Department of Engineering, University of Campania "Luigi Vanvitelli", Via Roma 29, 81031 Aversa (CE), Italy.
Environmental Technologies, University Spin Off of University of Campania "Luigi Vanvitelli", Via Vivaldi, 43, 81100 Caserta, Italy.
Molecules. 2020 Feb 19;25(4):918. doi: 10.3390/molecules25040918.
Humic acids (HA) are promising green materials for water and wastewater treatment. They show a strong ability to sorb cationic and hydrophobic organic pollutants. Cationic compounds interact mainly by electrostatic interaction with the deprotonated carboxylic groups of HA. Other functional groups of HA such as quinones, may form covalent bonds with aromatic ammines or similar organic compounds. Computational and experimental works show that the interaction of HA with hydrophobic organics is mainly due to π-π interactions, hydrophobic effect and hydrogen bonding. Several works report that sorbing efficiency is related to the hydrophobicity of the sorbate. Papers about the interaction between organic pollutants and humic acids dissolved in solution, in the solid state and adsorbed onto solid particles, like aluminosilicates and magnetic materials, are reviewed and discussed. A short discussion of the thermodynamics and kinetics of the sorption process, with indication of the main mistakes reported in literature, is also given.
腐殖酸（HA）是一种很有前途的用于水和废水处理的绿色材料。它们具有很强的吸附阳离子和疏水性有机污染物的能力。阳离子化合物主要通过与 HA 的去质子化羧酸基团之间的静电相互作用相互作用。HA 的其他官能团，如醌，可能与芳族胺或类似的有机化合物形成共价键。计算和实验工作表明，HA 与疏水性有机物的相互作用主要是由于π-π相互作用、疏水作用和氢键。有几项工作报告说，吸附效率与吸附质的疏水性有关。本文综述并讨论了有机污染物与溶解在溶液中的、在固态中以及吸附在诸如铝硅酸盐和磁性材料等固体颗粒上的腐殖酸之间的相互作用。还简要讨论了吸附过程的热力学和动力学，并指出了文献中报道的主要错误。
