Spatial and Vertical Distribution of Short Chain Chlorinated Paraffins in Soils from Wastewater Irrigated Farmlands
- 14 February 2011
- journal article
- Published by American Chemical Society (ACS) in Environmental Science & Technology
- Vol. 45 (6), 2100-2106
- https://doi.org/10.1021/es103740v
Abstract
Chlorinated paraffins (CPs) are one of the most complex groups of halogenated contaminants in the environment. However, studies of short chain CPs (SCCPs) in China are very scarce. In this study, the concentrations and distribution of SCCPs in farm soils from a wastewater irrigated area in China were investigated. SCCPs were detected in all topsoil samples, with the sum of the concentrations (ΣSCCPs) in the range of 159.9−1450 ng/g (dry weight, dw). A noticeable spatial trend and specific congener distribution were observed in the wastewater irrigated farmland. Soil vertical profiles showed that ΣSCCP concentrations below the plowed layer decreased exponentially and had a significant positive relationship (R2 > 0.83) with total organic carbon in soil cores. Furthermore, soil vertical distributions indicated that lower chlorinated (Cl5−6) and shorter chain (C10−12) congeners are more prone to migrate to deeper soil layers compared to highly chlorinated and longer chain congeners. This work demonstrated that effluents from sewage treatment plants (STPs) could be a significant source of SCCPs to the ambient environment and wastewater irrigation can lead to higher accumulation of SCCPs in farm soils.Keywords
This publication has 34 references indexed in Scilit:
- Occurrence, fate and analysis of polychlorinated n-alkanes in the environmentTrAC Trends in Analytical Chemistry, 2009
- Analysis of short-chain chlorinated paraffins: a discussion paperJournal of Environmental Monitoring, 2007
- Validation of predicted exponential concentration profiles of chemicals in soilsEnvironmental Pollution, 2007
- Chlorinated paraffins: A review of analysis and environmental occurrenceEnvironment International, 2006
- Recent developments in the analysis of chlorinated paraffinsTrAC Trends in Analytical Chemistry, 2006
- Short and medium chain length chlorinated paraffins in UK human milk fatEnvironment International, 2006
- Spatial and Temporal Variability in Air Concentrations of Short-Chain (C10−C13) and Medium-Chain (C14−C17) Chlorinated n-Alkanes Measured in the U.K. AtmosphereEnvironmental Science & Technology, 2005
- Occurrence of C10–C13 polychlorinated n-alkanes in the atmosphere of the United KingdomAtmospheric Environment, 2000
- Occurrence of C10−C13 Polychlorinated n-Alkanes in Canadian Midlatitude and Arctic Lake SedimentsEnvironmental Science & Technology, 1999
- Dietary accumulation of C12‐ and C16‐chlorinated alkanes by juvenile rainbow trout (Oncorhynchus mykiss)Environmental Toxicology and Chemistry, 1996