Microwave physicochemical activation: an advanced approach to produce activated biochar for palm oil mill effluent treatment

Kong, Kew Kiong; Yek, Peter Nai Yuh; Sii, How Sing; Lee, Man Djun; Liew, Rock Keey; Lam, Su Shiung

doi:10.1007/s42768-022-00115-1

Cited by 2 publications

(2 citation statements)

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“…Biochar not only increases the organic matter content of the soil but also promotes plant growth (Cen et al., 2021). Modification of biochar using an alkaline substance (NaOH) expands the pore structure of the biochar surface (Kong et al., 2022). g‐C 3 N 4 , a metal‐free polymer semiconductor photocatalyst, has been added to the biochar as a photocatalyst.…”

Section: Resultsmentioning

confidence: 99%

“…The biochar production technology is simple and cost‐effective. As a soil conditioner, biochar improves microbial activity, soil water retention and crop yield while reducing the need for fertilizers and minimizing nutrient loss (Kong et al., 2022; Purkaystha et al., 2022). Compared with other physical and chemical remediation materials, biochar is easy to apply and does not result in secondary pollution.…”

Section: Resultsmentioning

confidence: 99%

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Soil health assessment of an acidic red soil agricultural area and its restoration with biochar soil conditioners

Li,

Jiang,

Lyu

2023

Soil Use and Management

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In light of growing concerns regarding food security and soil health, there is increasing emphasis on the assessment of soil health and efforts to improve or maintain the soil health of cultivated land. This case study Niutian Town in Jiangxi Province in southern China was selected as a typical red soil and a major grain‐producing area. This research involves an integrated evaluation model based on Entropy weight TOPSIS and emergy analysis to assess the soil health of cultivated land. An evaluation system was developed, comprising 31 indicators selected on the basis of resources and environments, with an emphasis on sensitive and promising microorganisms category indicators. Additionally, experiments were conducted to assess the ecological risk of soil pollution and develop novel soil conditioners. Our results indicate that Pb, Hg and Cd present a moderate ecological risk on 92.1% of the cultivated land. Furthermore, 56.8% of the cultivated land was ‘sub‐healthy’ or ‘unhealthy’. Biochar was found to be a soil conditioner with a good adsorption effect, with absorption rates reaching up to 99.9% and 88.3% for Pb and Cd, respectively. Additionally, g‐C3N4 was added to address pesticide contamination, which showed an adsorption rate of up to 75.2% for atrazine. This work develops a targeted remediation approach based on assessment results to address regional cropland soil health issues.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%