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Adsorption of Pyraclostrobin in Water by Bamboo-Derived and Pecan Shell-Derived Biochars

文献类型： 外文期刊

作者： Yang, Kongtan 1 ; Wang, Xumi 2 ; Wu, Huanqi 2 ; Fang, Nan 2 ; Liu, Yuxue 3 ; Zhang, Changpeng 2 ; Yu, Xiaobin 1 ; Wang, Xiangyun 2 ;

作者机构： 1.Jilin Agr Univ, Coll Plant Protect, Changchun 130118, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Agroprod Safety & Nutr, Key Lab Pesticide Residue Detect, Minist Agr & Rural Affairs, Hangzhou 310021, Peoples R China

3.Zhejiang Acad Agr Sci, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

4.Ningbo Univ, Coll Food & Pharmaceut Sci, Ningbo 315211, Peoples R China

5.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, Hangzhou 310021, Peoples R China

关键词： pyraclostrobin; pecan shell; bamboo; biochar; adsorption mechanism; deashing

期刊名称：SUSTAINABILITY （ 影响因子：3.9； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 15 卷 19 期

页码：

收录情况： SCI

摘要： Pyraclostrobin is a potent extensive-spectrum fungicide widely used in agricultural production but poses a substantial threat to aquatic life. Therefore, there is an urgent need to remove pyraclostrobin from the ecological environment. This study reports the adsorption of pyraclostrobin in water using pecan-shell biochar, bamboo biochar, and their deashing products. The kinetics and isotherms indicate that the pseudo-second-order kinetics and Freundlich model are the most suitable for both types of biochar. The thermodynamic results demonstrate that the adsorption process of biochar is spontaneous and exothermic. Combined with characterization and factor analysis experiments, it is revealed that the adsorption of pyraclostrobin on biochar is attributed to various mechanisms, including pore filling, hydrophobic interactions, pi-pi and p-pi interactions, and hydrogen bonding. At the initial concentration of 0.5 mg center dot L-1, the adsorption rates of pyraclostrobin of the four biochar samples (<0.075 mm) reached 67-80% within 5 min. These findings suggest that both pecan-shell and bamboo biochars are efficient pyraclostrobin adsorbents, with the former showing better outcomes. There is still an adsorption rate of >97% after 5 cycles of adsorption by two types of biochars. Deashing significantly enhances the adsorption efficiency of pecan biochar, but it has an insignificant effect on bamboo biochar. This study will aid in the selection of cost-effective and ecofriendly adsorbents to reduce the environmental risk associated with pyraclostrobin.

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