Sorption of polar and nonpolar aromatic compounds to four surface soils of eastern China.
Improved predictions on the fate of organic pollutants in surface environments require a better understanding of the underlying sorption mechanisms that control their uptake by soils. In this study, we monitored sorption of nine aromatic compounds with varying physicochemical properties (hydrophobicity, electron-donor/acceptor ability and polarity), including two polycyclic aromatic hydrocarbons, two chlorobenzenes, two nitroaromatic compounds, dichlobenil, carbaryl and 2,4-dichlorophenol in aqueous suspension of four surface soils of eastern China. The tested soils were characterized with respect to organic carbon (OC) content, black carbon content, mineralogy, morphology and size fraction to assess the role of the diverse soil characteristics in sorption. The results of this study show that not only the solute hydrophobicity and the OC content of soil are important to the retention of organic pollutants, but also the solute molecular structure and the soil nature.
State Key Laboratory of Pollution Control and Resource Reuse, and School of the Environment, Nanjing University, 22 Hankou Road, Jiangsu 210093, PR China.
Ping
P
Liu
Dongqiang
D
Zhu
Hua
H
Zhang
Xin
X
Shi
Huiyu
H
Sun
Fei
F
Dang
D000327:Adsorption; D001673:Biodegradation, Environmental; D002244:Carbon; D002681:China; D002722:Chlorobenzenes / Q000737:chemistry; D004784:Environmental Monitoring / Q000379:methods; D006812:Humic Substances; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000737:chemistry*
D002722:Chlorobenzenes; D006812:Humic Substances; D006843:Hydrocarbons, Chlorinated; D052638:Particulate Matter; D011084:Polycyclic Aromatic Hydrocarbons; D012987:Soil; D012989:Soil Pollutants; D002244:Carbon