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- Title
毛豆壳生物炭的活化及其对甲萘威的吸附性能.
- Authors
韩静; 朱依婷; 郑驰; 马莉红; 张亚男; 曾秋艳; 刘书亮; 陈姝娟
- Abstract
In order to provide theoretical basis and technical support for the utilization of soybean shell and the control of environmental pollution of carbaryl, KOH was used as activator to optimize the preparation conditions of soybean shell activated biochar (A-SBC). The effects of different systems on the adsorption capacity of A-SBC for carbaryl were studied. The adsorption kinetics and adsorption thermodynamics of carbaryl by A-SBC were analyzed. The results showed that the A-SBC obtained by pre-carbonizing the soybean shell at 700 ℃ for 1 h, mixed with KOH at a mass ratio of 1∶2.0, and activation at 750 ℃ for 1.5 h exhibited the best adsorption performance for carbaryl. The adsorption rate and adsorption capacity were 89.63% and 113.28 mg·g-1, respectively. After activation, the surface of A-SBC was concave, the pores were dense, and the organic functional groups wre reduced. When the pH of the system was 2.0-6.5, the adsorption performance of A-SBC was good, and the maximum adsorption capacity was recorded at the pH value of 5.5. The adsorption capaticy increased with the elevated temperature. The maximium adsorption capacity was found when the ionic strength (NaCl) was 0.01 mol·L-1. The adsorption of carbaryl by A-SBC was more consistent with the quasi second-order dynamic model. The isothermal adsorption curve was more suitable to be fitted by Langmuir equation, which indicated that this process was mainly chemical adsorption. Thermodynamics test results showed that the adsorption of carbaryl by A-SBC was dominated by hydrophobic interaction and was a spontaneous endothermic reaction. The adsorption performance of A-SBC for carbaryl was excellent, which could provide new ways and new materials for removing carbaryl in water environment.
- Publication
Acta Agriculturae Zhejiangensis, 2023, Vol 35, Issue 9, p2202
- ISSN
1004-1524
- Publication type
Article
- DOI
10.3969/j.issn.1004-1524.20220998