Dynamic characteristics of immobilized microorganisms for remediation of nitrogen-contaminated groundwater and high-throughput sequencing analysis of the microbial community

Li, Shuo; Yang, Mingxiang; Wang, Hao; Zhao, Yong

doi:10.1016/j.envpol.2020.114875

Cited by 14 publications

(5 citation statements)

References 28 publications

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“…The half-lives of the control group BTS and the experimental group BTS-MSFT4 show that the porous material BTS-MSFT4 possesses a rich pore structure, and the degradation of flora exists in its internal pores, which provides a suitable microenvironment for microorganisms to survive and avoids the influence of external adverse factors. Moreover, the nutrient elements of the material can be directly supplied to the degradation bacteria BTS for consumption, thus promoting the growth of the degradation bacteria BTS . At the same time, the immobilization method in this study exhibited a greater advantage on avoiding the weak binding force compared to the traditional adsorption method, by using PVA to firmly load the bacteria BTS on the pores of the material, and then, PVA was cross-linked with Ca 2+ to shape it, thus significantly improving the degradation efficiency of n -hexadecane.…”

Section: Resultsmentioning

confidence: 95%

“…Moreover, the nutrient elements of the material can be directly supplied to the degradation bacteria BTS for consumption, thus promoting the growth of the degradation bacteria BTS. 42 At the same time, the immobilization method in this study exhibited a greater advantage on avoiding the weak binding force compared to the traditional adsorption method, by using PVA to firmly load the bacteria BTS on the pores of the material, and then, PVA was cross-linked with Ca 2+ to shape it, thus significantly improving the degradation efficiency of nhexadecane. The selective adsorption modification of BTS-MSFT4@MTMS based on BTS-MSFT4, which can prolong the carbon chain on the surface of porous materials and reduce the interface tension, exhibits hydrophobic and lipophilic properties, while the half-life reduced to 14.05 h and the degradation rate of BTS-MSFT4 increased to 5%.…”

Section: Resultsmentioning

confidence: 99%

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Selective Adsorption and Efficient Degradation of Petroleum Hydrocarbons by a Hydrophobic/Lipophilic Biomass Porous Foam Loaded with Microbials

Chen

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Highly efficient elimination of petroleum pollution is of great importance for addressing environmental issues and social sustainability. In this study, we demonstrate a novel strategy for efficient elimination of petroleum pollution by selective adsorption of it by an ultralight hydrophobic/lipophilic microorganism-loaded biomass porous foam (BTS-MSFT4@MTMS) followed by a green degradation of adsorbates under mild conditions. The porous structure of biomass porous foam (MSFT) could provide plenty of room for immobilization of Bacillus thuringiensis (BTS), while a simple surface modification of the MSFT load with a BTS strain (BTS-MSFT4) by methyltrimethoxysilane (MTMS) could change its wettability from hydrophilic to lipophilic, which makes selective adsorption of hydophobic petroleum pollution from water for biodegradation possible. As expected, using a petroleum n-hexadecane solution with a concentration of 3% as a model oily wastewater, the as-prepared BTS-MSFT4@MTMS possesses both a superior selective adsorption of ca. 99% and high degradation activity with a high degradation rate of up to 86.65% within 8 days under the conditions of 37 °C, 120 r min −1 , and pH = 7, while the degradation rates for the BTS-MSFT4 and the free BTS strain were measured to be only 81.62 and 65.65%, respectively, under the same conditions. In addition, the results obtained from the study on environment tolerance show that the BTS-MSFT4@MTMS exhibits a strong tolerance under different conditions with various pHs, temperatures, and initial concentrations. Compared with the existing methods for removal of petroleum pollution by direct adsorption of petroleum pollution via superoleophilic porous materials or applying free microorganisms for biodegradation only, which suffers the drawbacks of low selectivity or poor efficiency, our method has great advantages of cost-effectiveness, scalable fabrication, and high efficiency without secondary pollution. Moreover, such a two-in-one strategy by integration of both selective adsorption and biodegradation into biodegradable BTS-MSFT4@MTMS may particularly have great potential for practical application in environmental remediation.

