energies of Cu2+, Zn2+, Cd2+,Pb2+, and Cr3+ at a field strength of 200 kV cm-1, for example, were in the range of 0.8-3.2 kJ mol-1 for the two soils.

机译：阳离子与带电土壤颗粒之间的吉布斯自由结合能和吸附能用于评估离子与土壤颗粒之间的相互作用。在发展稀土壤悬浮液中的维恩效应测量之前，无法通过实验确定吉布斯自由吸附能的分布。在当前的研究中，重金属离子与Hapli-Udic Argosol（Alfisol）和Ferri-Udic Argosol颗粒之间的能量关系是根据Wien效应在两种土壤的同质土壤颗粒（＜2μm）的稀悬浮液中的推断得出的在去离子水中用五种重金属离子饱和。重金属离子与Hapli-Udic Argosol和Ferri-Udic Argosol粒子的平均吉布斯自由结合能按Pb2 +＞ Cd2 +＞ Cu2 +＞ Zn2 +＞ Cr3 +的顺序减小，其中Hapli-Udic Argosol的结合能范围为（7.25 -9.32 kJ mol-1）与Ferri-Udic Argosol（7.43-9.35 kJ mol-1）相似。这些重金属离子对Hapli-Udic Argosol和Ferri-Udic Argosol的电场相关平均吉布斯自由吸附能的排列顺序为：Cu2 +≥Cd2 +≥Pb2 +＞ Zn2 +＞ Cr3 +，Cd2 +＞ Cu2 +＞ Pb2 +＞ Zn2 + Cr3 +。对于两种土壤，例如在200 kV cm-1的场强下，Cu2 +，Zn2 +，Cd2 +，Pb2 +和Cr3 +的平均吉布斯自由吸附能在0.8-3.2 kJ mol-1的范围内。

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《土壤圈（英文版）》 |2007年第6期|688-696|共9页
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作者单位

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

College of Resource and Environment, Nanjing Agricultural University, Nanjing 210095 China;

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

Institute of Soil Science, the Chinese Academy of Sciences, P.O. Box 821, Nanjing 210008 China;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
adsorption energy, Argosol, binding energy, heavy metal ion, Wien effect;

机译：吸附能Argosol结合能重金属离子维恩效应;
入库时间 2022-08-19 04:04:16

Binding and Adsorption Energies of Heavy Metal Ions with Hapli-Udic Argosol and Ferri-Udic Argosol Particles

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