Biosorption of high-concentration Cu (II) by periphytic biofilms and the development of a fiber periphyton bioreactor (FPBR)

Liu, Junzhuo; Wang, Fengwu; Wu, Wantong; Wan, Juanjuan; Yang, Jiali; Xiang, Song; Wu, Yonghong

doi:10.1016/j.biortech.2017.06.037

Cited by 34 publications

(13 citation statements)

References 38 publications

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“…Another interesting aspect of the novel isolates of methanotrophs was their resistance to various types of pollutions (heavy metals, arsenate or organic) and were considered to be real 'super-bugs' due to their capability to withstand remarkably high concentration of various pollutants [52]. The abundance of extracellular polymeric substances, plays a key role in the higher removal efficacies of periphytic biofilms [21] as well as in-tank microbial activity [53].…”

Section: Effect Of Methane Oxidation On Heavy Metal Bioremediationmentioning

confidence: 99%

“…Periphyton are also known as an in situ strategy that has a promising role to stabilize micro-ecosystem, as well as in the restoration of devastated surface water ecologies [19] while the complex microbial communities and porous structures within can retain heavy metals [20]. Many microbial communities in periphytons are capable of adsorbing heavy metals by the secretion of extra polymeric substances (EPS) from cyanobacteria, green algae, diatoms and a variety of other bacteria [21]. Due to the intricate community structures, periphytic biofilms have a high resilience and capability to habituate to a wide range of concentrations of heavy metals and can maintain sustainable metabolic activities [22,23].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Adsorptive Bioremediation of Heavy Metals (Cd2+, Cr6+, Pb2+) by Methane-Oxidizing Epipelon

et al. 2020

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Cadmium (Cd), chromium (Cr) and lead (Pb) are heavy metals that have been classified as priority pollutants in aqueous environment while methane-oxidizing bacteria as a biofilter arguably consume up to 90% of the produced methane in the same aqueous environment before it escapes into the atmosphere. However, the underlying kinetics and active methane oxidizers are poorly understood for the hotspot of epipelon that provides a unique micro-ecosystem containing diversified guild of microorganisms including methane oxidizers for potential bioremediation of heavy metals. In the present study, the Pb2+, Cd2+and Cr6+ bioremediation potential of epipelon biofilm was assessed under both high (120,000 ppm) and near-atmospheric (6 ppm) methane concentrations. Epipelon biofilm demonstrated a high methane oxidation activity following microcosm incubation amended with a high concentration of methane, accompanied by the complete removal of 50 mg L−1 Pb2+ and 50 mg L−1 Cd2+ (14 days) and partial (20%) removal of 50 mg L−1 Cr6+ after 20 days. High methane dose stimulated a faster (144 h earlier) heavy metal removal rate compared to near-atmospheric methane concentrations. DNA-based stable isotope probing (DNA-SIP) following 13CH4 microcosm incubation revealed the growth and activity of different phylotypes of methanotrophs during the methane oxidation and heavy metal removal process. High throughput sequencing of 13C-labelled particulate methane monooxygenase gene pmoA and 16S rRNA genes revealed that the prevalent active methane oxidizers were type I affiliated methanotrophs, i.e., Methylobacter. Type II methanotrophs including Methylosinus and Methylocystis were also labeled only under high methane concentrations. These results suggest that epipelon biofilm can serve as an important micro-environment to alleviate both methane emission and the heavy metal contamination in aqueous ecosystems with constant high methane fluxes.

