Effects of aging and weathering on immobilization of trace metals/metalloids in soils amended with biochar

Zhong, Yuchi; Igalavithana, Avanthi Deshani; Zhang, Ming; Li, Xiaodian; Rinklebe, Jörg; Hou, Deyi; Tack, Filip; Alessi, Daniel S.; Tsang, Daniel C.W.; Ok, Yong Sik

doi:10.1039/d0em00057d

Cited by 33 publications

(10 citation statements)

References 164 publications

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“…The composting thermophilic biological degradation process can inactivate helminth eggs to the World Health Organisation’s recommended levels for safe agricultural use 34 , 35 . Considerable studies have demonstrated the benefits of co-compost application on land in terms of improved soil water-holding capacity, nutrient retention, and soil structure 36 – 39 . Compost application complements and supplements the use of chemicals fertilizers by augmenting their agronomic efficiency 4 , 10 , 40 .…”

Section: Introductionmentioning

confidence: 99%

Behavioral intentions of rural farmers to recycle human excreta in agriculture

Gwara

Wale

Odindo

2022

Sci Rep

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Considerable progress has been made in developing human excreta recovery pathways and processes for maximum nutrient recovery and contaminant elimination. The demand segment has often been ignored as an area for future research, especially during the technology development. The findings from the few published articles on social acceptance show missing and inconclusive influence of demographic, sociological, and economic farmer-characteristics. This study endeavours to close this gap by using the social psychological theories, technology adoption theories and the new ecological paradigm to investigate the factors that influence the behavioral intentions of rural farmers to recycle human excreta in agriculture. Study findings show that social acceptance was driven by awareness, religiosity, income, source of income, and environmental dispositions. Perceived behavioral control represents a potential barrier to human excreta reuse. The study recommends the demographic, cultural, sociological, and economic mainstreaming of dissemination strategies of circular bioeconomy approaches within the context of agricultural innovation systems.

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Section: Introductionmentioning

confidence: 99%

Behavioral intentions of rural farmers to recycle human excreta in agriculture

Gwara

Wale

Odindo

2022

Sci Rep

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“…The contrasting properties between macro- and nano-scale materials have resulted in proposals for separate regulatory frameworks (Kookana et al 2014 ). There are recent investigations into aging and weathering effects on bulk biochar applications (Zhong et al 2020 ), but there is a need for increased focus on the long-term effects of PBNPs and their lifecycle following release from bulk applications. These should include real-world sampling for PBNPs downstream from previous bulk applications as well as testing of aquatic organisms.…”

Section: Discussion and Future Research Directionsmentioning

confidence: 99%

“…Although there is no direct comparison of reactivities between PBNPs purposefully produced (e.g., ball-milled) and those leached after bulk material application and derived through natural processes, it is safe to assume that mechanical breakage is comparable to abrasion and other physical stresses imposed in the environment. Recently, Zhong et al ( 2020 ) investigated the weathering and aging effects on bulk biochar structure and surface chemistry used in soil amendment, which may additionally include degradation induced by microbial communities. To our knowledge, there has been no review of the impacts of PBNPs produced and released in the environment from biochar and activated carbon used in remediation, soil amendment, and wastewater treatment applications.…”

Section: Introductionmentioning

confidence: 99%

Pyrolyzed biomass-derived nanoparticles: a review of surface chemistry, contaminant mobility, and future research avenues to fill the gaps

Swaren

Safari

Konhauser

et al. 2022

Biochar

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Nanoparticles are abundant in the subsurface, soil, streams, and water bodies, and are often a critical control on elemental speciation, transport and cycling in the natural environment. This review provides an overview of pyrolyzed biomass-derived nanoparticles (PBNPs), their surface properties and reactivity towards aqueous species. We focus specifically on biochar-derived nanoparticles and activated carbon-derived nanoparticles which fall under our classification of PBNPs. Activated carbon-iron (nano)composites are included in some instances where there are significant gaps in literature because of their environmental relevance. Increased use of activated carbon, along with a resurgence in the manufacture and application of biochar for water treatment and soil amendment, has generated significant concerns about the mobility and toxicity of PBNPs derived from the bulk material in environmental applications. Recent examples are discussed to highlight current progress in understanding the influence of PBNPs on contaminant transport, followed by a critical discussion of gaps and future research directions. Graphical Abstract

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“…12 There was evidence of cracking and fracturing of the biochar surface with alternate wetting and drying. 13 However, so far the influences of soil compositions on biochar stability was not taken seriously or researched quantitatively. Because it was difficult to apply a single conceptual model or a precise numerical model to complex soil system.…”

Section: Introductionmentioning

confidence: 99%

“…Water rinsing likely removed the fine biochar particles that were loosely attached to the biochar particle surface 12 . There was evidence of cracking and fracturing of the biochar surface with alternate wetting and drying 13 . However, so far the influences of soil compositions on biochar stability was not taken seriously or researched quantitatively.…”

Section: Introductionmentioning

confidence: 99%

Stability of biochar in five soils: Effects from soil property

Yang

Zuo

Zhou

et al. 2021

Environ Prog Sustainable Energy

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The stability of biochar in soil was an important property influencing biochar environmental effects, most studies attributed biochar stability to its intrinsic molecular structure, but few realized that biochar stability mainly depended on soil environmental factors. In this study, biochar was applied into five soils with distinct properties, and CO2 release was detected during a 28‐days incubation, double‐exponential model was used to fit CO2 cumulative release. Correlation analysis between basic properties of five soils and parameters of double‐exponential model was conducted to screen out crucial soil factors affecting biochar stability. Argi‐Udic Ferrosols soil, showing best performance among five soils on protecting biochar stability, was selected to simulate paddy‐upland rotation, exploring the influence of abrupt increase of soil moisture on biochar stability. Results showed that CO2 release from biochar had negative correlation with clay and Fe content of soil (correlation coefficient was −0.68 ~ −0.61 and −0.60 ~ −0.26), whereas had positive correlation with pH and Ca content of soil (correlation coefficient was 0.29 ~ 0.69 and 0.74 ~ 0.91). Abrupt increase of moisture resulted in labile‐C loss from biochar increased by 1.4 times. It implied that biochar stability was an ecological property, and acid soil, rich in clay and Fe contents and less in Ca content, was more favorable to maintain biochar stability. Results in this study were helpful to understand environmental chemistry behavior of biochar and better perform its soil environmental effects.

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Effects of aging and weathering on immobilization of trace metals/metalloids in soils amended with biochar

Abstract: Biochar is an effective amendment for trace metals/metalloids (TMs) immobilization in soils. The capacity of biochar to immobilize TMs in soil can be positively or negatively altered due to the...

Cited by 33 publications

References 164 publications

Behavioral intentions of rural farmers to recycle human excreta in agriculture

Behavioral intentions of rural farmers to recycle human excreta in agriculture

Pyrolyzed biomass-derived nanoparticles: a review of surface chemistry, contaminant mobility, and future research avenues to fill the gaps

Stability of biochar in five soils: Effects from soil property

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