Zinc-Containing Effluent Treatment Using Shewanella xiamenensis Biofilm Formed on Zeolite

Zinicovscaia, Inga; Yushin, Nikita; Grozdov, Dmitrii; Abdusamadzoda, Daler; Safonov, Alexey; Rodlovskaya, E. N.

doi:10.3390/ma14071760

Cited by 14 publications

(9 citation statements)

References 36 publications

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“…Often, the parameters (pH, metal concentration) of real wastewater are different from batch systems; in this case, the efficiency of metal ions removal can be increased in several ways: by effluent dilution or application of a two-or-more-step scheme of metal removal with the addition of a new dosage of biosorbent, as it was shown in our previous studies [27,28].…”

Section: Bioaccummulationmentioning

confidence: 99%

Biosorption and Bioaccumulation Capacity of Arthospiraplatensis toward Europium Ions

Yushin

Zinicovscaia

Cepoi

et al. 2022

Water

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Europium recovery from wastewater is determined by its high significance for industry and toxicity for living organisms. The capacity of cyanobacteria Arthospira platensis (Spirulina) to remove Eu(III) through biosorption and bioaccumulation was evaluated. In biosorption experiments, the effects of four variables pH, metal concentration, time, and temperature on metal removal were studied. In bioaccumulation experiments, the effect of Eu(III) concentrations on biomass bioaccumulation capacity and biochemical composition was assessed. The efficiency of Eu(III) uptake in both experiments was determined using ICP-AES techniques. Maximum biosorption of Eu(III) was achieved at pH 3.0. Equilibrium data fitted well with the Langmuir and Freundlich models, with maximum adsorption capacity of 89.5 mg/g. The pseudo-first-, pseudo-second-order, and Elovich models were found to correlate well with the experimental data. According to thermodynamic studies the sorption was feasible, spontaneous, and endothermic in nature. At addition of Eu(III) ions in the cultivation medium in concentrations of 10–30 mg/L, its accumulation in biomass was 9.8–29.8 mg/g (removal efficiency constituting 98–99%). Eu(III) did not affect productivity and content of carbohydrates and pigments in biomass but led to the decrease of the content of protein and an increase in the amount of MDA. The high Eu(III) biosorption and bioaccumulation efficiency of Arthrospira platensis may constitute an effective and eco-friendly strategy to recover it from contaminated environment.

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Section: Bioaccummulationmentioning

confidence: 99%

Biosorption and Bioaccumulation Capacity of Arthospiraplatensis toward Europium Ions

Yushin

Zinicovscaia

Cepoi

et al. 2022

Water

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“…For example, large surface-active organic molecules such as polysaccharides act to bind colloid particles together and thus cause colloid instability. In addition, microbial polymers and exopolymers themselves can not only lead to adhesion of colloids and suspended particles, but also increase the sorption of actinides on them due to various organic functional groups 38 , 46 – 48 .…”

Section: Resultsmentioning

confidence: 99%

Risk of colloidal and pseudo-colloidal transport of actinides in nitrate contaminated groundwater near a radioactive waste repository after bioremediation

Safonov

Lavrinovich

Emel’yanov

et al. 2022

Sci Rep

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The possible role of biogeochemical processes in the transport of colloidal and pseudo-colloidal U, Np, and Pu during bioremediation of radionuclide- and nitrate-contaminated groundwater was investigated. In two laboratory experiments with water samples taken from contaminated aquifers before and post bioremediation, we found that microbial processes could cause clayed, ferruginous, and actinide colloids to coagulate. The main mechanisms are biogenic insoluble ferrous iron species formations (goethite, pyrrhotite, siderite, troilite, and ferrihydrite), the aggregation of clay particles by microbial metabolites, and the immobilization of actinides in the bacterial cells, large polymers, and iron and clayed sediments. This process decreases the risk of colloidal and pseudo-colloidal transport of actinides.

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“…In the environment, anthropogenic actions have shaped the presence of Zn and its compounds in industrial and agricultural wastewaters, underscoring the production (more than 12 million tons annually) and then consumption of Zn in a multitude of processes such as galvanization, metallurgy, and the pharmaceutical industry, alloy metal casting, pesticides, and production of several other consumer goods [ 204 ]. Moreover, mining activities and contamination of sludge in soils poses a considerable threat of Zn toxicity to the sustainability and quality of crops [ 205 ], which further raises concern for the purification of contaminated sites by effective methods.…”

Section: Bacillus Species and Heavy Metalsmentioning

confidence: 99%

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

2021

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The rise of anthropogenic activities has resulted in the increasing release of various contaminants into the environment, jeopardizing fragile ecosystems in the process. Heavy metals are one of the major pollutants that contribute to the escalating problem of environmental pollution, being primarily introduced in sensitive ecological habitats through industrial effluents, wastewater, as well as sewage of various industries. Where heavy metals like zinc, copper, manganese, and nickel serve key roles in regulating different biological processes in living systems, many heavy metals can be toxic even at low concentrations, such as mercury, arsenic, cadmium, chromium, and lead, and can accumulate in intricate food chains resulting in health concerns. Over the years, many physical and chemical methods of heavy metal removal have essentially been investigated, but their disadvantages like the generation of chemical waste, complex downstream processing, and the uneconomical cost of both methods, have rendered them inefficient,. Since then, microbial bioremediation, particularly the use of bacteria, has gained attention due to the feasibility and efficiency of using them in removing heavy metals from contaminated environments. Bacteria have several methods of processing heavy metals through general resistance mechanisms, biosorption, adsorption, and efflux mechanisms. Bacillus spp. are model Gram-positive bacteria that have been studied extensively for their biosorption abilities and molecular mechanisms that enable their survival as well as their ability to remove and detoxify heavy metals. This review aims to highlight the molecular methods of Bacillus spp. in removing various heavy metals ions from contaminated environments.

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Zinc-Containing Effluent Treatment Using Shewanella xiamenensis Biofilm Formed on Zeolite

Cited by 14 publications

References 36 publications

Biosorption and Bioaccumulation Capacity of Arthospiraplatensis toward Europium Ions

Biosorption and Bioaccumulation Capacity of Arthospiraplatensis toward Europium Ions

Risk of colloidal and pseudo-colloidal transport of actinides in nitrate contaminated groundwater near a radioactive waste repository after bioremediation

Unraveling the Underlying Heavy Metal Detoxification Mechanisms of Bacillus Species

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