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| Cd adsorption factors in three typical soils in Jilin Province and its influencing factors |
| Received:July 01, 2018 |
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| KeyWord:Cd;adsorption;pH;Al3+ concentration;Ca2+ concentration;biochar |
| Author Name | Affiliation | E-mail | | YAN Ting-yu | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | MA Xiu-lan | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China
Tianjin Key Laboratory of Agro-Environment and Agro-Product, Tianjin 300011, China | 1974malan@163.com | | GU Fang-ning | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | ZHANG Jing | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | WANG Yu-jun | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China | jlndwangyujun@163.com | | HAN Xing | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China | | | FENG Jun | College of Resources and Environment Science, Jilin Agricultural University, Changchun 130118, China | |
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| Abstract: |
| 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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