Effects of adsorption characteristics of different amendments on heavy metals (Pb, Zn, and Cd)

Li, Yaqian; Ma, Jing; Shafi, Mohammad; Sun, Yefang; Li, Yongqing; Chen, Zhenhua; Xiang, Zichen; Jin, Gaoqi; Zhong, Beilong; Ye, Zhengqian; Liú, Dan

doi:10.1007/s11368-020-02620-4

Cited by 11 publications

(2 citation statements)

References 32 publications

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“…This covers the process from initial preparation to pre-application amendment preparation (Table 3). To date, a variety of passivating materials have been developed and tested, including industrial solid waste, agricultural waste, clay minerals, and synthetic materials [48]. However, some studies have considered only the efficiency of amendments in fixing to heavy metals and have ignored the potential risks to soils and crops of passivating materials containing pollutants [49][50][51].…”

Section: Pre-remediationmentioning

confidence: 99%

Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil—A Review

Feng

Cheng²

2023

IJERPH

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Reducing the mobility and bioavailability of heavy metals in soils by adding exogenous materials is a technology for remediating soils contaminated with heavy metals. Unlike industrial sites, the use of such techniques in agricultural soils requires consideration of not only reducing the mobility of heavy metals but also avoiding adverse effects on soil fertility and the growth of plants. Due to the uncertainty of the stability of amendments applied to agricultural soil, the application of amendments in farmland soil is controversial. This article reviewed the field studies in which amendments were used to immobilize heavy metals, and identified the potential environmental impacts of all aspects of soil amendment usage, including production and processing, transportation, storage, application to soil, long-term stability, and plant absorption. Results of the study indicated that after identifying the environmental risks of the whole process of the application of improvers in agricultural fields, it is necessary to classify the risks according to their characteristics, and design differentiated risk control measures for the safe application of this type of technology.

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Section: Pre-remediationmentioning

confidence: 99%

Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil—A Review

Feng

Cheng²

2023

IJERPH

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“…Illite is a layered 2:1 silicate mineral that is intercalated with a substantial amount of alkaline earth K + and is widely used in ceramics [31]. There are a number of studies on the adsorption of heavy metals by illite [32], while recent studies have shown the outstanding capability of illite in the adsorption of radioactive elements [33][34][35]. Additionally, illite is a potassium-rich aluminosilicate that is advantageous for manufacturing potash fertilizers [36].…”

Section: Introductionmentioning

confidence: 99%

Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils

et al. 2023

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Cadmium pollution in the soil induces significant hazards to agricultural growth and public health. Therefore, new routes are needed to develop low-cost soil amendments that can effectively stabilize cadmium and improve soil fertility. This study introduces modified illite (MIT) with the enhanced ability to stabilize heavy metal Cd through the mixing of illite with calcium carbonate, silicate and sulfate in specific proportions by using the well-known calcination-hydrothermal process. The characterization findings revealed that the modified MIT is predominantly composed of gehlenite and akermanite, with greatly improved specific surface area, pore structure and cation exchange capacity. The main purpose of the present study is to unravel a plausible mechanism on how MIT can stabilize Cd(II) in the soil and to investigate the effect of MIT on the fertility of the contaminated soil. Experiments on soil remediation revealed that MIT has a more profound stabilizing impact on Cd(II) compared to natural illite, resulting in a 22.84% reduction in acid-soluble Cd of the soil when MIT was dosed at 0.5%. The potential mechanism of Cd(II) immobilization by MIT involves the ionic exchange of Cd2+ with the exchangeable Ca2+ and Mg2+. In addition, the hydrolysis products of gehlenite and akermanite are prone to form silicate precipitates with free Cd, leading to soil pH increment. The pot experiments showed that MIT significantly reduces the cadmium content of soil and improves the growth of water spinach organs. Meanwhile, enhancement of the indicators in rhizosphere soil further proved that MIT effectively increases the nutrient content, improves the soil structure and promotes microorganism growth.

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Effects of Soil Amendments on Soil Pb Bioavailability and Pb Absorption by a low-Pb Accumulator Kumquat Grown in Two Types of Pb-Contaminated Soils

Meng

Guo

Yang

et al. 2021

Bull Environ Contam Toxicol

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Effects of adsorption characteristics of different amendments on heavy metals (Pb, Zn, and Cd)

Cited by 11 publications

References 32 publications

Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil—A Review

Whole-Process Risk Management of Soil Amendments for Remediation of Heavy Metals in Agricultural Soil—A Review

Effect of Modified Illite on Cd Immobilization and Fertility Enhancement of Acidic Soils

Effects of Soil Amendments on Soil Pb Bioavailability and Pb Absorption by a low-Pb Accumulator Kumquat Grown in Two Types of Pb-Contaminated Soils

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