Zero-valent iron drives the passivation of Zn and Cu during composting: Fate of heavy metal resistant bacteria and genes

Li, Kecheng; Fu, Mengxin; Ma, Liangcai; Yang, Hongxiang; Li, Qunliang

doi:10.1016/j.cej.2022.139136

Cited by 16 publications

(7 citation statements)

References 55 publications

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“…The higher relative abundance of Proteobacteria, Firmicutes, and Actinobacteria are thought to play a significant role in organic matter degradation (particularly carbohydrates and amino acids) (Guo et al 2022). Proteobacteria is the main phylum involving metal-resistant bacteria during composting (Li et al 2023). In this study, Proteobacteria, Firmicutes, and Actinobacteria abundances disclosed a significant change trend as the composting proceeded.…”

Section: Impact Of Biochar On the Succession Of Microbial Community T...mentioning

confidence: 51%

“…4), while during the thermophilic phase, K17319, K02552, K01679, and K00260 abundances increased to 9.7%, 6.9%, 6.7%, and 5.1%, respectively, on the 3rd day, nevertheless, within composing late stage on the 32nd day their abundances reduced to 5.7%, 3.4%, 3.2%, and 3.7%, respectively. The peak abundance revealed by ABC transporters within composting stages may facilitate Zn and Cu-related gene functions, as some of them encode the periplasmic binding protein-dependent ABC transport system (Li et al 2023). On the other hand, the higher abundance of siderophore group nonribosomal peptides biosynthesis (involving uptake and efflux systems) within the composting process denotes the core regulation of Zn and Cu uptake and conversion (Li et al 2023).…”

Section: Kegg Level Variations Under Biochar Addition Throughout Comp...mentioning

confidence: 99%

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Mikania micrantha Kunth and its derived biochar impacts on heavy metal bioavailability and siderophore-related genes during chicken manure composting

Abdellah,

Chen,

Deng

et al. 2024

Biochar

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Biochar can potentially reduce heavy metals (HMs) mobility and bioavailability during composting. However, siderophores secreted by functional microbes might lead to the re-mobilization of metals like Cu and Zn. Therefore, this study intended to explore the impacts of Mikania micrantha Kunth (MM) and MM-derived biochar (MMB) in the reduction of Cu and Zn bioavailability, and siderophore-related gene abundances during composting. Compared with MM and corn straw (CS) composts, a significant decline was noticed in the extractable and reducible Cu [(2.3 mg kg−1 + 12.1 mg kg−1), and (3.3 mg kg−1 + 14.6 mg kg−1)], and Zn [(103.1 mg kg−1 + 110.1 mg kg−1), and (109.6 mg kg−1 + 117.2 mg kg−1)] in MMB and corn straw biochar (CSB) composts, respectively. Besides, the lowest relative abundance of HMs-resistant bacteria particularly Corynebacterium (0.40%), Pseudomonas (0.46%), and Enterobacter (0.47%), was noted in MMB compost. Also, a significant increase in sesquiterpenoid and triterpenoid biosynthesis abundance (5.77%) accompanied by a reduction in the abundance of clusters related to siderophore transport, and siderophore transmembrane transporter activity was detected in MMB compost. Multivariate analysis labeled temperature, moisture content, total organic carbon, Corynebacterium, and Bacillus as the primary factors significantly correlated with the Cu and Zn bioavailability (− 0.90 ≤ r ≤ 0.90, P < 0.05). The structural equation model revealed that physicochemical parameters, microbial abundance, and siderophores exert a substantial influence on Cu and Zn bioavailability. Accordingly, MM and its derived biochar are recommended as an effective approach for accelerating Cu and Zn bioavailability reduction and managing the growth and distribution of invasive plants. Graphical Abstract

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Section: Impact Of Biochar On the Succession Of Microbial Community T...mentioning

confidence: 51%

Section: Kegg Level Variations Under Biochar Addition Throughout Comp...mentioning

confidence: 99%

Mikania micrantha Kunth and its derived biochar impacts on heavy metal bioavailability and siderophore-related genes during chicken manure composting

