Adsorption and desorption of agricultural waste-derived DOMs in soil

3rd International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Li, H.L.^1 ; Yang, G.H.^1 ; Zhu, G.Y.^1 ; Sun, Z.Q.^1 ; Yu, X.Y.^1

School of Resources and Environment, University of Jinan, Jinan

250022, China^1

关键词: Adsorption and desorptions;    Aromatic substances;    Average molecular weight;    Desorption hysteresis;    Dissolved organic matters;    Freundlich isotherm;    Sorption and desorptions;    Sorption equilibria;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/61/1/012009/pdf
DOI  :  10.1088/1755-1315/61/1/012009

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The sorption and desorption of two forms of dissolved organic matter (DOM) extracted from agricultural wastes were studied by batch experiments. The adsorption of the two DOMs on the soil were well fitted to the Linear and Freundlich isotherms. DOM extracted from cow manure (MDOM) shows higher affinity to the soil than that extracted from wheat straw (SDOM). Significant desorption hysteresis was observed for both DOMs. Due to the desorption of some aromatic substances with larger molecular weight from the soil, the average molecular weight and aromaticity of the DOMs increased at sorption equilibrium compared with those before sorption.