Identification of the function of extracellular polymeric substances (EPS) in denitrifying phosphorus removal sludge in the presence of copper ion

Wang, Yayi; Qin, Jian; Zhou, Shuai; Lin, Ximao; Ye, Liu; Song, Chengkang; Yuan, Yan

doi:10.1016/j.watres.2015.01.034

Cited by 143 publications

(24 citation statements)

References 33 publications

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“…The aromatic protein-like, hydrophobic acid-like substances and humic acid-like substances (peak C) had a clear binding affinity for cobalt. Aromatic protein-like and humic acid-like substances have been found to easily trap copper (Wang et al 2015;Wei et al 2017). The differences in affinities of these substances for metals could explain the differences in the recovery efficiency for cobalt and nickel influenced by EPS.…”

Section: Discussionmentioning

confidence: 99%

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Yang

Song

Ferrier

et al. 2019

Appl Microbiol Biotechnol

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In this research, the capabilities of culture supernatants generated by the oxalate-producing fungus Aspergillus niger for the bioprecipitation and biorecovery of cobalt and nickel were investigated, as was the influence of extracellular polymeric substances (EPS) on these processes. The removal of cobalt from solution was >90% for all tested Co concentrations: maximal nickel recovery was >80%. Energy-dispersive X-ray analysis (EDXA) and X-ray diffraction (XRD) confirmed the formation of cobalt and nickel oxalate. In a mixture of cobalt and nickel, cobalt oxalate appeared to predominate precipitation and was dependent on the mixture ratios of the two metals. The presence of EPS together with oxalate in solution decreased the recovery of nickel but did not influence the recovery of cobalt. Concentrations of extracellular protein showed a significant decrease after precipitation while no significant difference was found for extracellular polysaccharide concentrations before and after oxalate precipitation. These results showed that extracellular protein rather than extracellular polysaccharide played a more important role in influencing the biorecovery of metal oxalates from solution. Excitation-emission matrix (EEM) fluorescence spectroscopy showed that aromatic protein-like and hydrophobic acid-like substances from the EPS complexed with cobalt but did not for nickel. The humic acid-like substances from the EPS showed a higher affinity for cobalt than for nickel.

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Section: Discussionmentioning

confidence: 99%

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Yang

Song

Ferrier

et al. 2019

Appl Microbiol Biotechnol

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“…In addition, the residual concentration of copper(II) ions in remaining solution aer adsorption reaction nished (4A-Cu-300) was measured due to its high toxicity to aquatic lives and human beings. 60,61 The measurement results of inductively coupled plasma-mass spectrometry (ICP-MS) exhibited that the concentration of total copper in aqueous solution was about 0.13 mg L À1 , which was far below the regulatory limit of the People' Republic of China drinking water standard (GB5749-2006) and integrated wastewater discharge standard (GB8978-2002). At the same time, only ca.…”

Section: Resultsmentioning

confidence: 99%

Hectogram-scale green synthesis of hierarchical 4A zeolite@CuO_x(OH)_(2−2x) (0 ≤ x < 1) nanosheet assemblies core–shell nanoarchitectures with Superb Congo red adsorption performance

Zhang

Huang

et al. 2020

RSC Adv.

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“…The decrease in EPS could be attributed to its biodegradation to sustain the vital metabolic processes [33]. Wang et al [31] also reported that once Cu 2+ additions reached 3 mg L −1 , EPS quantity decreased markedly due to the higher accumulation of copper ions in the denitrifying phosphorus removal sludge. In the following experimental Runs (IV to V), EPS production decreased continuously, but the reduction reduced slightly.…”

Section: Eps Production and Its Componentmentioning

confidence: 99%

“…EPS serves as charged functional groups and has the ability to bind other charged particles or molecules [29,30]. Heavy metal ions could be adsorbed by EPS before they enter cells, thus reduces the potential toxicity caused by heavy metals to functional bacteria in activated sludge [31]. Harrison et al [32] also reported that EPS can build up a protective barrier for the microbes against the harsh external environment.…”

Section: Eps Production and Its Componentmentioning

confidence: 99%

Effects of Cu²⁺ on biological process of wastewater treatment plant (WWTP) in electroplating industrial park

Wen

Wang

Chen

et al. 2016

Desalination and Water Treatment

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A B S T R A C TThe construction of industrial clusters in China increases the possibility of treating heavy metals containing wastewater by biological treatment process. Those heavy metals which entered wastewater treatment systems will have a toxic impact on the bacteria. The effects of 0-10 mg L −1 Cu 2+ on the performance of an anoxic/oxic-membrane bioreactor (A/O-MBR) process, which simulated the wastewater treatment process in a local surface processing industrial park, in treating electroplating mixed wastewater were investigated in this research. Under the experimental conditions (simulated the real influent scenario), COD removal efficiency and nitrification efficiency of the process were obviously inhibited by 5 and 3 mg L −1 Cu 2+ , respectively, while were severely inhibited by 10 and 5 mg L −1 Cu 2+ , respectively. Above 1 mg L −1 of Cu 2+ would put negative effects on the activities of both autotrophic and heterotrophic bacteria, moreover, autotrophic bacteria were more sensitive to Cu 2+ than heterotrophic bacteria. The synthesis of the extracellular polymeric substance (EPS) can be stimulated by 1 mg L −1 Cu 2+ while inhibited at higher concentrations. The quantity of EPS was in direct proportion to that of proteins in the experiment indicated that proteins in EPS played a major role in protecting cells from the harm of heavy metals.

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Identification of the function of extracellular polymeric substances (EPS) in denitrifying phosphorus removal sludge in the presence of copper ion

Cited by 143 publications

References 33 publications

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Hectogram-scale green synthesis of hierarchical 4A zeolite@CuO_x(OH)_(2−2x) (0 ≤ x < 1) nanosheet assemblies core–shell nanoarchitectures with Superb Congo red adsorption performance

Effects of Cu²⁺ on biological process of wastewater treatment plant (WWTP) in electroplating industrial park

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Identification of the function of extracellular polymeric substances (EPS) in denitrifying phosphorus removal sludge in the presence of copper ion

Cited by 143 publications

References 33 publications

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger

Hectogram-scale green synthesis of hierarchical 4A zeolite@CuOx(OH)(2−2x) (0 ≤ x < 1) nanosheet assemblies core–shell nanoarchitectures with Superb Congo red adsorption performance

Effects of Cu2+ on biological process of wastewater treatment plant (WWTP) in electroplating industrial park

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Product

Resources

About

Hectogram-scale green synthesis of hierarchical 4A zeolite@CuO_x(OH)_(2−2x) (0 ≤ x < 1) nanosheet assemblies core–shell nanoarchitectures with Superb Congo red adsorption performance

Effects of Cu²⁺ on biological process of wastewater treatment plant (WWTP) in electroplating industrial park