Bioremediation of wastewater by iron Oxide-Biochar nanocomposites loaded with photosynthetic bacteria

Shiying He, Linghao Zhong, Jingjing Duan, Yanfang Feng, Bei Yang, Linzhang Yang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

It has been reported that bacteria-mediated degradation of contaminants is a practical and innocuous wastewater treatment. In addition, iron oxide nanoparticles (NP) are wastewater remediation agents with great potentials due to their strong adsorption capacity, chemical inertness and superparamagnetism. Therefore, a combination of NPs and microbes could produce a very desirable alternative to conventional wastewater treatment. For this purpose, we first prepared Fe3O4/biochar nano-composites, followed by loading photosynthetic bacteria (PSB) onto them. It was found that Fe3O4/biochar nano-composites exhibited a high adsorption capacity for PSB (5.45 × 109 cells/g). The efficiency of wastewater pollutants removal by this PSB/Fe3O4/biochar agent was then analyzed. Our results indicated that when loaded onto Fe3O4/biochar nano-composites, PSB's nutrient removal capability was significantly enhanced (P < 0.05). This agent removed 83.1% of chemical oxygen demand, 87.5% of NH4+, and 92.1% of PO43- from the wastewater in our study. Our experiments also demonstrated that such composites are outstanding recyclable agents. Their nutrient removal capability remained effective even after five cycles. In conclusion, we found the PSB/Fe3O4/biochar composites as a very promising material for bioremediation in the wastewater treatment.

Original languageEnglish (US)
Article number823
JournalFrontiers in Microbiology
Volume8
Issue numberMAY
DOIs
StatePublished - May 23 2017

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Nanocomposites
Environmental Biodegradation
Waste Water
Bacteria
Adsorption
Biological Oxygen Demand Analysis
Food
Nanoparticles
biochar
ferric oxide

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Microbiology (medical)

Cite this

He, Shiying ; Zhong, Linghao ; Duan, Jingjing ; Feng, Yanfang ; Yang, Bei ; Yang, Linzhang. / Bioremediation of wastewater by iron Oxide-Biochar nanocomposites loaded with photosynthetic bacteria. In: Frontiers in Microbiology. 2017 ; Vol. 8, No. MAY.
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abstract = "It has been reported that bacteria-mediated degradation of contaminants is a practical and innocuous wastewater treatment. In addition, iron oxide nanoparticles (NP) are wastewater remediation agents with great potentials due to their strong adsorption capacity, chemical inertness and superparamagnetism. Therefore, a combination of NPs and microbes could produce a very desirable alternative to conventional wastewater treatment. For this purpose, we first prepared Fe3O4/biochar nano-composites, followed by loading photosynthetic bacteria (PSB) onto them. It was found that Fe3O4/biochar nano-composites exhibited a high adsorption capacity for PSB (5.45 × 109 cells/g). The efficiency of wastewater pollutants removal by this PSB/Fe3O4/biochar agent was then analyzed. Our results indicated that when loaded onto Fe3O4/biochar nano-composites, PSB's nutrient removal capability was significantly enhanced (P < 0.05). This agent removed 83.1{\%} of chemical oxygen demand, 87.5{\%} of NH4+, and 92.1{\%} of PO43- from the wastewater in our study. Our experiments also demonstrated that such composites are outstanding recyclable agents. Their nutrient removal capability remained effective even after five cycles. In conclusion, we found the PSB/Fe3O4/biochar composites as a very promising material for bioremediation in the wastewater treatment.",
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Bioremediation of wastewater by iron Oxide-Biochar nanocomposites loaded with photosynthetic bacteria. / He, Shiying; Zhong, Linghao; Duan, Jingjing; Feng, Yanfang; Yang, Bei; Yang, Linzhang.

In: Frontiers in Microbiology, Vol. 8, No. MAY, 823, 23.05.2017.

Research output: Contribution to journalArticle

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