Ureolytic bacteria from electronic waste area, their biological robustness against potentially toxic elements and underlying mechanisms

Li, Weila; Fishman, Ayelet; Achal, Varenyam

doi:10.1016/j.jenvman.2021.112517

Cited by 33 publications

(7 citation statements)

References 24 publications

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“…During biocalcification, the surface-layer protein (Slp) of ureolytic bacteria, repeated protein monomers that self-assembled into ordered structures, also plays an essential role in the HM immobilization mechanism. Li et al (2021b) reported a positive correlation between metal concentrations and the Slp. This biological compounds not only can execute biosorption, but also can improve survivability of bacteria in harsh HM-contaminated environments ( Suhr et al, 2014 ; Li et al, 2021b ).…”

Section: Strategies For Enhancing the Performance Of Ureolytic Bacter...mentioning

confidence: 95%

“…In general, the released free HMs may inhibit bacterial growth and urease activity by binding to the sulfhydryl groups of urease ( Krajewska, 2008 ), thereby diminishing the efficacy of the treatment of targeted HMs ( Chung et al, 2020 ; Chen et al, 2021b ; Li et al, 2021b ). The metal tolerance of a specific strain is a crucial parameter for an efficient ureolytic MICP process, which varies depending on the heavy metal species.…”

Section: Key Factors Influencing the Performance Of Micp Bioremediationmentioning

confidence: 99%

“…Among these metabolic pathways, carbonate production mediated by ureolysis has been found to be the most energy-efficient, simple, widespread, and calcification-prone, as well as the easiest to control ( Wang et al, 2016 ; Seifan and Berenjian, 2019 ; Liu et al, 2021 ). Numerous studies have examined the bioremediation potential of microbes at HM-contaminated sites by inducing carbonate precipitation and transforming free toxic ions into inactive forms in stable and long-lasting matrices ( Achal et al, 2011 ; Fang et al, 2021 ; Yin et al, 2021a ; Li et al, 2021b ). Therefore, it is widely accepted that MICP is an environmentally friendly method for accelerating HM removal rates by optimizing limiting factors ( Wang et al, 2021 ; Li et al, 2022 ).…”

Section: Introductionmentioning

confidence: 99%

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Heavy metal bioremediation using microbially induced carbonate precipitation: Key factors and enhancement strategies

Zhang

Zhang²,

Xu³

et al. 2023

Front. Microbiol.

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With the development of economy, heavy metal (HM) contamination has become an issue of global concern, seriously threating animal and human health. Looking for appropriate methods that decrease their bioavailability in the environment is crucial. Microbially induced carbonate precipitation (MICP) has been proposed as a promising bioremediation method to immobilize contaminating metals in a sustainable, eco-friendly, and energy saving manner. However, its performance is always affected by many factors in practical application, both intrinsic and external. This paper mainly introduced ureolytic bacteria-induced carbonate precipitation and its implements in HM bioremediation. The mechanism of HM immobilization and in-situ application strategies (that is, biostimulation and bioaugmentation) of MICP are briefly discussed. The bacterial strains, culture media, as well as HMs characteristics, pH and temperature, etc. are all critical factors that control the success of MICP in HM bioremediation. The survivability and tolerance of ureolytic bacteria under harsh conditions, especially in HM contaminated areas, have been a bottleneck for an effective application of MICP in bioremediation. The effective strategies for enhancing tolerance of bacteria to HMs and improving the MICP performance were categorized to provide an in-depth overview of various biotechnological approaches. Finally, the technical barriers and future outlook are discussed. This review may provide insights into controlling MICP treatment technique for further field applications, in order to enable better control and performance in the complex and ever-changing environmental systems.

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Section: Strategies For Enhancing the Performance Of Ureolytic Bacter...mentioning

confidence: 95%

Section: Key Factors Influencing the Performance Of Micp Bioremediationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Heavy metal bioremediation using microbially induced carbonate precipitation: Key factors and enhancement strategies

Zhang

Zhang²,

Xu³

et al. 2023

Front. Microbiol.

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“…The MICP technology can precipitate carbonates between soil particles and has been widely applied to calcareous sand reinforcement Lai et al, 2020;Rahman et al, 2020;Zhang et al, 2020;Cui et al, 2021;Xiao et al, 2021;Yang et al, 2022), while studies on the remediation of heavy metals using the MICP technology are markedly limited (Kang et al, 2015;Li et al, 2021;Wang et al, 2022e,f). The principle of the MICP technology is to catalyze urea hydrolysis through secreting the urease using the ureolytic bacteria, discharging hydroxide and ammonium ions (see Eqs.…”

Section: Introductionmentioning

confidence: 99%

Catalyzing urea hydrolysis using two-step microbial-induced carbonate precipitation for copper immobilization: Perspective of pH regulation

et al. 2022

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Microbial induced carbonate precipitation (MICP) has recently applied to immobilize heavy metals toward preventing their threats to public health and sustainable development of surrounding environments. However, for copper metallurgy activities higher copper ion concentrations cause the ureolytic bacteria to lose their activity, leading to some difficulty in forming carbonate precipitation for copper immobilization (referred to also as “biomineralization”). A series test tube experiments were conducted in the present work to investigate the effects of bacterial inoculation and pH conditions on the copper immobilization efficiency. The numerical simulations mainly aimed to compare with the experimental results to verify its applicability. The copper immobilization efficiency was attained through azurite precipitation under pH in a 4–6 range, while due to Cu2+ migration and diffusion, it reduced to zero under pH below 4. In case pH fell within a 7–9 range, the immobilization efficiency was attained via malachite precipitation. The copper-ammonia complexes formation reduced the immobilization efficiency to zero. The reductions were attributed either to the low degree of urea hydrolysis or to inappropriate pH conditions. The findings shed light on the necessity of securing the urease activity and modifying pH conditions using the two-step biomineralization approach while applying the MICP technology to remedy copper-rich water bodies.

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“…By this process, ureolytic bacteria such as Bacillus megaterium, Lysinibacillus sp. and Sporosarcina pasteurii can be used to carry out the carbonate precipitation required for brick production (Li and Fishman 2021).…”

Section: Introductionmentioning

confidence: 99%

Sustainable bio‐bricks prepared with synthetic urine enabled by biomineralization reactions

Fang

Achal

2021

Lett Appl Microbiol

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Significance and Impact of the Study: Ureolytic bacterium, Lysinibacillus fusiformis was grown in urine followed by utilizing it in production of bricks. The produced bio-bricks had significant compressive strength that was more than 59% compared to control ones with lower porosity. The research revealed the process of microbially induced mineral precipitation (MIMP) towards sustainable bricks production with urine. The process of MIMP has better advantage over microbially induced calcite precipitation and, as an impact of this research, could be widely used for future research related to biocementation. The idea is that real urine can be used, but artificial urine was used here for reasons of standardization.

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Ureolytic bacteria from electronic waste area, their biological robustness against potentially toxic elements and underlying mechanisms

Cited by 33 publications

References 24 publications

Heavy metal bioremediation using microbially induced carbonate precipitation: Key factors and enhancement strategies

Heavy metal bioremediation using microbially induced carbonate precipitation: Key factors and enhancement strategies

Catalyzing urea hydrolysis using two-step microbial-induced carbonate precipitation for copper immobilization: Perspective of pH regulation

Sustainable bio‐bricks prepared with synthetic urine enabled by biomineralization reactions

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