Effect of pyrolysis temperature on characteristics, chemical speciation and environmental risk of Cr, Mn, Cu, and Zn in biochars derived from pig manure

Shen, Xiaoxu; Zeng, Jianfei; Zhang, Deli; Wang, Fang; Li, Yongjun; Yi, Weiming

doi:10.1016/j.scitotenv.2019.135283

Cited by 79 publications

(21 citation statements)

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“…Biochar is a stable carbon-rich product obtained from the thermochemical decomposition of organic biomasses in an oxygen-limited condition and has attracted extensive attention because of its role in environmental improvement (Lehmann et al, 2011;Joseph et al, 2015;Kumar et al, 2021). As it generally has excellent properties, including high stability (Duan et al, 2021), large specific surface area (Luo et al, 2019;Shen et al, 2019), and abundant surface functional groups (Akdeniz, 2019;Chen et al, 2019), biochar is now increasingly used as a soil amendment (Bilias et al, 2021). To date, it has been reported to affect various parameters, including N (Borchard et al, 2014), total phosphorus (P) (Zhang et al, 2016), pH (Haque et al, 2021), soil organic matter (OM) content (Laskosky et al, 2020), microorganisms (Ren et al, 2020), organic carbon (OC) (Zhang et al, 2021), alter crop yield (Hossain et al, 2010;Sun et al, 2014;Ye et al, 2019), and water holding capacity (Yu et al, 2013), and alleviate abiotic stress (Lashari et al, 2014;Akhtar et al, 2015;Razzaghi et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of different biochar particle sizes together with bio-organic fertilizer on rhizosphere soil microecological environment on saline–alkali land

Zhang

Liang

et al. 2022

Front. Environ. Sci.

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The application of biochar and bio-organic fertilizers (BOFs) is effective for improving soil ecological environments. However, soil physicochemical properties and the microbiome diversity of rhizosphere soil after the application of different-sized particles of biochar together with BOF in saline–alkali land have not been thoroughly described. A field experiment was performed to investigate the effects of different-sized particles of apple shoot biochar (60, 30, and 10 mesh) together with BOF on soil bacteria (using Illumina high-throughput sequencing) and the physicochemical properties of Mesembryanthemum cordifolium L. f. grown on saline–alkali land. Results indicated that the combined application of BOF and 10–60 mesh biochar reduced the volumetric weight of soil by 14%–29%, respectively, and additionally decreased soil electrical conductivity, increased the aerial biomass of the M. cordifolium L. f. by over 30%, and notably improved soil water–holding capacity, with 60 mesh giving the best results; organic carbon (OC), organic matter (OM), total nitrogen (N), available phosphorus, alkaline nitrogen, total potassium (K), and total phosphorus (P) were all significantly increased by the addition of combined biochar and BOF; thereinto, field capacity, N, P, K, OC, and OM were positively correlated with the bacterial community structure of coapplied biochar and BOF. There were no significant differences in the richness of total bacteria among the treatments; Proteobacteria, Actinobacteria, and Chloroflexi accounted for >70% of the total bacteria in each treatment; Norank_f__Geminicoccaceae and Micromonospora were the dominant genera across the treatments. The findings suggested that plant growth, physicochemical properties, and community diversity of rhizosphere bacteria in saline–alkali land were significantly positively influenced by biochar 60 mesh plus BOF, followed by biochar 10 and 30 mesh plus BOF. This conclusion could facilitate the study of the ecological functions of biochar and BOF, as well as their interactions with salt-tolerant plants on saline–alkali soil, which can be used to provide exploration ideas for saline–alkali land improvement.

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Section: Introductionmentioning

confidence: 99%

Effect of different biochar particle sizes together with bio-organic fertilizer on rhizosphere soil microecological environment on saline–alkali land

Zhang

Liang

et al. 2022

Front. Environ. Sci.

