Effect of multiple factors on the adsorption of Cd in an alluvial soil from Xiba, China

Ren, Bangzheng; Wu, Yong; Deng, Dongping; Tang, Xuefang; Li, Hongtao

doi:10.1016/j.jconhyd.2020.103605

Cited by 13 publications

(8 citation statements)

References 49 publications

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“…As shown in Figure 5 B, cadmium concentrations generally declined with the decrease of SOM content. Ren et al (2020) [ 48 ] pointed out that after the removal of SOM, the cadmium adsorption capacity generally decreased. SOM has a large surface area and abundant oxygen-containing functional groups (carboxyl, phenolic, hydroxyl, etc.…”

Section: Resultsmentioning

confidence: 99%

Adsorption and pH Values Determine the Distribution of Cadmium in Terrestrial and Marine Soils in the Nansha Area, Pearl River Delta

Wang

Bao

Huang

et al. 2022

IJERPH

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Cadmium is a toxic element with a half-life of several decades, which can accumulate in the human body by entering the food chain and seriously harm health. The cadmium adsorption and desorption processes in the soil directly affect the migration, transformation, bioavailability, and ecotoxicity of this element in soil-plant systems. Coastal zones are located in the transitional zone between land and sea, and large amounts of terrigenous material input have important environmental effects on this ecosystem. The pH, hydrodynamic conditions, soil organic matter (SOM), and other factors defining the sea-land interaction within the sedimentary environment are significantly different from those defining land facies. In order to study the key factors affecting cadmium adsorption in soils at the sea-land interface in the Nansha area of the Pearl River Delta, a test was conducted on a column of undisturbed soil. The results showed that the adsorption constant KF and the Cd2+ adsorption capacity of marine soils were higher than those of terrestrial soils. However, the saturation adsorption of cadmium in terrestrial sediments was higher than in marine sediments. Soil pH was an important factor affecting cadmium adsorption capacity in both terrestrial and ma-rine sediments. Neutral and alkaline topsoil conditions inhibited the vertical migration of cadmium, while the acidic environment favored it. The higher the clay and SOM were, the stronger the Cd2+ adsorption capacity of the soil was. These findings suggest that the distribution of cadmium in marine and continental sedimentary soils is not only related to adsorption, but also to the physical and chemical processes occurring in different sedimentary environments.

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Section: Resultsmentioning

confidence: 99%

Adsorption and pH Values Determine the Distribution of Cadmium in Terrestrial and Marine Soils in the Nansha Area, Pearl River Delta

Wang

Bao

Huang

et al. 2022

IJERPH

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“…The high concentration of Cd caused heavy metal pollution in the agricultural soils of the study area. Accordingly, long-term consumption of rice, vegetables, fruits, and water seriously polluted by Cd are likely to lead to chronic poisoning [ 54 , 55 ]. In addition, Cd has become the most serious heavy metal soil pollutant in China and substantially affects the quality and yield of crops [ 4 , 56 ].…”

Section: Resultsmentioning

confidence: 99%

Pollution Characteristics and Spatial Distribution of Heavy Metals in Coal-Bearing Sandstone Soil: A Case Study of Coal Mine Area in Southwest China

Deng

Sun

et al. 2022

IJERPH

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Soil pollution in coal mining areas is a serious environmental problem in China and elsewhere. In this study, surface and vertical profile soil samples were collected from a coal mine area in Dazhu, Southwestern China. Microscopic observation, concentrations, chemical speciation, statistical analysis, spatial distribution, and risk assessment were used to assess heavy metal pollution. The results show that the weathering of coal-bearing sandstone and mining activities substantially contributed to soil pollution. The concentrations of Fe, Ni, Cu, Zn, Mn, Cd, Hg, and Pb exceeded their background values. Cd caused the most intense pollution and was associated with heavily–extremely contaminated soils. The residual fraction was dominant for most metals, except Cd and Mn, for which the reducible fraction was dominant (Cd: 55.17%; Mn: 81.16%). Zn, Ni, Cd, and Cu presented similar distribution patterns, and Hg and As also shared similar distribution characteristics. Factor 1 represented anthropogenic and lithologic sources, which were affected by mining activities; Factor 2 represented anthropogenic sources, e.g., fertilizers and traffic pollution; and Factor 3 represented the contribution of metals from soil-forming parent material. More than half of the study area had high pollution risk and was not suitable for vegetable cultivation.

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“…This may be due to the competitive adsorption of excessive free Na + and K + at greater zeolite dosages, which decreased the Cd(II) adsorption capacity of the soil (Zhou et al, 2003). Furthermore, K + has been reported to have a more negative effect on the Cd adsorption capacity of soils (Ren et al, 2020), which may explain the slight lower immobilization efficiency of sample 28 at a dosage of 6-8 wt.%.…”

Section: Cd(ii) Immobilization Potential Of Geopolymer-supported Zeolites In Paddy Soilmentioning

confidence: 99%

“…This may be due to a decrease in the cadmium adsorption capacity of soil itself caused by the competitive adsorption of excessive free Na + and K + when a higher zeolite dosage was used (Zhou et al, 2003). Furthermore, K + has been reported to have a more negative effect on the cadmium adsorption capacity of soil (Ren et al, 2020), which was responsible for the slight lower immobilization efficiency of sample 28 at 6-8 wt% addition. Fig.…”

Section: Cd(ii) Immobilization Potential Of Geopolymer-supported Zeolites In Paddy Soilmentioning

confidence: 99%

In situ synthesis of zeolites by geopolymerization with NaOH/KOH mixed solution and their potential application for Cd(II) immobilization in paddy soil

Huang

Xiao

et al. 2021

Clay miner.

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Effect of multiple factors on the adsorption of Cd in an alluvial soil from Xiba, China

Cited by 13 publications

References 49 publications

Adsorption and pH Values Determine the Distribution of Cadmium in Terrestrial and Marine Soils in the Nansha Area, Pearl River Delta

Adsorption and pH Values Determine the Distribution of Cadmium in Terrestrial and Marine Soils in the Nansha Area, Pearl River Delta

Pollution Characteristics and Spatial Distribution of Heavy Metals in Coal-Bearing Sandstone Soil: A Case Study of Coal Mine Area in Southwest China

In situ synthesis of zeolites by geopolymerization with NaOH/KOH mixed solution and their potential application for Cd(II) immobilization in paddy soil

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