Removal of ions from produced water using Powder River Basin coal
Zaixing Huang1
Fangjing Liu2
Mingchen Tang2
Yangyan Gao3
David M.Bagley2
Xin He2
Alexander Goroncy4
Maohong Fan5
1.Department of Petroleum Engineering,University of Wyoming,Laramie,WY 82071,USA2.Departments of Chemical Engineering,University of Wyoming,Laramie,WY 82071,USA3.Departments of Chemical Engineering,University of Wyoming,Laramie,WY 82071,USA;Department of Environmental Engineering,Shanxi University,Taiyuan 030001,China4.Department of Chemistry,University of Wyoming,Laramie,WY 82071,USA5.Department of Petroleum Engineering,University of Wyoming,Laramie,WY 82071,USA;School of Civil and Environmental Engineering,Georgia Institute of Technology,Atlanta,GA 30332,USA
摘要：In addition to being used as an energy source,coal also has significant potential for other,more sustainable uses including water treatment.In this study,we present a simple approach to treat water that was produced during oil production and contained a total dissolved solids(TDS)content of over 150 g/L using Powder River Basin(PRB)coal.PRB coal used as packing material in a flow-through column effectively removed 60％-80％of the cations and anions simultaneously.Addi-tionally,71％-92％of the total organic carbon in the produced water was removed as was all of the total suspended solids.The removal mechanisms of both cations and anions were investigated.Cations were removed by ion exchange with protons from oxygen-containing functional groups such as carboxylic and phenolic hydroxyl groups.Anions,mainly Cl-1,appeared to be removed through either the formation of resonance structures as a result of delocalization of electrons within coal molecules or through ion-π interactions.We propose that coal is a"pseudo-amphoteric"exchange material that can remove cations and anions simultaneously by exchanging ions with both ionized and non-ionized acids that are ubiquitous in coal structure or resonance effect.
机标关键词：powderwaterfrombasincoalionsproducedremoval
论文发表日期：2022-02-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：12( 46-57 )
英文信息