Roles of different humin and heavy-metal resistant bacteria from composting on heavy metal removal

Wei, Yuquan; Zhao, Yue; Zhao, Xinyu; Wei, Zimin; Zheng, Yansi; Zuo, Huiduan

doi:10.1016/j.biortech.2019.122375

Cited by 134 publications

(23 citation statements)

References 47 publications

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“…With the progress of composting, the increase of TP concentration may improve the possibility of Cd to form cadmium phosphate precipitation, or co-precipitate with other phosphates 13,21 , thus reducing the mobility and bioavailability of Cd. Another explanation of this result could be the biosorption function played by the microorganisms 22 . Biosorption can adsorb heavy metal ions on the surface of microorganisms as well as provide nucleation sites for the formation of stable heavy metal minerals, thus immobilize heavy metals 23 .…”

Section: Redundancy Analysis Of Physicochemical Parameters and Speciamentioning

confidence: 92%

“…Biosorption can adsorb heavy metal ions on the surface of microorganisms as well as provide nucleation sites for the formation of stable heavy metal minerals, thus immobilize heavy metals 23 . Studies have shown that microbial biomass, species and diversity can significantly affect the biosorption of heavy metal ions 22,24 . Furthermore, P and N can regulate microbial metabolism and thus affecting microbial community and biomass 3,25 .…”

Section: Redundancy Analysis Of Physicochemical Parameters and Speciamentioning

confidence: 99%

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Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting

Guo

Wang

Liu

2020

Sci Rep

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This study aims to investigate the relationship between key physicochemical parameters related to composting process and bioavailability of Cd, As and Cr during swine manure composting through regulating different initial carbon to nitrogen (C/N) ratios (15:1, 20:1, 25:1) and bulking agent types (straw, green waste). Results showed that higher initial C/N ratio of 20:1 or 25:1 and straw as bulking agent were optimal to reduce the bioavailability of Cd, As and Cr (62.4%, 20.6% and 32.2% reduction, respectively). Redundancy analysis implied that the bioavailability of Cd was significantly associated with total phosphorus and total nitrogen, deducing the formation of phosphate precipitation and biosorption might participated in the reaction process, while that of As and Cr were mainly influenced by organic matter (OM), cation exchange capacity (CEC) and OM, CEC, electric conductivity, respectively. A total of 48.5%, 64.6% and 62.2% of Cd, As and Cr redistribution information could be explained by the above parameters. Further correlation analysis revealed that bioavailable As and Cr were negatively correlated with humic acid to fulvic acid ratio. In summary, this study confirms that the mechanisms of phosphate precipitation, biosorption and humification played critical role in reducing Cd, As and Cr bioavailability during swine manure composting.

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Section: Redundancy Analysis Of Physicochemical Parameters and Speciamentioning

confidence: 92%

Section: Redundancy Analysis Of Physicochemical Parameters and Speciamentioning

confidence: 99%

Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting

Guo

Wang

Liu

2020

Sci Rep

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“…During the preparation process, D310-1 and D310-5 were cultivated and collected, and then the concentration of the bacteria was adjusted with a phosphate buffer to OD 600nm = 2.0 ± 0.1. Finally, they were inoculated into the fermentation medium with 2% inoculum, respectively [20]. Detailed information related to the preparation of the co-culture bacteria and the P. eryngiu-SMS-CB are provided in the supplementary material.…”

Section: Degradation Of Chlorimuron-ethyl By Sterilized P Eryngiu-smmentioning

confidence: 99%

“…Sterile water was added to the soil of each groups every 2 days to maintain the moisture content. Soil samples were taken at specific time intervals (10,20,30,40,50, 60, 70 and 80 d) for chlorimuron-ethyl residue quantification. A high-throughput sequencing method (MiSeq platform) was used by Sangon Biotech Co., Ltd. (Shanghai, China) to examine the bacterial relative abundance and diversity in the samples at 80 days and 180 days [22,23].…”

