| 颜廷玉,马秀兰,顾芳宁,张婧,王玉军,韩兴,冯君.Cd在吉林省3种典型土壤上的吸附及其影响因素研究[J].农业环境科学学报,2019,38(4):827-834. |
| Cd在吉林省3种典型土壤上的吸附及其影响因素研究 |
| Cd adsorption factors in three typical soils in Jilin Province and its influencing factors |
| 投稿时间：2018-07-01 |
| DOI：10.11654/jaes.2018-0847 |
| 中文关键词: Cd 吸附 pH Al3+浓度 Ca2+浓度 生物质炭 |
| 英文关键词: Cd adsorption pH Al3+ concentration Ca2+ concentration biochar |
| 基金项目:国家重点研发计划项目（2016YFC0501201）；吉林省自然科学基金项目（20180101086JC）；吉林省科技发展计划项目（20170204002SF） |
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| 中文摘要: |
| 为了解Cd在不同土壤类型中的吸附特性，通过批量平衡吸附试验，探究了重金属Cd在吉林省盐碱土、黑土和白浆土3种典型土壤中的吸附行为及不同影响因素对Cd吸附特性的影响。结果表明：Cd在3种土壤中的吸附过程用Langmuir模型拟合最优，且对Cd的最大吸附量顺序为盐碱土 > 黑土 > 白浆土；与准一级动力学方程相比，准二级动力学方程对3种土壤吸附Cd的拟合效果更好，说明3种土壤对Cd的吸附过程是多重吸附共同作用的结果；Cd在3种土壤中的吸附均为自发、吸热和无序反应；在试验pH范围内（3.0~11.0），3种土壤对Cd的吸附量呈现先增加后趋于平衡的趋势；Al3+和Ca2+浓度的增加均使3种土壤对Cd的吸附量减少；添加生物质炭后3种土壤对Cd的吸附量增加。 |
| 英文摘要: |
| In order to determine the adsorption characteristics of Cd and the various influencing factors in different soils, mass equilibrium adsorption experiments were conducted in saline-alkali soil, black soil, and planosol. The results indicated that the Langmuir model explained adsorption in the three types of soils. Maximum Cd adsorption occurred in saline-alkali soil, followed by black soil then planosol. The pseudo-second-order kinetic equation had a better fitting effect than the pseudo-first-order kinetic equation for Cd adsorption in the three soils. Cd adsorption in the soils was spontaneous, endothermic, and random. Within a pH range of 3.0~11.0, Cd adsorption in the three soils first increased then became more stable. By increasing the concentration of Al3+ and Ca2+, Cd adsorption decreased in the soils whereas adding biomass charcoal increased Cd absorption. These results can be used to understand the adsorption behavior of Cd in different soils and provide a theoretical basis for Cd-contaminated soil remediation. |
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