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Efficient removal of tetracycline with KOH-activated graphene from aqueous solution.

ABSTRACT: Activated graphene absorbents with high specific surface area (SSA) were prepared by an easy KOH-activated method, and were applied in absorbing antibiotics, such as tetracycline (TC). After activation, many micropores were introduced to graphene oxide sheets, leading to higher SSA and many new oxygen-containing functional groups, which gave KOH-activated graphene excellent adsorption capacity (approx. 532.59?mg?g-1) of TC. Further study on the adsorption mechanism showed that the Langmuir isotherm model and the pseudo-second-order kinetic model fitted with experiment data. To further understand the adsorption process, the effects of solid-liquid ratio, pH, ionic strength and coexisting ions were also investigated. The results revealed that, compared with pH and ionic strength, solid-liquid ratio and coexisting ions (Cu2+, CrO42-) had more significant influence over the adsorption performance. The findings provide guidance for application of KOH-activated graphene as a promising alternative adsorbent for antibiotics removal from aqueous solutions.

SUBMITTER: Ma J 

PROVIDER: S-EPMC5717638 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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Efficient removal of tetracycline with KOH-activated graphene from aqueous solution.

Ma Jie J   Sun Yiran Y   Yu Fei F  

Royal Society open science 20171129 11

Activated graphene absorbents with high specific surface area (SSA) were prepared by an easy KOH-activated method, and were applied in absorbing antibiotics, such as tetracycline (TC). After activation, many micropores were introduced to graphene oxide sheets, leading to higher SSA and many new oxygen-containing functional groups, which gave KOH-activated graphene excellent adsorption capacity (approx. 532.59 mg g<sup>-1</sup>) of TC. Further study on the adsorption mechanism showed that the Lan  ...[more]

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