The systematic exploration of cadmium-accumulation characteristics of maize kernel in acidic soil with different pollution levels in China

Lu, Feng; Yan, Han; Dai, Changhua; Xu, Wenxiu; Gu, Fengying; Fan, Zhang; Li, Ting; Xian, Jiayue; He, Xinhua; Yu, Yijun; Ma, Ming; Wang, Feng; He, Zhenyan

doi:10.1016/j.scitotenv.2020.138972

Cited by 43 publications

(16 citation statements)

References 31 publications

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“…Polygalacturonic acids bind the majority of trace metals found in cell walls. In plants, cell walls may give functional groups, i.e., pectin, cellulose-microfibrils, and lignin, to unite Cd ions simultaneously and limit their bioavailability ( Khanna et al, 2019a ; Feng et al, 2020 ). TU can reduce Cd toxicity in cereals by enhancing hemicellulose and pectin content in root cell walls, improving the accumulation of Cd in cell walls of the root zone, and decreasing the accumulation of Cd in the below-aboveground fraction ( Zhang et al, 2009 ).…”

Section: Discussionmentioning

confidence: 99%

Integrated Application of Thiourea and Biochar Improves Maize Growth, Antioxidant Activity and Reduces Cadmium Bioavailability in Cadmium-Contaminated Soil

et al. 2022

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Section: Discussionmentioning

confidence: 99%

Integrated Application of Thiourea and Biochar Improves Maize Growth, Antioxidant Activity and Reduces Cadmium Bioavailability in Cadmium-Contaminated Soil

et al. 2022

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“…Cadmium-contaminated soils will eventually produce cadmium-contaminated grains, posing a serious threat to human health (Feng et al 2020). Therefore, nding viable solutions to reduce the health risk posed by cadmium pollution has become a research priority in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…Plants absorb cadmium from the contaminated soil and accumulate large amounts of this element, which then enters the food chain once the edible parts of plants are ingested by various animal species [ 7 ]. Cadmium-contaminated soils will eventually produce cadmium-contaminated grains, posing a serious threat to human health [ 8 ]. Therefore, finding viable solutions to reduce the health risk posed by cadmium pollution has become a research priority in recent years.…”

Section: Introductionmentioning

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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“…In southwest China, a large amount of farmlands were contaminated with Cd owing to the intensive industrialization (Chen et al, 2018a). In addition, soil acidification also aggravated the bioavailability and solubility of Cd, thus enhancing Cd uptake by crops (Feng et al, 2020). Therefore, the development of cost-effective and eco-friendly remediation technologies is crucial for food safety and soil quality.…”

Section: Introductionmentioning

confidence: 99%

The cooperative application of oyster shell and biochar efficiently enhanced in-situ remediation of cadmium contaminated soil around intensive industry

Sheng

et al. 2022

Preprint

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Abstract. Biochar has been widely used for the in-situ remediation in the cadmium (Cd) contaminated soil, while the high-cost of biochar limited its application in farmland. In this study, we firstly investigated the possibility of cooperative application of oyster shell and biochar to enhance Cd immobilization efficiency and reduce the cost in field experiments under rice-oilseed rape rotation. Treatments were comprised of: rice planting without amendments (R-PA0); followed with 15000 kg/ha biochar (R-PA1); followed with 15000 kg/ha oyster shell (R-PA2); followed with 7500 kg/ha biochar and 7500 kg/ha oyster shell (R-PA3); rice-oilseed rape rotation without amendments (RT-PA0); rotation with 15000 kg/ha biochar (RT-PA1); rotation with 15000 kg/ha oyster shell (RT-PA2); rotation with 7500 kg/ha biochar and 7500 kg/ha oyster shell (RT-PA3). Results revealed that HOAc-extractable Cd was significantly decreased by 38.46 % in R-PA2. Cd contents in brown rice and oilseed were reduced by 29.67 % in R-PA3 and 19.74 % in RT-PA3 compared with control. Meanwhile, Hazard Quotient of brown rice and oilseed significantly decreased in RT-PA3. The Olsen-P in R-PA3 and RT-PA3 was markedly increased by 187.46 % and 184.73 %, respectively. In addition, activities of urease, catalase, and β-galactosidase in RT-PA3 were significantly increased by 268.88 %, 30.44 % and 245.28 %, respectively. Furthermore, the jiont application of biochar with oyster shell significantly decreased the cost of soil remediation at least 9600 RMB/ha. These results demonstrated that the joint utilization of biochar with oyster shell might be an economical and effective pathway to achieve in-situ remediation of Cd contaminated farmland.

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The systematic exploration of cadmium-accumulation characteristics of maize kernel in acidic soil with different pollution levels in China

Cited by 43 publications

References 31 publications

Integrated Application of Thiourea and Biochar Improves Maize Growth, Antioxidant Activity and Reduces Cadmium Bioavailability in Cadmium-Contaminated Soil

Integrated Application of Thiourea and Biochar Improves Maize Growth, Antioxidant Activity and Reduces Cadmium Bioavailability in Cadmium-Contaminated Soil

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

The cooperative application of oyster shell and biochar efficiently enhanced in-situ remediation of cadmium contaminated soil around intensive industry

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