Long-term immobilization of cadmium and lead with biochar in frozen-thawed soils of farmland in China

Liu, Mingxuan; Fu, Qiang; Li, Tianxiao; Zhang, Shoujie; Su, Anshuang

doi:10.1016/j.envpol.2022.120143

Cited by 11 publications

(1 citation statement)

References 59 publications

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“…Pb and Cd can inhibit enzyme activity and reduce microbial biomass, ultimately damaging ecological structure and function [5]. They can also affect the absorption of nitrogen, P, and potassium nutrients by crops and inhibit crop growth [6]. Additionally, Pb and Cd can accumulate rapidly in the food chain and can cause severe damage to nerves and kidneys after entering the body [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Mixed-Based Biochar Preparation Process and Adsorption Performance of Lead and Cadmium

Yuan

Wang

et al. 2023

Sustainability

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Irreversible pollution by heavy metals such as lead (Pb) and cadmium (Cd) adversely affects the ecological environment and human health. Due to its high adsorption, microporosity, and specific surface area, biochar possesses excellent potential for use in heavy metal pollution remediation. The preparation of mixed-based biochar from sludge and cotton stalk can solve the problems inherent to pure sludge biochar, such as undeveloped pore structure and a small specific surface area, while resourcefully utilizing both waste biomass types. This study investigated the adsorption capacity for Pb2+ and Cd2+ of mixed-based biochar prepared at different pyrolysis temperatures, different pyrolysis residence times, and different cotton stalks percentages. Response surface experiments revealed the optimum process conditions for preparing mixed-based biochar, which included a pyrolysis temperature of 638 °C, a pyrolysis residence time of 86 min, and an addition ratio of 50% for cotton stalks. The isothermal adsorption experiments revealed that the maximum adsorption capacities of mixed-based biochar for Pb2+ and Cd2+ were 111.11 and 86.21 mg/g, respectively. Our findings suggest the co-pyrolysis of sludge and cotton stalk as a green and sustainable method for safely disposing of Pb and Cd.

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Section: Introductionmentioning

confidence: 99%

Optimization of Mixed-Based Biochar Preparation Process and Adsorption Performance of Lead and Cadmium

Yuan

Wang

et al. 2023

Sustainability

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The longevity evaluation of multi-metal stabilization by MgO in Pb/Zn smelter–contaminated soils

Xu,

et al. 2024

Environ Sci Pollut Res

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Microbial responses towards biochar application in potentially toxic element (PTE) contaminated soil: a critical review on effects and potential mechanisms

Yang,

You,

Liu

et al. 2023

Biochar

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Soil harbors a huge diversity of microorganisms and serves as the ecological and social foundation of human civilization. Hence, soil health management is of utmost and consistent importance, aligning with the United Nations Sustainable Development Goals. One of the most hazardous contaminants in soil matrix is potentially toxic elements (PTEs), which can cause stress in soil indigenous microorganisms and severely jeopardize soil health. Biochar technology has emerged as a promising means to alleviate PTE toxicity and benefit soil health management. Current literature has broadly integrated knowledge about the potential consequences of biochar-amended soil but has focused more on the physical and chemical responses of the soil system than microbiological attributes. In consideration of the indispensable roles of soil microbials, this paper first introduces PTE-induced stresses on soil microbials and then proposes the mechanisms of biochar’s effects on soil microbials. Finally, microbial responses including variations in abundance, interspecific relationships, community composition and biological functions in biochar-amended soil are critically reviewed. This review thus aims to provide a comprehensive scientific view on the effect of biochar on soil microbiological health and its management. Graphical Abstract

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Long-term immobilization of cadmium and lead with biochar in frozen-thawed soils of farmland in China

Cited by 11 publications

References 59 publications

Optimization of Mixed-Based Biochar Preparation Process and Adsorption Performance of Lead and Cadmium

Optimization of Mixed-Based Biochar Preparation Process and Adsorption Performance of Lead and Cadmium

The longevity evaluation of multi-metal stabilization by MgO in Pb/Zn smelter–contaminated soils

Microbial responses towards biochar application in potentially toxic element (PTE) contaminated soil: a critical review on effects and potential mechanisms

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