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Qiu, Lin
- Study on Arsenic (III) Sorption Behaviour by River Sediment
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Authors
Affiliations
1 Key Laboratory of Northwest Water Resources and Environment Ecology of MOE at Xi’an University of Technology, Xi’an 710048, CN
2 Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, CN
1 Key Laboratory of Northwest Water Resources and Environment Ecology of MOE at Xi’an University of Technology, Xi’an 710048, CN
2 Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450011, CN
Source
Nature Environment and Pollution Technology, Vol 13, No 2 (2014), Pagination: 339-344Abstract
The present study deals with sediment sorption of arsenic onto sediments from the middle Yellow River and major affecting factors (such as temperate, pH, particle size and sediment dose have been studied by isothermal sorption and single factor experiments. The results showed that sorption equilibrium time of each dose and particle size sediment was 5-10 min. expect 1kg/m3. When the sediment dose was 1kg/m3, the sorption equilibrium time was about 180min. The retention rate of As(III) increased with respect to sediment dose while the retention quality of per sediment decreased. As the sediment concentrations are the same, the smaller the particle size, the more the retention quality. The order for sorption As(III) was fine sediment>medium sediment>coarse sediment. When pH>7, the percentage of As (III) removal was higher compared to pH 7. A general increase was there in sorption with respect to pH above 7.0 for both the fractions of the sediment. It is evident that the pH for minimum uptake of As (III) is 7.0, and for maximum uptake is 9.0. At the same time, temperate as the main factor for sorption was also studied. The temperate experiments showed that the temperature is of significance to sorption. When temperatures between 10-15°C, the higher the temperature, the lower the removal rate. When temperatures between 15-20°C, the higher the temperature, the bigger the removal rate. After temperature greater than 20°C, temperature change effects on arsenic sorption rates do not remain obvious.Keywords
Arsenic (III), River Sediment, Sorption, pH, Temperature.Full Text
- Theoretical Exploration of Risk Analysis of Sewage Irrigation in Farmland
Abstract Views :217 |
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Authors
Affiliations
1 School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan, 450045, CN
1 School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan, 450045, CN
Source
Nature Environment and Pollution Technology, Vol 16, No 1 (2017), Pagination: 67-73Abstract
Sewage irrigation can provide water and fertilizer resource. However, sewage irrigation may lead to the accumulation of toxic and harmful substances in the soil and water source in some areas, which will be a serious threat to the human health in these areas. Risk of soil-crops, risk of surface water or underground water and risk of population health, which are greatly influenced by sewage irrigation, are selected to be research objects via analytic hierarchy process; evaluation indicators of degree of contamination of sewage irrigation to soil-crops, surface water or underground water and population health, and the computing method of the total risk degree are proposed, and the probability distribution of the risk of sewage irrigation is analysed. On the basis of theoretical study, combined with practical data, risk analysis of sewage irrigation in a given area is researched in this paper.Keywords
Sewage Irrigation, Risk Analysis, Evaluation Indicator, Exploration.Full Text
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- Study on Quantification Method for the Risk of Groundwater Environment Pollution Caused by Sewage Irrigation
Abstract Views :145 |
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Authors
Affiliations
1 School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan, 450045, CN
1 School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou, Henan, 450045, CN
Source
Nature Environment and Pollution Technology, Vol 17, No 1 (2018), Pagination: 287-291Abstract
Pollution by sewage irrigation of groundwater environment is slow and imperceptible. The pollution risk accumulated gradually, and the reasons for it are very complicated. Pollutants enter the underground aquifer through the leakage, leaching and other ways, and cause groundwater environment pollution. This paper presents the theory and quantification method for the degree of groundwater environment pollution caused by sewage irrigation, based on the study of the way and approach of groundwater environment pollution caused by sewage irrigation, critical content evaluation and current situation evaluation. By establishing the index model of the pollution degree of the groundwater environment, the study makes a quantitative description of the pollution risk of the groundwater environment. Finally, it analyses the study area, and the results show that: its pollution degree is 0.365, which means that the long-term sewage irrigation in the area has less risk to the groundwater environment.Keywords
Sewage Irrigation, Groundwater Pollution, Risk Quantification.Full Text
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