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Characterization of biochars from woody agricultural wastes and sorption behavior comparison of cadmium and atrazine

文献类型： 外文期刊

作者： Li, Xiang 1 ; Huang, Yufen 1 ; Liang, Xiaoliang 3 ; Huang, Lianxi 1 ; Wei, Lan 1 ; Zheng, Xiaodong 1 ; Albert, Houssou Assa 1 ; Huang, Qing 1 ; Liu, Zhongzhen 1 ; Li, Zhaojun 3 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Guangdong, Peoples R China

2.Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China

3.Shandong Acad Agr Sci, Inst Anim Sci & Vet Med, 202 Ind North Rd, Jinan 250100, Shandong, Peoples R China

关键词： Biochar; Adsorption; Heavy metal; Atrazine; Correlation

期刊名称：BIOCHAR （ 影响因子：11.452； 五年影响因子：11.452 ）

ISSN： 2524-7972

年卷期： 2022 年 4 卷 1 期

页码：

收录情况： SCI

摘要： Woody agricultural wastes have created enormous pressure on the environment. In this study, mulberry and cinnamon woodchips were reclaimed and prepared for biochars through pyrolysis technique at four different temperatures. Physicochemical properties showed that mulberry biochar exhibited higher pH, CEC and ash content than cinnamon biochar at each temperature. All biochars were utilized as adsorbents to remove cadmium (Cd) and atrazine (AT) from water. The adsorption isotherms were found to be well fitted by Freundlich and Langmuir models. The maximum adsorption capacities were 5306.41 mg/kg for Cd adsorption and 538.89 mg/kg for AT adsorption, respectively. Moreover, the principal component analysis, XPS and FTIR analysis proved that precipitation with phosphate in biochars acted as the key property that governed the adsorption capacity of Cd, whereas the porosity demonstrated a significant impact on the adsorption capacity of AT. Partial least squares (PLS) model was considered to be more favorable for predicting AT adsorption than Cd adsorption. The results of the present paper will be helpful for selecting most effective biochars from locally available woody agricultural byproducts that are optimized for contaminants removal from environment.

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