Section: Remediation Of Chlorimuron-ethyl-contaminated Soilmentioning

confidence: 99%

Bioremediation of Historically Chlorimuron-Ethyl-Contaminated Soil by Co-Culture Chlorimuron-Ethyl-Degrading Bacteria Combined with the Spent Mushroom Substrate

et al. 2020

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In this study, a novel chlorimuron-ethyl-degrading Pleurotus eryngiu-SMS-CB was successfully constructed for remediation of soil historically contaminated with chlorimuron-ethyl. The P. eryngiu-SMS-CB was prepared using efficient chlorimuron-ethyl-degrading cocultured bacteria, Rhodococcus sp. D310-1 and Enterobacter sp. D310-5, with spent mushroom substrate (SMS, a type of agricultural waste containing laccase) of Pleurotus eryngiu as a carrier. The chlorimuron-ethyl degradation efficiency in historically chlorimuron-ethyl-contaminated soil reached 93.1% at the end of 80 days of treatment with the P. eryngiu-SMS-CB. Although the P. eryngiu-SMS-CB altered the microbial community structure at the beginning of the 80 days, the bacterial population slowly recovered after 180 days; thus, the P. eryngiu-SMS-CB does not have an excessive effect on the long-term microbial community structure of the soil. Pot experiments indicated that contaminated soil remediation with P. eryngiu-SMS-CB reduced the toxic effects of chlorimuron-ethyl on wheat. This paper is the first to attempt to use chlorimuron-ethyl-degrading bacterial strains adhering to P. eryngiu-SMS to remediate historically chlorimuron-ethyl-contaminated soil, and the microbial community structure and P. eryngiu-SMS-CB activity in chlorimuron-ethyl-contaminated soil were traced in situ to evaluate the long-term effects of this remediation.

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“…The rapid technological development and urbanization coupled with population growth is posing signi cant impacts on the environment, ecosystems and human society worldwide. As a result, the farmland pollution is concerned as one of the most severe global issues that has prompted all countries in the world to pay more attention on the remediation of agricultural lands for the sustainable development of economy (Wei et al, 2020;Xie et al, 2019;Zhang et al, 2020) Cadmium is a widely dispersed metal element that may be released to the environment with accelerated anthropogenic activities. Cadmium is active in the migration between the soil-plant rhizosphere and is toxic to animals, plants and humans (Martelli et al, 2006b;Wang et al, 2020a).…”

Section: Introductionmentioning

confidence: 99%

Biological Cadmium Detoxification in Rice Using the Fungus Trametes Pubescens: A Promising and Feasible Approach

Liu¹,

Wang²,

Lin³

et al. 2020

Preprint

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Background: Cadmium is a widely dispersed metal element that may be released to the environment with accelerated anthropogenic activities. Rice with high cadmium content is a serious threat to food safety and human health. Results: A heavy metal-resistant white rot fungus Trametes pubescens MB 89 with remarkable ability to prevent rice from cadmium toxification has been investigated in this study. We have assessed the biosorption of this ectomycorrhizal fungus with high concentrations of Cd2+. Results indicate that the maximum removal rate of Cd2+ from aqueous solution (10 mg/L) by T. pubescens MB 89 was 53.13%. A biofilm was formed on the cell surface of mycelium with Cd (II) been reduced to Cd (0) in the form of nanoscale particles in aqueous solution. It was found that the functional groups of –OH, –NH, C-H, C=O, C-O, S=O on the surface of T. pubescens MB 89 participated in the Cd2+ detoxification process. The effect of rice plant colonization with T. pubescens MB 89 was investigated with the pot experiments showing that it could significantly promoted rice seedlings growth and reduced cadmium accumulation on rice tissues. Moreover, the fungal colonization could decrease the cadmium transport to the rice roots, ameliorate cadmium toxicity and ensure the normal absorption and transportation of nutrients by the roots. Conclusion: This study showed a promising potential for T. pubescens MB 89 to prevent cadmium toxification for the rice grains in paddy fields. To further investigate the mechanism of T. pubescens to protect and promote rice growth, our next research focus will be on the beneficial interactions of ectomycorrhizal fungi and the rice root system with the aid of the root-fungal interactome analysis.

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Roles of different humin and heavy-metal resistant bacteria from composting on heavy metal removal

Cited by 134 publications

References 47 publications

Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting

Potential mechanisms involving the immobilization of Cd, As and Cr during swine manure composting

Bioremediation of Historically Chlorimuron-Ethyl-Contaminated Soil by Co-Culture Chlorimuron-Ethyl-Degrading Bacteria Combined with the Spent Mushroom Substrate

Biological Cadmium Detoxification in Rice Using the Fungus Trametes Pubescens: A Promising and Feasible Approach

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