• 文献标题:   Mussel-Inspired biosorbent combined with graphene oxide for removal of organic pollutants from aqueous solutions
  • 文献类型:   Article
  • 作  者:   THU VT, TRIEU MH, AN NHT, DAT NT, LINH ND, MANH NB
  • 作者关键词:   nanosorbent, methylene blue, water remediation, mussel inspired surface chemistry, graphene oxide
  • 出版物名称:   ECOTOXICOLOGY ENVIRONMENTAL SAFETY
  • ISSN:   0147-6513 EI 1090-2414
  • 通讯作者地址:  
  • 被引频次:   1
  • DOI:   10.1016/j.ecoenv.2023.114793 EA MAR 2023
  • 出版年:   2023

▎ 摘  要

In this work, we develop a mussel-inspired biosorbent combined with graphene oxide for removal of organic dyes in water sources. The composite was prepared via self-polymerization of dopamine in weak alkaline solution containing graphene oxide at ambient condition. Morphological and structural studies revealed that polydop-amine has gradually grown to cover the surface of graphene oxide flakes, partially reduced these flakes, and somehow form many grains (size around 20 nm) on the flakes instead of making very large aggregates as usual. The mass ratio between two components of the composite was also investigated to find the optimal one which provides enough surface area (20 m2.g- 1) and maintain adhesive sites in order to ensure high-efficiency removal of organic molecules. The adsorption kinetics and isotherms of as-prepared adsorbent towards methylene blue were found to fit well with pseudo-first order kinetics model and Langmuir isotherm. The maximum adsorption capacity (qm) and Langmuir constant (kL) were estimated to be 270 mg.g-1 and 0.49 L. mg -1. The as-prepared bio-sorbent is very promising for remediation of water sources contaminated with cationic organic molecules and heavy metal ions.