Abdellah,

Chen,

Deng

et al. 2024

Biochar

View full text Add to dashboard Cite

show abstract

“…Cellulose and hemicellulose consist of various types of polysaccharides, while lignin is an aromatic polymer with a three-dimensional network structure. These components are tightly intertwined and exhibit high resistance to degradation [ 27 ]. Composting enables microorganisms to degrade lignocellulose and convert it into humus, thus transforming organic solid waste into organic fertilizer and soil conditioner [ 28 ].…”

Section: Resultsmentioning

confidence: 99%

Optimizing Straw-Rotting Cultivation for Sustainable Edible Mushroom Production: Composting Spent Mushroom Substrate with Straw Additions

Ma,

Liu,

Zhou

et al. 2023

JoF

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In recent years, the optimization of straw-rotting formulations for cultivating edible mushrooms and the management of the resulting spent mushroom substrate have emerged as new challenges. This study aimed to investigate the composting of spent mushroom substrate produced from mushroom cultivation with various straw additions, under conditions where chicken manure was also used. Parameters measured during the composting process included temperature, pH, electrical conductivity (EC), germination index (GI), moisture, and total nitrogen content. Additionally, changes in nutrient content within the compost piles before and after composting were determined, and the variations in bacterial and fungal communities across different treatments before and after composting were analyzed using 16S rRNA and ITS sequencing. The results indicated that the spent mushroom substrate produced by adding 20% straw during mushroom cultivation was more suitable for composting treatment. The findings suggest that incorporating an appropriate amount of straw in mushroom cultivation can facilitate subsequent composting of spent mushroom substrate, providing an effective strategy for both environmental protection and cost reduction.

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“…The concentrations of exchangeable (EXC) fraction, reducible (RED) fraction, oxidizable (OXI) fraction and residual (RES) fraction of heavy metals were extracted by an improved BCR sequential extraction procedure (Li et al, 2023;Niu et al, 2022). Brie y, EXC fraction was extracted by 0.1 mol/L acetic acid, followed by the supernatant was used for EXC fraction analysis, and the solid residue was used for RED fraction analysis.…”

Section: Heavy Metal Analysismentioning

confidence: 99%

“…Heavy metal pollution is an important factor limiting the land use of livestock manure composting products, and how to reduce the toxicity of heavy metals is the focus of resource recycling and sustainable development (Chen et al, 2020;Li et al, 2023). The heavy metals in compost mainly come from livestock and poultry manure in intensive farming, and micronutrients (Zn and Cu) are widely added to animal feed (Rensing et al, 2018;Liu et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Heavy metal tolerance and detoxification mechanism mediated by heavy metal resistance genes in compost habitat

Qin,

2024

Preprint

Self Cite

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Heavy metal pollution from compost is one of the most concerned environmental problems, which poses a threat to the ecosystem and human health. This study aims to reveal the heavy metal tolerance and detoxification mechanism mediated by heavy metal resistance genes (HMRGs) in compost habitat through metagenomics combined with chemical speciation analysis of heavy metals. The results showed that there were 37 HMRGs corresponding to 7 common heavy metal(loid)s in composting, and they had the ability to transform heavy metals into stable or low-toxic speciation by regulating enzyme transport, redox and methylation, etc. This study summarized the heavy metal metabolism pathway mediated by HMRGs, providing a new perspective for understanding the transformation of heavy metals in the composting process.

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Zero-valent iron drives the passivation of Zn and Cu during composting: Fate of heavy metal resistant bacteria and genes

Cited by 16 publications

References 55 publications

Mikania micrantha Kunth and its derived biochar impacts on heavy metal bioavailability and siderophore-related genes during chicken manure composting

Mikania micrantha Kunth and its derived biochar impacts on heavy metal bioavailability and siderophore-related genes during chicken manure composting

Optimizing Straw-Rotting Cultivation for Sustainable Edible Mushroom Production: Composting Spent Mushroom Substrate with Straw Additions

Heavy metal tolerance and detoxification mechanism mediated by heavy metal resistance genes in compost habitat

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