Preparation and application of biochar from co-pyrolysis of different feedstocks for immobilization of heavy metals in contaminated soil

Lian, Wanli; Shi, Wei; Tian, Shuai; Gong, Xueliu; Yu, Qiuyu; Lu, Haifei; Liu, Zhiwei; Zheng, Jufeng; Wang, Yan; Bian, Rongjun; Li, Lianqing; Pan, Genxing

doi:10.1016/j.wasman.2023.03.022

Cited by 13 publications

(6 citation statements)

References 52 publications

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“…The yield of co-biochar was in close agreement with some previous studies produced cobiochar with sewage sludge and sawdust at the ratio of 1:1 (pyrolyzed at 400 ºC) and observed 44.51% yield (11). A study produced co-biochar with wheat straw, rice husk, pig manure and oyster shells at the ratio of 3:3:3:1 (pyrolyzed at 450 ºC) and found 42.3% yield of the cobiochar (7). The biochar surface area ranged from 164.87±1.85% (for RSB) to 205.40±3.2% (for WHB).…”

Section: Physical and Physico-chemical Properties Of Biocharssupporting

confidence: 90%

“…Amending the cropland with biochar might increase water holding capacity (WHC) and cation exchange capacity (CEC) and disease resistance of plants due to high surface area (SA) and high porosity. Biochar has been serving as an agent for both soil remediation (since it is a cost-effective carbon-based absorbent having high active functional groups) and carbon sequestration (7).…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the Acceptance and Adoption Dynamics of Biochar and Co-biochar as a Sustainable Soil Amendment

Khatun,

Hossain,

Joardar

2024

Plant Sci. Today

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Biochar, a carbonized biomass, can be used as a soil amendment for improving soil fertility and productivity as well as ensuring agricultural sustainability. Biochar can be produced from different materials and at different conditions, so its quality varies greatly as a soil amendment. In this respect, the present study aimed to explore the effectiveness of 4 biochars as a soil ameliorator for securing soil health. The biochars were produced from 3 different biomasses viz., rice straw, sawdust and water hyacinth and their mixture (co-biochar at 1:1:1) at 400 ºC. The biomasses and the biochars were characterized and the results revealed that conversion of biomasses into biochars caused a significant (p<0.05) increase in almost all of the biochar properties. Among the 4 biochars, water hyacinth biochar showed higher ash content, water holding capacity, surface area and total P, K, S, Ca and Zn. So, water hyacinth biochar could be a better choice as a soil amendment than the other three biochars. However, rice straw biochar showed higher cation exchange capacity (CEC), total N and Na and conversion efficiency of C, N, P, K, Na and Zn. Whereas, the co-biochar illustrated higher yield and showed the second highest in fixed C, CEC, total S, Ca and Zn and also in conversion efficiency of C, P, S, Na, K and Ca. Finally, it can be assumed to produce a co-biochar using rice straw at a higher ratio which might have a high potential for C storage and for supplying all of the essential plant nutrients.

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Section: Physical and Physico-chemical Properties Of Biocharssupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Quantifying the Acceptance and Adoption Dynamics of Biochar and Co-biochar as a Sustainable Soil Amendment

Khatun,

Hossain,

Joardar

2024

Plant Sci. Today

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“…(5) The pyrolysis process of the simulation process reaches equilibrium; (6) Gas-phase products with CO, CH4, CO2, H2, C2H4, C2H6, C3H6, and C3H8, and these eight products were replaced. (7) According to the results of GC-MS, the pyrolysis oil was replaced with seven model compounds, including phenol (C6H6O), pentene (C5H10), pentane (C5H12), ethanol (C2H5OH), acetone (CH3COCH3), benzene (C6H6), and methyl acetate (C3H6O2) [20,21].…”

Section: Model Building Assumptionsmentioning

confidence: 99%

“…Biomass is a kind of clean and renewable energy, which can achieve zero carbon emission in the utilization process and reduce the emission of SO X and NO X , thus reducing the pollution to the environment [4][5][6]. In recent years, the co-pyrolysis technology of biomass and coal has been widely studied by scholars, which is regarded as an effective way to improve the energy quality and utilization efficiency of coal and to solve the problem of environmental pollution [7][8][9]. Coal-biomass co-pyrolysis can not only reduce the use of fossil energy and reduce greenhouse gas emissions but also improve the yield of pyrolysis oil with high calorific value in the pyrolysis products.…”

