Correlations and adsorption mechanisms of aromatic compounds on a high heat temperature treated bamboo biochar

Environmental Pollution
Kun YangDaohui Lin

Abstract

Adsorption of aromatic compounds, including polycyclic aromatic hydrocarbons, nitrobenzenes, phenols, and anilines, on a bamboo biochar produced at 700 °C (Ba700) was investigated with the mechanism discussion by isotherm fitting using the Polanyi-theory based Dubinin-Ashtakhov (DA) model. Correlations of adsorption capacity (Q(0)) of organic compounds with their molecular sizes and melting points, as well as correlations of adsorption affinity (E) with their solvatochromic parameters (i.e., π* and αm), on the biochar, were developed and indicating that adsorption is captured by the pore filling mechanism and derived from the hydrophobic effects of organic compounds and the forming of π-π electron donor-acceptor (EDA) interactions and hydrogen bonding interactions of organic molecules with surface sites of the biochar. The effects of organic molecular sizes and melting points on adsorption capacity are ascribed to the molecular sieving effect and the packing efficiency of the organic molecules in the biochar pores, respectively. These correlations can be used to quantitatively estimate the adsorption of organic compounds on biochars from their commonly physicochemical properties including solvatochromic parameters, melting poin...Continue Reading

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Citations

Jan 14, 2017·Environmental Science and Pollution Research International·Xiangrui KongJingge Shang
Jun 22, 2018·Environmental Science and Pollution Research International·Chaosheng ZhangYing Xu
Oct 3, 2018·Journal of Environmental Quality·Jingjing YangChen Yang
Mar 20, 2020·Environmental Science and Pollution Research International·Rashida HameedDaohui Lin
Aug 14, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Imad HamadnehAmmar H Al-Dujaili
Dec 21, 2018·Environmental Science and Pollution Research International·Shiqiu ZhangKui Zheng
Nov 1, 2020·The Science of the Total Environment·Liufen RenKun Yang
Apr 2, 2021·The Science of the Total Environment·Kun YangWenhao Wu
Jul 3, 2021·Journal of Environmental Sciences (China)·Wenhao WuKun Yang

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