Impact of Long-Term Reclaimed Water Irrigation on the Distribution of Potentially Toxic Elements in Soil: An In-Situ Experiment Study in the North China Plain

International Journal of Environmental Research and Public Health
Xiaomin GuQiuming Pei

Abstract

The widespread use of reclaimed water has alleviated the water resource crisis worldwide, but long-term use of reclaimed water for irrigation, especially in agricultural countries, might threaten the soil environment and further affect groundwater quality. An in-situ experiment had been carried out in the North China Plain, which aimed to reveal the impact of long-term reclaimed water irrigation on soil properties and distribution of potentially toxic elements (As, Cd, Cr, Hg, Zn and Pb) in the soil profile as well as shallow groundwater. Four land plots were irrigated with different quantity of reclaimed water to represent 0, 13, 22 and 35 years' irrigation duration. Pollution Load Index (PLI) values of each soil layer were calculated to further assess the pollution status of irrigated soils by potentially toxic elements (PTEs). Results showed that long-term reclaimed water irrigation caused appreciable increase of organic matter content, and might improve the soil quality. High soil organic matter concentrations conduced to high adsorption and retention capacity of the soils toward PTEs, which could reduce the risk of PTEs leaching into deep layers or shallow groundwater. Highest levels of Cr, Pb and Zn were observed at 200⁻2...Continue Reading

References

Jan 15, 2000·The Science of the Total Environment·F CabreraJ M Murillo
May 2, 2014·Environmental Science. Processes & Impacts·Aifang JinGuoxin Huang
Mar 24, 2016·International Journal of Environmental Research and Public Health·Shibao LuLiang Pei

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Citations

Jun 13, 2019·International Journal of Environmental Research and Public Health·Qing MaSi Alu
Oct 21, 2021·Environmental Science and Pollution Research International·Pei LiangSun Liying
Dec 27, 2021·The Science of the Total Environment·Sidan LyuWeiping Chen

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Methods Mentioned

BETA
fluorescence spectroscopy

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