Section: Introductionmentioning

confidence: 99%

Study on Co-Pyrolysis of Coal and Biomass and Process Simulation Optimization

Wang,

Liu,

Wang

et al. 2023

Sustainability

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In this paper, the optimal process conditions for coal–biomass co-pyrolysis were obtained through pyrolysis experiments. The results show that under the condition of the pyrolysis temperature of 500 °C, the pyrolysis oil yield and positive synergistic effect reach the maximum, and the ratio of coal to biomass raw materials is 1:3. The effects of three loading methods (coal loading on biomass, biomass loading on coal, and coal–biomass mixing) on the distribution of simulated products of coal–biomass co-pyrolysis were constructed using Aspen Plus V11 software. The experimental results of pyrolysis carbon, pyrolysis oil, pyrolysis gas, and water under three different ratios are close to the simulation results, and the maximum error is 8%. This indicates that the model is dependent. This paper analyzes the economic situation in terms of investment in factory construction, raw material collection, product production, and product sales. The results show that when the processing scale is 9 tons h−1, the pyrolysis plant can be profitable in the first year. This study provides basic data and the basis for the commercialization investment of coal–biomass co-pyrolysis technology.

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“…The phytoavailability of Cd, Pb, and Cu was lowered in acidic soil by adding biochar made from green waste . Several studies using different biochars have been reported for metal immobilization in soil. − However, utilization of biochar for combined evaluation of CO 2 sequestration and heavy metal remediation in contaminated soils are less reported. Thus, in this study, the comprehensive potential of biochar for soil CO 2 sequestration, enhancing soil health, and remediating heavy metal contamination in soils is explored.…”

Section: Introductionmentioning

confidence: 99%

Harnessing Biochar in Contaminated Soil for Heavy Metal Immobilization, Soil Health Enhancement, and Carbon Sequestration

Mohan,

Abhishek,

Patel

et al. 2024

Ind. Eng. Chem. Res.

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Biochar was employed for Cd(II) and Cr(VI) immobilization while simultaneously sequestering carbon in soil. Biochar application also improved soil fertility, raised carbon, and improved chili (Capsicum annum) crop production versus control soil. Tea residue biochar (TRBC) and paddy straw biochar (PSBC) were prepared by pyrolyzing used tea residue biomass (TRBM) and paddy straw biomass (PSBM) at 650°C and 550°C, respectively, under a nitrogen atmosphere. Both pyrolysis processes were carried out under N2. TRBC and PSBC characterization was accomplished by combining X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy, elemental analysis, and S BET surface area determinations. The TRBC and PSBC were applied to contaminated soil to investigate the Cr(VI) and Cd(II) immobilization. Soils amended with tea residue and paddy straw biomass were compared to TRBC- and PSBC-amended soils. Both raw biomass and their corresponding biochars were combined in different amounts in controlled incubations conducted for 168 days to investigate their CO2 emission sequestration potential. In biochar-amended soils, there was a marked increase in both cation exchange capacity and total organic carbon levels, accompanied by a significant reduction in soil CO2 emission flux versus soils amended with tea residue and paddy straw biomass. Sequential extractions were conducted to study Cr(VI) and Cd(II) immobilization in both biochar-amended soils. TRBC and PSBC addition to soil converts substantial amounts of exchangeable Cr(VI) and Cd(II) fractions to immobilized forms (iron–manganese, bound to organic material, and residual fractions). This provides both immobilization and toxicity reduction. Adsorption and metal reduction dominated Cr(VI) and Cd(II) immobilization. TRBC and PSBC application enhanced the chili (C. annum) plant growth (heights, leaf numbers, fresh weights and dry weights). This work highlighted the TRBC and PSBC potential as sustainable amendments that will simultaneously immobilize Cr(VI) and Cd(II), sequester carbon, and enhance soil fertility.

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Preparation and application of biochar from co-pyrolysis of different feedstocks for immobilization of heavy metals in contaminated soil

Cited by 13 publications

References 52 publications

Quantifying the Acceptance and Adoption Dynamics of Biochar and Co-biochar as a Sustainable Soil Amendment

Quantifying the Acceptance and Adoption Dynamics of Biochar and Co-biochar as a Sustainable Soil Amendment

Study on Co-Pyrolysis of Coal and Biomass and Process Simulation Optimization

Harnessing Biochar in Contaminated Soil for Heavy Metal Immobilization, Soil Health Enhancement, and Carbon Sequestration

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