Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8854106 | Ecotoxicology and Environmental Safety | 2018 | 8 Pages |
Abstract
Aniline aerofloat (AAF), a high-toxic organic flotation reagent, is widely used in mineral processing industry. However, little information on its environmental fate is available. AAF sorption to four types of agricultural soils at low concentrations (1-10â¯mg/L) was investigated using batch experiments. AAF sorption kinetics involved both boundary layer diffusion and intraparticle diffusion, following pseudo-second-order kinetics with equilibrium time within 120â¯min. Both Langmuir and Freundlich models fitted well the AAF sorption with the former better. Sorption of AAF to soils was a spontaneous and favorable physical sorption that was controlled by ion bridge effect and hydrophobic interaction that was related to van der Waals force and Ï-Ï coordination based on FTIR analyses. AAF sorption was remarkably affected by soil constituents, positively correlating with the contents of organic matter and clay. The relatively higher logKoc values (3.53-4.66) of AAF at environmental concentrations (1-5â¯mg/L) imply that soils are serving as a sink of AAF from beneficiation wastewater, posing great potential risks to environment and human health.
Keywords
Related Topics
Life Sciences
Environmental Science
Environmental Chemistry
Authors
Lei Xiang, Tao Xiao, Ce-Hui Mo, Hai-Ming Zhao, Yan-Wen Li, Hui Li, Quan-Ying Cai, Dong-Mei Zhou, Ming-Hung Wong,