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Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Selective Adsorption and Efficient Degradation of Petroleum Hydrocarbons by a Hydrophobic/Lipophilic Biomass Porous Foam Loaded with Microbials

Chen

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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“…The obtained results indicate the efficiency of using the ASBR system as pretreatment and using the solubilized organics successively in denitrifying biocathode MFC for the simultaneous recovery of energy as well as nitrogen removal from groundwater. Similarly, the removal of NH 4 + -N, NO 2 − -N, and NO 3 − -N from groundwater was achieved through adsorption by the composite active medium of nitrogen-degrading bacteria immobilized consortia [132]. The ability of the composite active medium to remove nitrogen was found to be significantly enhanced by the immobilization of the degrading bacteria on scoria in comparison with the use of scoria alone.…”

Section: Treatment Of Groundwater By Biological Treatment Methodsmentioning

confidence: 96%

Removal of Toxic Elements and Microbial Contaminants from Groundwater Using Low-Cost Treatment Options

et al. 2021

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Purpose of Review This paper reviews various low-cost treatment techniques such as adsorption, permeable reactive barrier, and biological techniques for the simultaneous removal of chemical and microbial contaminants from groundwater and discusses treatment mechanisms of different treatment techniques. This paper also discusses the challenges of groundwater treatment, how to choose the appropriate treatment technique, and cost analysis of groundwater treatment. Recent Findings Various treatment technologies have been used for the treatment of groundwater: physical, chemical, and biological technologies with different success rates. In the literature, various adsorbents have been successfully synthesized from low-cost and environmentally friendly materials. Adsorption is considered an efficient treatment technique for the removal of both toxic elements and pathogens by utilizing different adsorbents. For example, the nanostructures of MgO with a BET surface area of up to 171 m2/g obtained a very high adsorption capacity of 29,131 mg/g for fluoride ions in water, while the incorporation of iron in activated carbon has improved its adsorption capacity to 51.3 mg/g for arsenic. Moreover, certain adsorbents have shown the capability to remove 99% of the rotavirus and adenovirus from groundwater. Summary Groundwater resources are contaminated with toxic metals and pathogens. Therefore, water treatment technologies should be evaluated for their efficiency to remove such contaminants. Determination of the most cost-effective and efficient treatment technique is not an easy task and requires the understanding of various aspects such as the contaminants present in water, the reuse options considered, and cost analysis of the treatment technique.

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“…High-throughput sequencing was widely used to study the impact of environmental factors on microbial communities due to a large amount of biological information resources acquired quickly and a low cost. Previous studies used high-throughput sequencing to analyze combined effects of green manure returning and addition of sewage sludge compost on plant growth and microorganism communities in golden tailings, effects of inoculation with lignocellulosedegrading microorganisms on nitrogen conversion and denitrifying bacterial community during aerobic composting and microbial community diversity of nitrogen-contaminated groundwater [1][2][3] .Therefore, highthroughput sequencing technology was the most reliable method for exploring the microbial community structural characteristics changed by various types of land use types with complex soil environments and heavy metal pollution near mining areas.…”

Section: Introductionmentioning

confidence: 99%

Study on the Rhizosphere Soil Microbial Community Structure Associated with Five Land Use Types in Jinchuan Mining Area

Gao

Zuo

et al. 2021

E3S Web Conf.

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Five different land use types (desert, farmland, mining park, slag heap and tailing dam) were selected as variables around the Jinchuan Cu-Ni mining area in Jinchang, Gansu Province in the present study. The Atriplex canescens (Pursh) Nutt.’s rhizosphere bacterial abundance, diversity and community composition were examined taking advantage of High-throughput sequencing technology to discuss the effect of soil physicochemical properties on soil microbial community structure. The result indicated that the phylum Proteobacteria and Firmicutes was the most dominant taxon in desert, farmland and mining park, with a high abundance more than 30%. The phylum Proteobacteria was the most dominant taxon in slag heap and tailing dam, with a high abundance more than 40%. The tailing dam had the highest bacterial Chao indexes and the farmland had the highest bacterial Observed species indexes, Shannon indexes and Simpson indexes. Observed species indexes and Shannon indexes between the five sites were significantly different. The redundancy analysis and principal component analysis showed that the main environmental factors caused the different of rhizosphere bacterial community structure in five land use types were Mg, Ca, Cu, TN and moisture, followed by Ni, Cr, K, Pb, Zn content and pH. Hence, the result indicates that land use and soil environmental factors had significant impact on the diversity of soil microbial community structure.

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Dynamic characteristics of immobilized microorganisms for remediation of nitrogen-contaminated groundwater and high-throughput sequencing analysis of the microbial community

Cited by 14 publications

References 28 publications

Selective Adsorption and Efficient Degradation of Petroleum Hydrocarbons by a Hydrophobic/Lipophilic Biomass Porous Foam Loaded with Microbials

Selective Adsorption and Efficient Degradation of Petroleum Hydrocarbons by a Hydrophobic/Lipophilic Biomass Porous Foam Loaded with Microbials

Removal of Toxic Elements and Microbial Contaminants from Groundwater Using Low-Cost Treatment Options

Study on the Rhizosphere Soil Microbial Community Structure Associated with Five Land Use Types in Jinchuan Mining Area

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