Crayfish shell biochar modified with magnesium chloride and its effect on lead removal in aqueous solution

Zhang, Jiaqi; Hu, Xiaolan; Yan, Jinpeng; Li, Long; Xue, Yingwen

doi:10.1007/s11356-020-07631-9

Cited by 28 publications

(3 citation statements)

References 36 publications

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“…The greater N accumulation in grain and straw by biochar‐embedded fertilizers, in this study, also favoured increased uptake of P and K, showing better nutrient availability in BSRNFs (Takakai et al, 2017). These results are in line with the findings of Huang et al (2014) and Zhang et al (2020), who reported the addition of biochar‐based fertilizer improves NUE and modifies soil N dynamics.…”

Section: Discussionsupporting

confidence: 92%

Synthesis of biochar‐embedded slow‐release nitrogen fertilizers: Mesocosm and field scale evaluation for nitrogen use efficiency, growth and rice yield

Firnass

Kannan

Swaminathan

et al. 2023

Soil Use and Management

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Increasing consideration is being paid to sustainable slow release fertilizers (SRFs). Biochar is a novel carbon material, and gaining momentum as a natural carrier for sustainable nutrient application and release and improved soil health. Accordingly, a recent biochar‐embedded slow‐release nitrogen (N) fertilizer has been prepared using acacia biochar, urea, ammonium chloride, starch and organic acid. This and other biochar‐embedded slow release N fertilizers (BSRNFs) were characterized using Fourier transform infrared spectroscopy (FT‐IR) and scanning electron microscope (SEM). BSRNFs were tested in the laboratory and field experiments for their N release pattern, nitrate (NO3‐N) leaching loss, N use efficiency (NUE), growth and yield of rice crops. Among the BSRNFs tested, the one with 75% urea‐N (BSRNF‐U75) released 109 mg kg‐1 of N ( in an incubation study and the least NO3‐N leaching losses (8.8, 14.6, and 26.4 mg kg‐1) at 10, 20 and 30 cm depth in a column study, respectively compared to conventional urea. Application of biochar‐embedded slow release N fertilizer 100% urea‐N (BSRNF‐U100) augmented plant growth to increase grain yield (6610 kg ha‐1), straw yield (9612 kg ha‐1) and NUE (12%) in rice.

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Section: Discussionsupporting

confidence: 92%

Synthesis of biochar‐embedded slow‐release nitrogen fertilizers: Mesocosm and field scale evaluation for nitrogen use efficiency, growth and rice yield

Firnass

Kannan

Swaminathan

et al. 2023

Soil Use and Management

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“…Laboratory trials have been carried out using strong acids such as HNO 3 and H 2 SO 4 (Liu et al 2012; and weak organic acids such as citric and malic acids (Heaney et al 2020;Lonappan et al 2020). Most base treatments have been carried out using NaOH and KOH (Liu et al 2012;Petrovic et al 2016) and salt treatments have relied on chlorides (Zhang et al 2020a).…”

Section: Improvement Through Acid and Base Treatments And Oxidationsmentioning

confidence: 99%

Enhancing plant N uptake with biochar-based fertilizers: limitation of sorption and prospects

et al. 2022

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Background Biochar-based fertilizer products (BCF) have been reported to increase both crop yield and N-use efficiency. Such positive effects are often assumed to result from the slow-release of N adsorbed on BCF structures. However, a careful review of the literature suggests that actual mechanisms remain uncertain, which hampers the development of efficient BCF products. Scope Here, we aim at reviewing BCF mechanisms responsible for enhanced N uptake by plants, and evaluate the potential for further improvement. We review the capacity of biochar structures to adsorb and release N forms, the biochar properties supporting this effect, and the methods that have been proposed to enhance this effect. Conclusions Current biochar products show insufficient sorption capacity for the retention of N forms to support the production of slow-release BCFs of high enough N concentration. Substantial slow-release effects appear to require conventional coating technology. Sorption capacity can be improved through activation and additives, but currently not to the extent needed for concentrated BCFs. Positive effects of commercial BCFs containing small amount of biochar appear to result from pyrolysis-derived biostimulants. Our review highlights three prospects for improving N retention: 1) sorption of NH3 gas on specifically activated biochar, 2) synergies between biochar and clay porosities, which might provide economical sorption enhancement, and 3) physical loading of solid N forms within biochar. Beyond proof of concept, quantitative nutrient studies are needed to ascertain that potential future BCFs deliver expected effects on both slow-release and N use efficiency.

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“…The exchangeable metal cations (e.g., Ca 2+ , Mg 2+ , K + ) were retained on the surface of biochar through electrostatic attraction on -COOH or -OH groups, and then exchanged with Cd 2+ during the adsorption process (Deng et al, 2018). The SBET of biochar was greatly raised by MgCl2 modification, which might have promoted the above ion exchange reaction (Zhang et al, 2020a).…”

Section: Ion Exchangementioning

confidence: 99%

Quantitative analysis on the mechanism of Cd2+ removal by MgCl2-modified biochar in aqueous solutions

Yin

Lin

Chen

et al. 2021

Journal of Hazardous Materials

107

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Crayfish shell biochar modified with magnesium chloride and its effect on lead removal in aqueous solution

Cited by 28 publications

References 36 publications

Synthesis of biochar‐embedded slow‐release nitrogen fertilizers: Mesocosm and field scale evaluation for nitrogen use efficiency, growth and rice yield

Synthesis of biochar‐embedded slow‐release nitrogen fertilizers: Mesocosm and field scale evaluation for nitrogen use efficiency, growth and rice yield

Enhancing plant N uptake with biochar-based fertilizers: limitation of sorption and prospects

Quantitative analysis on the mechanism of Cd2+ removal by MgCl2-modified biochar in aqueous solutions

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