Iron-modified rice husk hydrochar and its immobilization effect for Pb and Sb in contaminated soil

Teng, Fengyun; Zhang, Yaxin; Wang, Dequan; Shen, Maocai; Hu, Duofei

doi:10.1016/j.jhazmat.2020.122977

Cited by 70 publications

(20 citation statements)

References 50 publications

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“…In this study, the addition of Si-rich materials to soils contaminated with multiple heavy metals positively affected wheat growth. Recently, soil amendments made of biomass-derived waste materials have gained broad interest due to their several abilities, such as improving soil fertility [52], up-regulating antioxidant defense system [33], and immobilizing soil pollutants [53,54]. Hence, these bio-amendments can be used to limit the mobility and toxicity of contaminants [8,13] to promote plant growth [32].…”

Section: Discussionmentioning

confidence: 99%

Silicon-Rich Materials Detoxify Multiple Heavy Metals in Wheat by Regulating Oxidative Stress and Heavy Metal Subcellular Distribution

Li¹,

Yuan²,

Liu³

et al. 2022

Preprint

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Silicon is an essential trace nutrient for plant growth and is frequently employed to remediate soils contaminated with heavy metals in agriculture. However, silicon’s role and mechanism in reducing heavy metal toxicity have not been well understood, especially for multi-heavy metals. In this study, the effects of silicon-rich materials (silicate, rice husk biochar (RHB), and bentonite) on growth trait, antioxidant response, and heavy metal accumulation and distribution of wheat grown in two soils polluted by multiple heavy metals (Cd, Zn, Pb, and As) were investigated. The results revealed that the addition of silicon-rich materials enhanced plant growth, improved the photosynthetic attributes in leaf tissues, and decreased the contents of Cd, Zn, Pb, and As in wheat shoots and grains. The examination of the subcellular distribution of heavy metals in plants implied that silicon-rich materials transferred heavy metals as intracellular soluble fractions to the cell walls, indicating the reduction of mobility and toxicity of heavy metals in the plants. In addition, the application of the silicon-rich materials reduced oxidative damage in plants by downregulating plant antioxidant response systems and decreasing the production of malondialdehyde (MDA), ascorbic acid (AsA), and glutathione (GSH). Moreover, fractionation analysis of soil heavy metals showed that silicon-rich amendments could convert bioavailable heavy metals into immobilized forms. The results indicated that silicon-rich materials could remediate multi-heavy metal-polluted soils and promote wheat production.

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Section: Discussionmentioning

confidence: 99%

Silicon-Rich Materials Detoxify Multiple Heavy Metals in Wheat by Regulating Oxidative Stress and Heavy Metal Subcellular Distribution

Li¹,

Yuan²,

Liu³

et al. 2022

Preprint

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“…As mentioned in section 3.2, the upper sediments were infiltrated by BC and nFe 2 O 3 @BC. Accordingly, the infiltration of BC and nFe 2 O 3 @BC could reduce Cd release from sediment to porewater via immobilization effect (Gao et al, 2020;Teng et al, 2020). Furthermore, BC and nFe 2 O 3 @BC capping could partly alleviate the influence of overlying water pH on sediment pH (Fig.…”

Section: The Effects Of Ph On CD Variations In Overlying Water and Po...mentioning

confidence: 99%

Efficacy of in situ active capping Cd highly contaminated sediments with nano-Fe2O3 modified biochar

Liu

Sheng

Liu

2021

Environmental Pollution

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“…Typical functional groups on hydrochar can be optimized for increasing their adsorptive capacity or removing selective contaminants. It can be effectively achieved by altering physicochemical properties with additional activation steps (Peng et al, 2019;Teng et al, 2020;Çatlıoğlu et al, 2020;Mittapalli et al, 2021).…”

Section: Hydrochar and Water Qualitymentioning

confidence: 99%

Hydrochar: A Promising Step Towards Achieving a Circular Economy and Sustainable Development Goals

et al. 2022

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The United Nations 17 Sustainable Development Goals (SDGs) are a universal call to action to end poverty, protect the environment, and improve the lives and prospects of everyone on this planet. However, progress on SDGs is currently lagging behind its 2030 target. The availability of water of adequate quality and quantity is considered as one of the most significant challenges in reaching that target. The concept of the ‘Circular Economy’ has been termed as a potential solution to fasten the rate of progress in achieving SDGs. One of the promising engineering solutions with applications in water treatment and promoting the concept of the circular economy is hydrochar. Compared to biochar, hydrochar research is still in its infancy in terms of optimization of production processes, custom design for specific applications, and knowledge of its water treatment potential. In this context, this paper critically reviews the role of hydrochar in contributing to achieving the SDGs and promoting a circular economy through water treatment and incorporating a waste-to-value approach. Additionally, key knowledge gaps in the production and utilization of engineered hydrochar are identified, and possible strategies are suggested to further enhance its water remediation potential and circular economy in the context of better natural resource management using hydrochar. Research on converting different waste biomass to valuable hydrochar based products need further development and optimization of parameters to fulfil its potential. Critical knowledge gaps also exist in the area of utilizing hydrochar for large-scale drinking water treatment to address SDG-6.

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Iron-modified rice husk hydrochar and its immobilization effect for Pb and Sb in contaminated soil

Cited by 70 publications

References 50 publications

Silicon-Rich Materials Detoxify Multiple Heavy Metals in Wheat by Regulating Oxidative Stress and Heavy Metal Subcellular Distribution

Silicon-Rich Materials Detoxify Multiple Heavy Metals in Wheat by Regulating Oxidative Stress and Heavy Metal Subcellular Distribution

Efficacy of in situ active capping Cd highly contaminated sediments with nano-Fe2O3 modified biochar

Hydrochar: A Promising Step Towards Achieving a Circular Economy and Sustainable Development Goals

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