Sorption of polycyclic aromatic hydrocarbons (PAHs) to lignin: effects of hydrophobicity and temperature

Bulletin of Environmental Contamination and Toxicology
Ming ZhangYong Sik Ok

Abstract

The study of the sorption of contaminants to lignin is significant for understanding the migration of contaminants in the environment as well as developing low cost sorbent. In this study, sorption of three polycyclic aromatic hydrocarbons (PAHs), naphthalene, acenaphthene and phenanthrene, to lignin was investigated. Sorption isotherms were well described by both linear and Freundlich sorption models. Sorption coefficients of PAHs to lignin from water obtained from regression of both linear model (K d) and Freundlich model (K f) were highly positively correlated with hydrophobicity of PAHs. The amorphous structure of lignin provided sufficient sorption domain for partitioning of PAHs, and the attraction between PAHs molecules and aromatic fractions in lignin via π-π electron-donor-acceptor (π-π EDA) interaction is hypothesized to provide a strong sorption force. Thermodynamic modeling revealed that sorption of PAHs to lignin was a spontaneous and exothermic process.

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Citations

Mar 4, 2015·Journal of Hazardous Materials·Anushka Upamali RajapakshaYong Sik Ok
Apr 11, 2015·Environmental Science and Pollution Research International·Haiping GuJianming Xu
Sep 7, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Le TongZhi Dang
Jul 12, 2018·Bulletin of Environmental Contamination and Toxicology·Donatella CanianiSalvatore Masi
Aug 14, 2018·Environmental Science and Pollution Research International·Gonasageran Naidoo, Krishnaveni Naidoo
Apr 29, 2021·Environmental Geochemistry and Health·Tatiana MinkinaCarla Sofia Santos Ferreira
Aug 24, 2020·Ecotoxicology and Environmental Safety·Xiaotong ShenCongcong Zhao
Aug 1, 2020·Journal of Environmental Management·Monireh S Hedayati, Loretta Y Li

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