Mechanism of cadmium removal from soil by silicate composite biochar and its recycling

Gong, Huabo; Tan, Zhongxin; Huang, Kang; Zhou, Yuqian; Yu, Jiahui; Huang, Qiaoyun

doi:10.1016/j.jhazmat.2020.125022

Cited by 48 publications

(4 citation statements)

References 39 publications

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“…Cadmium sorption could occur directly on the biochar particles by formation of complexes with functional groups present in the amendment ( e.g. C-COOCd + and C-OCd + ) ( Gong et al., 2021 ). In the other hand, as soil pH and CECe increases, Cd may be sorbed to variable-charge solids (Fe and Mn oxides) under formation of mononuclear, monodentate binding ( e.g.…”

Section: Discussionmentioning

confidence: 99%

Reducing cadmium bioaccumulation in Theobroma cacao using biochar: basis for scaling-up to field

López

Arroyave

Aristizábal

et al. 2022

Heliyon

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Section: Discussionmentioning

confidence: 99%

Reducing cadmium bioaccumulation in Theobroma cacao using biochar: basis for scaling-up to field

López

Arroyave

Aristizábal

et al. 2022

Heliyon

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“…Crop soils generally have low SOC concentrations. Clay soil types generally retain more organic matter than sandy soils and therefore more organic carbon [42]. Changes in stable SOC usually occur very slowly (over decades) and, therefore, changes in the organic carbon content of agricultural soils are small, being most often determined in the upper layers.…”

Section: Evaluation Of the Influence Of Factors On The Extraction Of ...mentioning

confidence: 99%

Evaluation of the Phytoremediation Potential of the Sinapis alba Plant Using Extractable Metal Concentrations

Vasilache,

Diacu,

Cananau

et al. 2023

Plants

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Testing the feasibility of soil phytoremediation requires the development of models applicable on a large scale. Phytoremediation mechanisms include advanced rhizosphere biodegradation, phytoaccumulation, phytodegradation, and phytostabilization. The aim of this study was to evaluate the phytoremediation potential of the Sinapis alba. Identification of the factors influencing the extraction process of metals from contaminated soils in a laboratory system suitable for evaluating the phytoavailability of these metals in three solutions (M1-CaCl2, M2-DTPA, and M3-EDTA) included the following: distribution of metals in solution (Kd), soil properties and mobile fractions (SOC, CEC, pH), response surface methodology (RSM), and principal component analysis (PCA). The evaluation of the phytoremediation potential of the Sinapis alba plant was assessed using bioaccumulation coefficients (BACs). The accumulation of heavy metals in plants corresponds to the concentrations and soluble fractions of metals in the soil. Understanding the extractable metal fractions and the availability of metals in the soil is important for soil management. Extractable soluble fractions may be more advantageous in total metal content as a predictor of bioconcentrations of metals in plants. In this study, the amount of metal available in the most suitable extractors was used to predict the absorption of metals in the Sinapis alba plant. Multiple regression prediction models have been developed for estimating the amounts of As and Cd in plant organs. The performance of the predictive models generated based on the experimental data was evaluated by the adjusted coefficient of determination (aR2), model efficiency (RMSE), Durbin–Watson (DW) test, and Shapiro–Wilk (SW) test. The accumulation of the analyzed metals followed the pattern Root > Pods > Leaves > Seeds, stems > Flowers for As and Leaves > Root > Stem > Pods > Seeds > Flowers for Cd in soil contaminated with different metal concentrations. The obtained results showed a phytoremediation potential of the Sinapis alba plant.

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“…In fact, the transport mechanism of HMs includes multiple effects, such as convection, molecular dispersion and mechanical dispersion [ [20] , [21] , [22] ]. Whether in unsaturated or saturated soils, the molecular diffusion coefficient of pollutants is closely related to the volumetric water content [ [23] , [24] , [25] ]. If the seepage flow in the pores is quick, the effect of mechanical dispersion is greater than that of molecular dispersion, and the effect of molecular diffusion can be neglected.…”

Section: Introductionmentioning

confidence: 99%

The migration process and temperature effect of aqueous solutions contaminated by heavy metal ions in unsaturated silty soils

Bai,

Hou

2024

Heliyon

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Mechanism of cadmium removal from soil by silicate composite biochar and its recycling

Cited by 48 publications

References 39 publications

Reducing cadmium bioaccumulation in Theobroma cacao using biochar: basis for scaling-up to field

Reducing cadmium bioaccumulation in Theobroma cacao using biochar: basis for scaling-up to field

Evaluation of the Phytoremediation Potential of the Sinapis alba Plant Using Extractable Metal Concentrations

The migration process and temperature effect of aqueous solutions contaminated by heavy metal ions in unsaturated silty soils

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