Environmental risk assessment in livestock manure derived biochars

Wang, Andong; Zhang, Dongsheng; Zhang, Liqing; Zeng, Xinyi; Wang, Hua; Li, Longcheng; Fen, Liu; Ren, Bo; Xiao, Zhihua

doi:10.1039/c9ra08186k

Cited by 20 publications

(7 citation statements)

References 58 publications

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“…Similar results have been reported in other previous research 39 . Lower pyrolysis temperatures cannot attain the boiling point of HMs 43 . Since these HMs are less volatile, it is not possible to convert most of the F3 fraction to the F4 fraction 44 .…”

Section: Resultsmentioning

confidence: 99%

“… < 5 indicates Low Risk (LR), 5 < < 10 indicates Moderate Risk (MR), 10 < < 20 indicates Considerable Risk (CR), 20 < < 40 indicates High Risk (HR), and > 40 indicates Very High Risk (VHR). In this research, PERIs below 30 indicate Low Risk (LR), a PERI range from 30 to 60 indicates Moderate Risk (MR), a PERI range from 60 to 120 indicates Considerable Risk (CR), and PERIs greater than 120 indicates Very High Risk (VHR) 43 .…”

Section: Methodsmentioning

confidence: 97%

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Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

Wang

Zhang

Zeng

et al. 2021

Sci Rep

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This study was conducted to investigate the speciation, bioavailability and environmental risk of heavy metals (HMs) in chicken manure (CM) and water-washed swine manure (WSM) and their biochars produced at different pyrolysis temperatures (200 to 800 °C). As the pyrolysis temperature increased, the remaining proportion, toxicity characteristic leaching procedure (TCLP), HCl and diethylenetriamine pentaacetic acid (DTPA) of HMs gradually declined. This result proved that the speciation of HMs in chicken manure biochars (CMB) and water-washed swine manure biochars (WSMB) was influenced by pyrolysis temperature. The proportions of stable fractions were enhanced with increased pyrolysis temperature and weakened the HM validity for vegetation at 800 °C. Finally, the results of the risk assessment showed that the environmental risk of HMs in CMB and WSMB decreased with increasing pyrolysis temperature. Therefore, pyrolysis at 800 °C can provide a practical approach to lessen the initial and underlying heavy metal toxicity of CMB and WSMB to the environment.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 97%

Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

Wang

Zhang

Zeng

et al. 2021

Sci Rep

Self Cite

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“…GAI and PERI values take into account the sum of bound metals that can be assimilated to the F2 fraction in sequential analyses of metal content [Wang et al, 2019]. The carbonate fraction of metals containing metals precipitated with carbonates, sulphates, phosphates; tends to be stable [Mizerna and Król, 2018].…”

Section: Ecological Risk Assesmentmentioning

confidence: 99%

Content of Heavy Metals in Various Biochar and Assessment Environmental Risk

Kujawska¹

2023

J. Ecol. Eng.

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Biochar is a product of biomass pyrolysis and has a number of environmentally beneficial uses, but it can also pose risks if not managed properly. These risks are mainly due to the chemical structure of biochar, the content of heavy metals. The aim of this study was to evaluate the mobility and environmental risk of heavy metals in biochar produced from plant biomass (BB), municipal solid waste (MSW), compost (C) and coal refuse (CR). Pollution indices were calculated: geo-accumulation index (GAI), ecological risk (E r i ), the underlying ecological risk caused by the total pollution (PERI). The total heavy metal concentration is variable and depends on the type of biochar. The results indicate that there is a high risk of cadmium pollution in the environment. The underlying ecological risk caused by the total pollution values indicated that biochar from coal waste was the highest. The results obtained show the importance of mobility analysis in assessing the potential for natural use of biochar.

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“…The annual global output of rapeseed cake is about 40 million tons (Stein et al 2016). Concomitantly, the annual output of livestock and poultry manure in China is estimated to be 3.26 billion tons (Wang et al 2019). The rampant accumulation and ine cient treatment of agricultural wastes like rapeseed cake and sheep manure have caused serious environmental pollution problems in China.…”

Section: Introductionmentioning

confidence: 99%

Anaerobic digestion characteristics and key microorganisms associated with low-temperature rapeseed cake and sheep manure fermentation

Liu

Xiong

et al. 2022

Arch Microbiol

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Qinghai rural household biogas digesters were used to evaluate fermentation characteristics, including gas production and key microbial community changes, associated with low-temperature (15.2-17.8℃) mixed rapeseed cake and sheep manure anaerobic fermentations across 40 days using seven different ratios of material. Different raw material ratios resulted in signi cantly different effects on biogas yields and microbial community compositions. When the ratio of sheep manure to rapeseed cake was 1:2, the highest level of cumulative gas production was observed (122.92 m 3 •t −1 ). Firmicutes, Proteobacteria, Bacteroidetes, and Actinobacteria were the dominant bacterial phyla among the 29 digester samples (total relative abundances > 79.23%), followed by Synergistetes (4.09%-10.7%). Lactobacillus was the most abundant genus in the biogas digesters with high rapeseed cake contents (average relative abundances: 14.68%), while Peptoniphilus exhibited higher abundances (12.69%) in the mixed fermentation digester treatments. In addition, unclassi ed Synergistaceae abundances (6.64%) were positively associated with biogas production variation among treatments. Bacteroides (5.74%) and Pseudomonas (5.24%) both accounted for larger proportions of communities in the digesters that used more sheep manure. Methanomicrobiales (66.55%) was the most dominant archaeal group among digesters, with Methanogenium (41.82%) and Methanoculleus (16.55%) representing the main gas-producing archaeal genera; they were more abundant in biogas digesters with higher sheep manure contents and higher rapeseed cake contents, respectively. Regardless of the raw material ratios, Methanoculleus exhibited the highest abundances on the 4th day of fermentation. VFAs and pH were the main factors associated with differences in microbial communities among the 29 samples. Speci cally, VFA concentrations were positively correlated with Lactobacillus and Methanoculleus abundances, while pH was positively correlated with Bacteroides, Pseudomonas, Methanobrevibacter, and Methanobacterium abundances.

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Environmental risk assessment in livestock manure derived biochars

Abstract: Livestock-manure-derived biochar is one of major products obtained from the pyrolysis of livestock manure. This study quantitatively assesses the pollution level and ecological risks associated with heavy metals in livestock manure and the biochar produced by its pyrolysis.

Cited by 20 publications

References 58 publications

Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

Speciation and environmental risk of heavy metals in biochars produced by pyrolysis of chicken manure and water-washed swine manure

Content of Heavy Metals in Various Biochar and Assessment Environmental Risk

Anaerobic digestion characteristics and key microorganisms associated with low-temperature rapeseed cake and sheep manure fermentation

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