A porous biochar supported nanoscale zero-valent iron material highly efficient for the simultaneous remediation of cadmium and lead contaminated soil

Qian, Wei; Liang, Jing-Yi; Zhang, Wenxuan; Huang, Shi-Ting; Diao, Zeng-Hui

doi:10.1016/j.jes.2021.06.014

Cited by 94 publications

(12 citation statements)

References 35 publications

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“…Nanoscale zero-valent iron modified porous biochar (BC-nZVI) was used for the simultaneous remediation of Pb and Cd spiked soil. Figure 3C shows the immobilizing of Pb or Cd via the BC-nZVI method produced superior outcomes than that of BC or nZVI process, and nearly 80% of heavy metal ions was immobilized by the BC-nZVI (Qian et al 2022). Stable Cd species such as CdCO 3 , Cd(OH) 2 , and CdO were created, meanwhile, stable Pb species including PbO, Pb(OH) 2 , and PbCO 3 were produced via the BC-nZVI process.…”

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

376

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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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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

376

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“…Several recent investigations have indicated that a promising, highly reactive material known as nano-zero-valent iron may be exploited for inorganic pollution remediation (Diao et al 2020a , b , 2021 ; Li et al 2018b ). Qian et al ( 2022 ) combined the latter material with biochar for cadmium and lead immobilisation in contaminated soil, achieving a stabilisation efficiency of 80%.…”

Section: Environmental Remediationmentioning

confidence: 99%

Biochar for agronomy, animal farming, anaerobic digestion, composting, water treatment, soil remediation, construction, energy storage, and carbon sequestration: a review

et al. 2022

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In the context of climate change and the circular economy, biochar has recently found many applications in various sectors as a versatile and recycled material. Here, we review application of biochar-based for carbon sink, covering agronomy, animal farming, anaerobic digestion, composting, environmental remediation, construction, and energy storage. The ultimate storage reservoirs for biochar are soils, civil infrastructure, and landfills. Biochar-based fertilisers, which combine traditional fertilisers with biochar as a nutrient carrier, are promising in agronomy. The use of biochar as a feed additive for animals shows benefits in terms of animal growth, gut microbiota, reduced enteric methane production, egg yield, and endo-toxicant mitigation. Biochar enhances anaerobic digestion operations, primarily for biogas generation and upgrading, performance and sustainability, and the mitigation of inhibitory impurities. In composts, biochar controls the release of greenhouse gases and enhances microbial activity. Co-composted biochar improves soil properties and enhances crop productivity. Pristine and engineered biochar can also be employed for water and soil remediation to remove pollutants. In construction, biochar can be added to cement or asphalt, thus conferring structural and functional advantages. Incorporating biochar in biocomposites improves insulation, electromagnetic radiation protection and moisture control. Finally, synthesising biochar-based materials for energy storage applications requires additional functionalisation.

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“…Numerous recent studies have focused on immobilization and stabilization of metals. 20,32,39,65 However, the performance of MO-CAg in immobilizing HMs, particularly in situ, is not completely understood. Hence, the main objectives of this study are to (1) evaluate the performance of MO-CAg in immobilization and stabilization of Pb-and Cd-contaminated soils and compare it with coconut coil bers biochar (CCFB) and CAg; (2) evaluate the stability of the immobilized Cd and Pb in systems amended with MO-CAg and compare them with CCFB and CAg by performing acid rain leaching tests; and (3) explore the immobilization mechanisms of Pb and Cd onto MO-CAg in soils using Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and Brunauer-Emmett-Teller (BET) analyses, as well as with Density Functional Theory (DFT) calculations, thereby providing insights on the atomic bonding of metals onto MO-CAg.…”

Section: Introductionmentioning

confidence: 99%