Magnetic graphene-based nanocomposites as highly efficient absorbents for Cr(VI) removal from wastewater

Due to the merits of their high adsorption and convenient separation, magnetic graphene-based composites have become a promising adsorbent in terms of wastewater treatment. However, recycling and regeneration properties of magnetic graphene-based composites are still a conundrum, which remains to be...

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Veröffentlicht in:Environmental science and pollution research international 2021-03, Vol.28 (12), p.14671-14680
Hauptverfasser: Zhang, Xiuxiu, Yi, Guiyun, Zhang, Zhengting, Yu, Jia, Fan, Haiyang, Li, Peng, Zeng, Huihui, Xing, Baolin, Chen, Lunjian, Zhang, Chuanxiang
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container_end_page 14680
container_issue 12
container_start_page 14671
container_title Environmental science and pollution research international
container_volume 28
creator Zhang, Xiuxiu
Yi, Guiyun
Zhang, Zhengting
Yu, Jia
Fan, Haiyang
Li, Peng
Zeng, Huihui
Xing, Baolin
Chen, Lunjian
Zhang, Chuanxiang
description Due to the merits of their high adsorption and convenient separation, magnetic graphene-based composites have become a promising adsorbent in terms of wastewater treatment. However, recycling and regeneration properties of magnetic graphene-based composites are still a conundrum, which remains to be resolved. Here, Fe 3 O 4 /reduced graphene oxide (RGO) (Fe 3 O 4 /RGO) nanocomposites were synthesized by one-step solvent-thermal reduction route and used as adsorbents for water purification. It was encouraging to find that the nanocomposites possessed many intriguing properties in removing of Cr(VI) ions, including high adsorption efficiency and excellent recycling and regeneration property. The results indicated that the magnetic separation process of the Fe 3 O 4 /RGO nanocomposites only took less than 5 s and the maximum removal efficiency of Cr(VI) reached 99.9% under the optimum experimental conditions. Most significantly, the adsorption rate of Cr(VI) can still be as high as 98.13% after 10 cycles and the single recycle quality of the nanocomposites can maintain at more than 80%. As a result, the Fe 3 O 4 /RGO nanocomposites could be a potential adsorbent for removing heavy metal ions effectively, especially in environmental protection and restoration.
doi_str_mv 10.1007/s11356-020-11634-x
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However, recycling and regeneration properties of magnetic graphene-based composites are still a conundrum, which remains to be resolved. Here, Fe 3 O 4 /reduced graphene oxide (RGO) (Fe 3 O 4 /RGO) nanocomposites were synthesized by one-step solvent-thermal reduction route and used as adsorbents for water purification. It was encouraging to find that the nanocomposites possessed many intriguing properties in removing of Cr(VI) ions, including high adsorption efficiency and excellent recycling and regeneration property. The results indicated that the magnetic separation process of the Fe 3 O 4 /RGO nanocomposites only took less than 5 s and the maximum removal efficiency of Cr(VI) reached 99.9% under the optimum experimental conditions. Most significantly, the adsorption rate of Cr(VI) can still be as high as 98.13% after 10 cycles and the single recycle quality of the nanocomposites can maintain at more than 80%. 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However, recycling and regeneration properties of magnetic graphene-based composites are still a conundrum, which remains to be resolved. Here, Fe 3 O 4 /reduced graphene oxide (RGO) (Fe 3 O 4 /RGO) nanocomposites were synthesized by one-step solvent-thermal reduction route and used as adsorbents for water purification. It was encouraging to find that the nanocomposites possessed many intriguing properties in removing of Cr(VI) ions, including high adsorption efficiency and excellent recycling and regeneration property. The results indicated that the magnetic separation process of the Fe 3 O 4 /RGO nanocomposites only took less than 5 s and the maximum removal efficiency of Cr(VI) reached 99.9% under the optimum experimental conditions. Most significantly, the adsorption rate of Cr(VI) can still be as high as 98.13% after 10 cycles and the single recycle quality of the nanocomposites can maintain at more than 80%. 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subjects Adsorbents
Adsorption
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Chromium
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental protection
Environmental restoration
Environmental science
Graphene
Graphite
Heavy metals
Iron oxides
Magnetic Phenomena
Magnetic properties
Magnetic separation
Metal ions
Nanocomposites
Recycling
Regeneration
Research Article
Thermal reduction
Waste Water
Waste Water Technology
Wastewater treatment
Water Management
Water Pollutants, Chemical - analysis
Water Pollution Control
Water purification
title Magnetic graphene-based nanocomposites as highly efficient absorbents for Cr(VI) removal from wastewater
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