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Section: Effect Of Methane Oxidation On Heavy Metal Bioremediationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhanced Adsorptive Bioremediation of Heavy Metals (Cd2+, Cr6+, Pb2+) by Methane-Oxidizing Epipelon

et al. 2020

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“…Accordingly, periphyton remove heavy metals by three main mechanisms: adsorption in extracellular polymeric substances, cell surface adsorption and intracellular uptake [9]. Previous studies have indicated that biosorption could be the primary mechanism of Cu 2+ removal by periphyton and the fast removal efficiency was due to the external mass transfer, followed by intra-particle diffusion [10].…”

Section: Periphyton Characterizaiton and Cu 2+ Removal Efficiencymentioning

confidence: 99%

“…Periphyton is ubiquitous in aquatic environments mainly consisting of algae, fungi and bacteria [8,9]. Periphyton has been shown to be capable of improving the water quality by adsorpting and trapping heavy metals and organic molecules in water [9][10][11][12]. In addition, periphyton is important for the ecological functions of aquatic environments, playing crucial roles in primary productivity, trophic transfer of nutrients and food source biomasses in aquatic ecosystems [8,13,14].…”

Section: Introductionmentioning

confidence: 99%

Responses of Periphyton Microbial Growth, Activity, and Pollutant Removal Efficiency to Cu Exposure

Zhong

Zhao²,

Song³

2020

IJERPH

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Periphyton is an effective matrix for the removal of pollutants in wastewater and has been considered a promising method of bioremediation. However, it still needs to be verified whether periphyton can maintain microbial activity and pollutant removal efficiency when dealing with the influence with complex components, and the underlying mechanisms of periphyton need to be revealed further. Herein, this study investigated the microbial growth, activity and functional responses of periphyton after removal of Cu from wastewater. Results showed that the cultivated periphyton was dominated by filamentous algae, and high Cu removal efficiencies by periphyton were obtained after 108 h treatments. Although 2 mg/L Cu2+ changed the microalgal growth (decreasing the contents of total chlorophyll-a (Chla), the carbon source utilization and microbial metabolic activity in periphyton were not significantly affected and even increased by 2 mg/L Cu2+. Moreover, chemical oxygen demand (COD) removal rates were sustained after 0.5 and 2 mg/L Cu2+ treatments. Our work showed that periphyton had strong tolerance and resistance on Cu stress and is environmentally friendly in dealing with wastewater containing heavy metals, as the microbial functions in pollutant removal could be maintained.

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“…3,4 Among these, adsorption is considered to be an effective and economic technology because various adsorbents can be produced from agricultural and forestry residues (usually biomass) with signicance for "dealing with waste by waste".…”

Section: Introductionmentioning

confidence: 99%

Raw walnut shell modified by non-thermal plasma in ultrafine water mist for adsorptive removal of Cu(ii) from aqueous solution

Shang

Chen

et al. 2018

RSC Adv.

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Non-thermal plasma in ultrafine water mist (UWM) is proposed to increase the content of COOH groups on the surface of raw walnut shell in order to improve its performance in the removal of Cu(II) from wastewater.The modified walnut shell surface was characterized by various techniques (BET, SEM-EDX and XPS), and it was observed that more COOH groups were generated. Oxygen disassociated from water mist by plasma bonded with the walnut shell to form activated sites of COOH groups. After Cu(II) adsorption, the COOH group content in the walnut shell decreased because some groups were changed into C-O groups by Cu(II) chemisorption with COOH groups. The Cu(II) removal efficiency was 33.5% for raw walnut shell; however, the efficiency increased to 98% after plasma modification for 15 min under 3 g min À1 watermist. The maximum Cu(II) adsorption capacity of the UWM-plasma-modified WNS was 39.4 mg g À1 at pH 5.3 and 25 C, around 8 times that of the raw WNS. This implies that UWM-plasma modification is a potential method for improving the Cu(II) adsorption performance of raw biomass.

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Biosorption of high-concentration Cu (II) by periphytic biofilms and the development of a fiber periphyton bioreactor (FPBR)

Cited by 34 publications

References 38 publications

Enhanced Adsorptive Bioremediation of Heavy Metals (Cd2+, Cr6+, Pb2+) by Methane-Oxidizing Epipelon

Enhanced Adsorptive Bioremediation of Heavy Metals (Cd2+, Cr6+, Pb2+) by Methane-Oxidizing Epipelon

Responses of Periphyton Microbial Growth, Activity, and Pollutant Removal Efficiency to Cu Exposure

Raw walnut shell modified by non-thermal plasma in ultrafine water mist for adsorptive removal of Cu(ii) from aqueous solution

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