Synthesizing biochar-based fertilizer with sustained phosphorus and potassium release: Co-pyrolysis of nutrient-rich chicken manure and Ca-bentonite

Piash, Mahmudul Islam; Iwabuchi, Kazunori; Itoh, Takanori

doi:10.1016/j.scitotenv.2022.153509

Cited by 28 publications

(11 citation statements)

References 33 publications

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“…The nano-MgO biochar composite derived from lotus pods co-pyrolysed with magnesium citrate showed a P capture capacity of 452.75 mg/g (Zhu et al 2021). In addition, the co-pyrolysis of chicken manure and calcium bentonite mixture produced P-rich slowrelease carbon-based fertilisers for usage in soil (Piash et al 2022). These studies demonstrated that the direct co-pyrolysis of metal-rich minerals with biomass is a feasible low-cost method for producing metal-biochar (An et al 2020;Deng et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of MgO hybrid biochar and its mechanism for high efficient recovery of phosphorus from aqueous media

Fang

Ali

Gao

et al. 2022

Biochar

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Conversion of organic waste into engineered metal-biochar composite is an effective way of enhancing biochar’s efficiency for adsorptive capture of phosphorus (P) from aqueous media. Thus, various strategies have been created for the production of metal-biochar composites; however, the complex preparation steps, high-cost metal salt reagent application, or extreme process equipment requirements involved in those strategies limited the large-scale production of metal-biochar composites. In this study, a novel biochar composite rich in magnesium oxides (MFBC) was directly produced through co-pyrolysis of magnesite with food waste; the product, MFBC was used to adsorptively capture P from solution and bio-liquid wastewater. The results showed that compared to the pristine food waste biochar, MFBC was a uniformly hybrid MgO biochar composite with a P capture capacity of 523.91 mg/g. The capture of P by MFBC was fitted using the Langmuir and pseudo-first-order kinetic models. The P adsorptive capture was controlled by MgHPO4 formation and electrostatic attraction, which was affected by the coexisting F− and CO32− ions. MFBC could recover more than 98% of P from the solution and bio-liquid wastewater. Although the P-adsorbed MFBC showed very limited reusability but it can be substituted for phosphate fertiliser in agricultural practices. This study provided an innovative technology for preparing MgO-biochar composite against P recovery from aqueous media, and also highlighted high-value-added approaches for resource utilization of bio-liquid wastewater and food waste. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of MgO hybrid biochar and its mechanism for high efficient recovery of phosphorus from aqueous media

Fang

Ali

Gao

et al. 2022

Biochar

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“…Increasing the dose to 500 kg/ha significantly increased plant height, but subsequent dose increases up to 750 kg/ha did not increase plant height. The release of nutrients in different media shows the average release of P and K in coarse sand, respectively, is 38% and 24% higher than in clay loam and substantially greater N release (49%) [11].…”

Section: Discussionmentioning

confidence: 95%

Application of inorganic fertilizer NK (18-32) on growth and yield of sweet corn on clay soil

Sugiono,

Latifah,

Krismawati

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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To determine the effectiveness and efficiency of the application of inorganic compound fertilizer NK (18-32) on sweet corn, an experiment was conducted at the experimental garden in Malang, East Java, Indonesia, starting from March to June 2020. The study was arranged in a single-factor RBD with ten treatments and three replications. The treatments were a combination of doses of NK compound fertilizer, a single fertilizer as a comparison, and a control (without fertilizer). Besides control, all treatments were given P fertilizer at a dose of 100 kg/ha. The result showed that doses of 500-750 kg/ha of NK compound fertilizer significantly increased the growth and yield of the sweet corn plant. Each 10 kg dose increase of NK fertilizer will increase the total dry weight of the plant by 1.3055 g and give a yield of 12.57–13.64 tons/ha of fresh cobs. This result is equivalent to the yield of standard N-K single fertilizer (350 kg/ha Urea + 75 kg/ha). The dose of NK compound fertilizer of 125-250 kg/ha was proven to be able to substitute 100% KCl fertilizer (75 kg/ha). The RAE value of 750 kg/ha of NK fertilizer was 105.99 % higher than the standard/comparative single fertilizer. The combination of 125 kg/ha NK fertilizer + 250 kg/ha Urea and 250 kg/ha NK fertilizer + 100 kg/ha Urea, respectively, resulted in a RAE 3.91% and 1.00% higher than the standard fertilizer. Fertilization can improve the quality of sweet corn, namely the level of sweetness increases. NK (18-32) fertilizer doses of 500-750 kg/ha significantly increased the sweetness level of seed corn from 11.17% (without fertilizer) to 15.25-15.25%.

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“…The positive effect on the overall nutrient level in the soil is caused by the concentration of nutrients in biochar during pyrolysis, the shifting of adsorption-desorption balance in soil that decreases nutrient fixation, the external sources of nutrients incorporated in biochar, including minerals, clays, and compost, and the prevention of nutrient leaching to groundwater. Phosphorus fixation in soil requires coexisting cations of aluminium, iron, silica, calcium, and magnesium (Piash et al 2022).…”

Section: Biochar Production Methodsmentioning

confidence: 99%

Machine learning and computational chemistry to improve biochar fertilizers: a review

Osman,

Zhang,

Lai

et al. 2023

Environ Chem Lett

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Traditional fertilizers are highly inefficient, with a major loss of nutrients and associated pollution. Alternatively, biochar loaded with phosphorous is a sustainable fertilizer that improves soil structure, stores carbon in soils, and provides plant nutrients in the long run, yet most biochars are not optimal because mechanisms ruling biochar properties are poorly known. This issue can be solved by recent developments in machine learning and computational chemistry. Here we review phosphorus-loaded biochar with emphasis on computational chemistry, machine learning, organic acids, drawbacks of classical fertilizers, biochar production, phosphorus loading, and mechanisms of phosphorous release. Modeling techniques allow for deciphering the influence of individual variables on biochar, employing various supervised learning models tailored to different biochar types. Computational chemistry provides knowledge on factors that control phosphorus binding, e.g., the type of phosphorus compound, soil constituents, mineral surfaces, binding motifs, water, solution pH, and redox potential. Phosphorus release from biochar is controlled by coexisting anions, pH, adsorbent dosage, initial phosphorus concentration, and temperature. Pyrolysis temperatures below 600 °C enhance functional group retention, while temperatures below 450 °C increase plant-available phosphorus. Lower pH values promote phosphorus release, while higher pH values hinder it. Physical modifications, such as increasing surface area and pore volume, can maximize the adsorption capacity of phosphorus-loaded biochar. Furthermore, the type of organic acid affects phosphorus release, with low molecular weight organic acids being advantageous for soil utilization. Lastly, biochar-based fertilizers release nutrients 2–4 times slower than conventional fertilizers.

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Synthesizing biochar-based fertilizer with sustained phosphorus and potassium release: Co-pyrolysis of nutrient-rich chicken manure and Ca-bentonite

Cited by 28 publications

References 33 publications

Preparation and characterization of MgO hybrid biochar and its mechanism for high efficient recovery of phosphorus from aqueous media

Preparation and characterization of MgO hybrid biochar and its mechanism for high efficient recovery of phosphorus from aqueous media

Application of inorganic fertilizer NK (18-32) on growth and yield of sweet corn on clay soil

Machine learning and computational chemistry to improve biochar fertilizers: a review

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