Sorption and Desorption Behavior of 4-Nonylphenol and a Branched Isomer on Soils with Long-Term Reclaimed Water Irrigation

2019 ◽  
Vol 36 (9) ◽  
pp. 1100-1111
Author(s):  
Shiyu Wang ◽  
Xiaoou Li ◽  
Wenyong Wu ◽  
Fei Liu
Keyword(s):  
Reclaimed Water ◽  
Branched Isomer ◽  
Reclaimed Water Irrigation

scholarly journals 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

2019 ◽  
Vol 16 (4) ◽  
pp. 649 ◽  
Author(s):  
Xiaomin Gu ◽  
Yong Xiao ◽  
Shiyang Yin ◽  
Honglu Liu ◽  
Baohui Men ◽  
...  
Keyword(s):  
Toxic Elements ◽  
Reclaimed Water ◽  
Soil Layer ◽  
Shallow Groundwater ◽  
Potentially Toxic Elements ◽  
In Situ Experiment ◽  
The North ◽  
Reclaimed Water Irrigation

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 200–240 cm and 460–500 cm horizons in plots. Longer irrigation time (35 years and 22 years) resulted in a decreasing trend of As, Cd, Hg, Pb and Zn in lower part of soil profiles (>540 cm) compared with that with 13-years’ irrigation years. Long-term reclaimed water irrigation still brought about increases in concentrations of some elements in deep soil layer although their content in soils and shallow groundwater was below the national standard. Totally speaking, proper management for reclaimed water irrigation, such as reduction of irrigation volume and rate of reclaimed water, was still needed when a very long irrigation period was performed.

scholarly journals Impact of Long-Term Reclaimed Water Irrigation on Trace Elements Contents in Agricultural Soils in Beijing, China

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1716 ◽  
Author(s):  
Yaqi Hu ◽  
Wenyong Wu ◽  
Di Xu ◽  
Honglu Liu
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Ecological Risk ◽  
Agricultural Soils ◽  
Reclaimed Water ◽  
Soil Layer ◽  
Potential Ecological Risk ◽  
Beijing China ◽  
Reclaimed Water Irrigation

The rapid increase of reclaimed water irrigation on agricultural soils requires investigation of its impact on soil health. In this study, a simulation experiment for various lengths of long-term reclaimed water irrigation time (98, 196 and 236 years, respectively) was conducted in the southeast suburb of Beijing, China. Unirrigated soil served as the control. The environmental behavior of seven trace elements (As, Cd, Cr, Cu, Hg, Pb and Zn) at different soil depths in 0–600 cm profiles was analyzed. Results showed that the 0–30 and 200–300 cm soil layers were more likely to accumulate trace elements under long-term reclaimed water irrigation, although the accumulation in the 0–600 cm profiles was not particularly obvious. Correlation analysis showed that the trace element concentrations and distribution were significantly related to clay fraction and organic matters (OM), whereas they were not related to redox potential (Eh). The potential ecological risk assessment showed that the long-term reclaimed water irrigation did not result in a significantly increased ecological risk. However, Cd and Hg were identified as the metals with the highest potential ecological risk in the study area and the trace element contents in the top 0–30 cm soil layer should be carefully monitored. Future studies are required to clarify the environmental risks of trace elements under long-term reclaimed water irrigation as they might slowly accumulate in soil with time.

scholarly journals Hydrogeochemical Characterization and Quality Assessment of Groundwater in a Long-Term Reclaimed Water Irrigation Area, North China Plain

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1209 ◽  
Author(s):  
Xiaomin Gu ◽  
Yong Xiao ◽  
Shiyang Yin ◽  
Qichen Hao ◽  
Honglu Liu ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Groundwater Quality ◽  
Reclaimed Water ◽  
Shallow Groundwater ◽  
Deep Groundwater ◽  
Irrigation Area ◽  
Deep Aquifers ◽  
Drinking And Irrigation ◽  
Reclaimed Water Irrigation

Water scarcity has led to wide use of reclaimed water for irrigation worldwide, which may threaten groundwater quality. To understand the status of groundwater in the reclaimed water irrigation area in Beijing, 87 samples from both shallow and deep aquifers were collected to determine the factors affecting groundwater chemistry and to assess groundwater quality for drinking and irrigation purposes. The results show that groundwater in both shallow and deep aquifers in the study area is weakly alkaline freshwater with hydrogeochemical faces dominated by HCO3-Na·Mg·Ca, HCO3-Mg·Ca·Na, HCO3-Ca·Na, and HCO3-Na. The chemical composition of groundwater in both shallow and deep aquifers is dominantly controlled by the dissolution of halite, gypsum, anhydrite, and silicates weathering, as well as ion exchange. Geogenic processes (rock weathering and ion exchange) are the only mechanisms controlling groundwater chemistry in deep aquifers. Besides geogenic processes, evaporation and anthropogenic activities also affect the chemistry of shallow groundwater. Quality assessment reveals that both shallow and deep groundwater are generally suitable for drinking and irrigation purposes. The quality of deep groundwater is more excellent for drinking than shallow groundwater. However, long-term use of deep groundwater for irrigation exhibits higher potential risks to deteriorate soil property due to the relative higher permeability indexes (PI). Therefore, it is recommended that deep groundwater is preferentially used for drinking and domestic purpose, and shallow groundwater for agricultural irrigation.

Accumulation of Cd in agricultural soil under long-term reclaimed water irrigation

2013 ◽  
Vol 178 ◽  
pp. 294-299 ◽  
Author(s):  
Weiping Chen ◽  
Sidan Lu ◽  
Chi Peng ◽  
Wentao Jiao ◽  
Meie Wang
Keyword(s):  
Agricultural Soil ◽  
Reclaimed Water ◽  
Reclaimed Water Irrigation
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