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“…Nevertheless, the value of 69 m 2 /g was quite low, most probably due to the high ash content of manure biochar, which can hinder the access of nitrogen to the pores. Previous investigations have reported [19,22,24,41,42] even lower surface areas of 2.4-17 m 2 /g at 500 • C and 8.3 m 2 /g at 700 • C. When manure biochar was further activated with steam at 700 • C, it is clearly shown that micropore volume and surface area were greatly enhanced 4.9-fold, reaching a value of 231.4 m 2 /g. At the higher temperature of 800 • C, microporosity increased, in addition to the size of the pores, which are characterized as mesopores.…”

Section: Structural Characteristics and Chemical Functional Groups Un...mentioning

confidence: 85%

Evaluation of Pig Manure for Environmental or Agricultural Applications through Gasification and Soil Leaching Experiments

Vamvuka

Raftogianni

2021

Applied Sciences

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The current study aimed at evaluating an untreated pig manure, firstly for its suitability for soil amendment in combination with an agricultural/bio-solid biochar, and secondly for its potential to be used for adsorption of hazardous species, replacing expensive activated carbons. Column soil leaching experiments were designed to simulate field conditions, and physical, chemical and mineralogical analyses were performed for raw materials and/or leachates. For activated carbon production, the manure was gasified by steam or carbon dioxide at high temperatures. Biochars were analyzed for organic and mineral matter, structural characteristics and organic functional groups. Activation by steam or carbon dioxide greatly enhanced specific surface area, reaching values of 231.4 and 233.3 m2/g, respectively. Application of manure to the soil promoted leaching of nitrates and phosphates and raised COD values of water extracts. Biochar addition retained these ions and reduced COD values up to 10 times at the end of the three-month period. The concentrations of heavy metals in the leachates were low and, in the presence of biochar in soil blends, they were significantly reduced by 50–70%. The manure presents a significant potential for adsorption of various pollutants or improvement of soil amendment if carefully managed.

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“…Leng et al (2019) showed that biochar with oxygen/ carbon of more than 0.2 or hydrogen/carbon of lower than 0.4 has mild sequestration potential, while those of oxygen/ carbon less than 0.2 or hydrogen/carbon org less than 0.4 present high carbon sequestration ability. Shen et al (2020) reported that the hydrogen/carbon ratio signifies the degree of carbonisation for the biochar organic aromaticity, where a hydrogen/carbon molar ratio lower than 0.3 poses extremely condensed aromatic ring structures, while a hydrogen/carbon molar ratio more than 0.7 indicates a non-condensed aromatic structure. For example, Lorenz and Lal (2018) stated that biochar could remain stable in soil for 1000 to 10,000 years, with an average of 5000 years, without any biodegradation.…”

Section: Role Of Biochar From Digestate In Climate Change Mitigationmentioning

confidence: 99%

Integration of biogas systems into a carbon zero and hydrogen economy: a review

et al. 2022

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The Ukraine conflict has put critical pressure on gas supplies and increased the price of fertilisers. As a consequence, biogas has gained remarkable attention as a local source of both gas for energy and biofertiliser for agriculture. Moreover, climate change-related damage incentivises all sectors to decarbonise and integrate sustainable practices. For instance, anaerobic digestion allows decarbonisation and optimal waste management. Incorporating a biogas system in each country would limit global warming to 2 °C. If suitable policies mechanisms are implemented, the biogas industry could reduce global greenhouse gas emissions by 3.29–4.36 gigatonnes carbon dioxide equivalent, which represent about 10–13% of global emissions. Here, we review the role of the biogas sector in capturing methane and mitigating carbon emissions associated with biogas outputs. Since biogas impurities can cause severe practical difficulties in biogas storing and gas grid delivering systems, we present upgrading technologies that remove or consume the carbon dioxide in raw biogas, to achieve a minimum of 95% methane content. We discuss the role of hydrogen-assisted biological biogas upgrading in carbon sequestration by converting carbon dioxide to biomethane via utilising hydrogen generated primarily through other renewable energy sources such as water electrolysis and photovoltaic solar facilities or wind turbines. This conceptual shift of 'power to gas' allows storing and utilising the excess of energy generated in grids. By converting carbon dioxide produced during anaerobic digestion into additional biomethane, biogas has the potential to meet 53% of the demand for fossil natural gas. We also evaluate the role of digestate from biogas systems in producing biochar, which can be used directly as a biofertiliser or indirectly as a biomethanation enhancement, upgrading, and cleaning material.

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Effect of pyrolysis temperature on characteristics, chemical speciation and environmental risk of Cr, Mn, Cu, and Zn in biochars derived from pig manure

Cited by 79 publications

References 50 publications

Effect of different biochar particle sizes together with bio-organic fertilizer on rhizosphere soil microecological environment on saline–alkali land

Effect of different biochar particle sizes together with bio-organic fertilizer on rhizosphere soil microecological environment on saline–alkali land

Evaluation of Pig Manure for Environmental or Agricultural Applications through Gasification and Soil Leaching Experiments

Integration of biogas systems into a carbon zero and hydrogen economy: a review

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