Immobilization of heavy metals (Cd, Zn, and Pb) in different contaminated soils with swine manure biochar

Yang, Fang; Wang, Bing; Shi, Zhou; Li, Ling; Li, Yang; Mao, Zhiqiang; Liao, Luyun; Zhang, Heng; Wu, Yang Chang

doi:10.1080/26395940.2021.1916407

Cited by 49 publications

(16 citation statements)

References 63 publications

(73 reference statements)

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“…As illustrated in Fig. 3B, the underlying mechanisms primarily included precipitation, ion exchange, π bond action, and complexation on the swine manure biochar (Yang et al 2021b).…”

Section: Heavy Metal Ionsmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

345

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Biochar shows significant potential to serve as a globally applicable material to remediate water and soil owing to the extensive availability of feedstocks and conducive physio-chemical surface characteristics. This review aims to highlight biochar production technologies, characteristics of biochar, and the latest advancements in immobilizing and eliminating heavy metal ions and organic pollutants in soil and water. Pyrolysis temperature, heat transfer rate, residence time, and type of feedstock are critical influential parameters. Biochar’s efficacy in managing contaminants relies on the pore size distribution, surface groups, and ion-exchange capacity. The molecular composition and physical architecture of biochar may be crucial when practically applied to water and soil. In general, biochar produced at relatively high pyrolysis temperatures can effectively manage organic pollutants via increasing surface area, hydrophobicity and microporosity. Biochar generated at lower temperatures is deemed to be more suitable for removing polar organic and inorganic pollutants through oxygen-containing functional groups, precipitation and electrostatic attraction. This review also presents the existing obstacles and future research direction related to biochar-based materials in immobilizing organic contaminants and heavy metal ions in effluents and soil. Graphical Abstract

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“…As illustrated in Fig. 3B, the underlying mechanisms primarily included precipitation, ion exchange, π bond action, and complexation on the swine manure biochar (Yang et al 2021b).…”

Section: Heavy Metal Ionsmentioning

confidence: 99%

Biochar for the removal of contaminants from soil and water: a review

Qiu

Liu

Ling

et al. 2022

Biochar

345

View full text Add to dashboard Cite

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“…Therefore, the remediation potential of biochar cannot be denied. In fact, biochar is an excellent sorbent for Cd 2+ and a solid residue of biomass pyrolysis under low oxygen conditions, which has a poly-aromatic and microporous structure, diverse surface functional groups, and a strong cation exchange capacity [ 41 , 42 ]. Although the DTPA-Cd had no change under the BC treatment for methodological reasons, BC remains a potential material.…”

Section: Resultsmentioning

confidence: 99%

Calcareous Materials Effectively Reduce the Accumulation of Cd in Potatoes in Acidic Cadmium-Contaminated Farmland Soils in Mining Areas

Gong

Wang²,

Lou

et al. 2022

IJERPH

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The in situ chemical immobilization method reduces the activity of heavy metals in soil by adding chemical amendments. It is widely used in farmland soil with moderate and mild heavy metal pollution due to its high efficiency and economy. However, the effects of different materials depend heavily on environmental factors such as soil texture, properties, and pollution levels. Under the influence of lead–zinc ore smelting and soil acidification, Cd is enriched and highly activated in the soils of northwestern Guizhou, China. Potato is an important economic crop in this region, and its absorption of Cd depends on the availability of Cd in the soil and the distribution of Cd within the plant. In this study, pot experiments were used to compare the effects of lime (LM), apatite (AP), calcite (CA), sepiolite (SP), bentonite (BN), and biochar (BC) on Cd accumulation in potatoes. The results showed that the application of LM (0.4%), AP (1.4%), and CA (0.4%) had a positive effect on soil pH and cations, and that they effectively reduced the availability of Cd in the soil. In contrast, the application of SP, BN, and BC had no significant effect on the soil properties and Cd availability. LM, AP, and CA treatment strongly reduced Cd accumulation in the potato tubers by controlling the total ‘flux’ of Cd into the potato plants. In contrast, the application of SP and BN promoted the migration of Cd from the root to the shoot, while the effect of BC varied by potato genotype. Overall, calcareous materials (LM, CA, and AP) were more applicable in the remediation of Cd-contaminated soils in the study area.

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“…42 The pH increase induced by the BC application in soil was reported to enhance cationic metal binding on Fe-Mn oxides due to less competition for H + (ref. 47) but might provoke anionic metal(loid) release. 48 3.1.3. nZVI-treated samples.…”

Section: Investigations By Sem/edsmentioning

confidence: 99%