A further inquiry into co-pyrolysis of straws with manures for heavy metal immobilization in manure-derived biochars

Xu, Yonggang; Qi, Fang; Bai, Tianxia; Yan, Yubo; Wu, Chengyou; An, Zirun; Luo, Shijian; Huang, Zhong Hua; Xie, Peng

doi:10.1016/j.jhazmat.2019.120870

Cited by 69 publications

(16 citation statements)

References 41 publications

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“…The biochar yields under slow pyrolysis at 300 °C ranged from 39.2% to 80.9% (Table 1). A similar range of biochar yields from swine manure (73.8%) [21], cow manure (58.1-84.1%) [20,28,29], and poultry manure ( 71%) [30] was previously obtained when biochars were produced at a similar temperature (300 o C). The highest yield (80.9%) was found in grainfed cow manure biochar, and this could be attributed to the presence of some heterogeneous structure made of cellulose, lignin [31] as well as minerals such as Al2O3, Fe2O3, TiO2, calcite, quartz and fine dust particles in the feedstocks [31,32].…”

Section: Biochar Yieldsupporting

confidence: 61%

“…Furthermore, manure-and biosolid-derived biochars are rich in essential plant nutrients compared to other biomass-derived biochars [12], and thus have potential value as fertilizer. In recent years, a number of studies have concentrated on animal manure-derived biochars including chicken manure [12], poultry litter [13], cow manure [20], swine manure [21], and goat manure [22]. However, due to the extreme heterogeneity in the composition and physicochemical characteristics of various manures, and differences in preparation procedures, it is difficult to predict the corresponding biochar fertilizer values.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of the fertilizer potential of biochars produced from slow pyrolysis of biosolid and animal manures

Sarkar

Donne

Wade

et al. 2021

Journal of Analytical and Applied Pyrolysis

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Section: Biochar Yieldsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Assessment of the fertilizer potential of biochars produced from slow pyrolysis of biosolid and animal manures

Sarkar

Donne

Wade

et al. 2021

Journal of Analytical and Applied Pyrolysis

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“…Some surface biochar functional groups can also retain HMs by adsorption. For example, animal manure-based biochar and sawdust biochar can increase the immobilization of Cd through high surface complexation with O-containing groups [38].…”

Section: Surface Functional Groupsmentioning

confidence: 99%

Biochar and Its Broad Impacts in Soil Quality and Fertility, Nutrient Leaching and Crop Productivity: A Review

et al. 2021

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Biochar is gaining significant attention due to its potential for carbon (C) sequestration, improvement of soil health, fertility enhancement, and crop productivity and quality. In this review, we discuss the most common available techniques for biochar production, the main physiochemical properties of biochar, and its effects on soil health, including physical, chemical, and biological parameters of soil quality and fertility, nutrient leaching, salt stress, and crop productivity and quality. In addition, the impacts of biochar addition on salt-affected and heavy metal contaminated soils were also reviewed. An ample body of literature supports the idea that soil amended with biochar has a high potential to increase crop productivity due to the concomitant improvement in soil structure, high nutrient use efficiency (NUE), aeration, porosity, and water-holding capacity (WHC), among other soil amendments. However, the increases in crop productivity in biochar-amended soils are most frequently reported in the coarse-textured and sandy soils compared with the fine-textured and fertile soils. Biochar has a significant effect on soil microbial community composition and abundance. The negative impacts that salt-affected and heavy metal polluted soils have on plant growth and yield and on components of soil quality such as soil aggregation and stability can be ameliorated by the application of biochar. Moreover, most of the positive impacts of biochar application have been observed when biochar was applied with other organic and inorganic amendments and fertilizers. Biochar addition to the soil can decrease the nitrogen (N) leaching and volatilization as well as increase NUE. However, some potential negative effects of biochar on microbial biomass and activity have been reported. There is also evidence that biochar addition can sorb and retain pesticides for long periods of time, which may result in a high weed infestation and control cost.

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“…Figure 2 briefly introduced the advantages and disadvantages of biochar in the remediation of soil HM contamination. Firstly, it is reported that biochar may be the carrier of HMs [ 116 ], volatile organic compounds (VOCs) [ 117 ], dioxin (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs) [ 118 , 119 ] and other toxic substances, and the demands for remediation of HM contamination in soil varies from 1.5 to 72 t ha −1 or even higher [ 24 , 28 , 98 , 113 ]. Therefore, the toxic substances may be released into the soil/air/water environment with the application of the double-edged biochar, which will pose a secondary pollution and ecological risk.…”

Section: Potential Risksmentioning

confidence: 99%

Application Research of Biochar for the Remediation of Soil Heavy Metals Contamination: A Review

Cheng

Chen

Xu³

et al. 2020

Molecules

106

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Soil contamination by heavy metals threatens the quality of agricultural products and human health, so it is necessary to choose certain economic and effective remediation techniques to control the continuous deterioration of land quality. This paper is intended to present an overview on the application of biochar as an addition to the remediation of heavy-metal-contaminated soil, in terms of its preparation technologies and performance characteristics, remediation mechanisms and effects, and impacts on heavy metal bioavailability. Biochar is a carbon-neutral or carbon-negative product produced by the thermochemical transformation of plant- and animal-based biomass. Biochar shows numerous advantages in increasing soil pH value and organic carbon content, improving soil water-holding capacity, reducing the available fraction of heavy metals, increasing agricultural crop yield and inhibiting the uptake and accumulation of heavy metals. Different conditions, such as biomass type, pyrolysis temperature, heating rate and residence time are the pivotal factors governing the performance characteristics of biochar. Affected by the pH value and dissolved organic carbon and ash content of biochar, the interaction mechanisms between biochar and heavy metals mainly includes complexation, reduction, cation exchange, electrostatic attraction and precipitation. Finally, the potential risks of in-situ remediation strategy of biochar are expounded upon, which provides the directions for future research to ensure the safe production and sustainable utilization of biochar.

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A further inquiry into co-pyrolysis of straws with manures for heavy metal immobilization in manure-derived biochars

Cited by 69 publications

References 41 publications

Assessment of the fertilizer potential of biochars produced from slow pyrolysis of biosolid and animal manures

Assessment of the fertilizer potential of biochars produced from slow pyrolysis of biosolid and animal manures

Biochar and Its Broad Impacts in Soil Quality and Fertility, Nutrient Leaching and Crop Productivity: A Review

Application Research of Biochar for the Remediation of Soil Heavy Metals Contamination: A Review

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