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Treatment of Hexavalent Chromium Contaminated Wastewater Using Activated Carbon Derived from Coconut Shell Loaded by Silver Nanoparticles: Batch Experiment

  • Lan Huong Nguyen
  • Thi Minh Phuong Nguyen
  • Huu Tap Van
  • Xuan Hoa Vu
  • Thi Lan Anh Ha
  • Thi Hong Vien Nguyen
  • Xuan Hoan Nguyen
  • X.C. NguyenEmail author
Article
  • 114 Downloads

Abstract

Chromium (Cr(VI)) causes serious impacts on the environment and human. In this study, the commercial activated carbon-loaded silver nanoparticle (AgNPs-AC) was used as a new adsorbent to remove Cr(VI) from the aqueous solution. Batch adsorption experiments were conducted to evaluate the effects of pH, the initial concentration of Cr(VI), contact time, and dose of AgNPs-AC upon removal of Cr(VI) from the aqueous solution. The results showed that at pH of 4, the contact time of 150 min, 40 mg/L of initial Cr(VI), and dosage of 20 mg AgNPs-AC/25 mL were the most suitable condition for absorption of Cr(VI) onto AgNPs-AC from the aqueous solution. The maximum adsorption capacity achieved at abovementioned conditions was 27.70 mg/g. Meanwhile, the adsorption capacity of commercial activated carbon from a coconut shell obtained only 7.61 mg/g in the case where the initial Cr(VI) concentration is 10 mg/L and the contact time is 60 min. The adsorption kinetic data were found to fit best to the pseudo-second-order model with a high correlation coefficient (R2 = 0.9597). The adsorption process was controlled by chemisorption due to the appearance of new chemical species on the adsorbent surface. The positively charged functional groups rapidly reduced Cr(VI) to Cr(III), and Cr(III) was subsequently adsorbed by the carboxyl group on the adsorbent’s surface. From this study, it can be concluded that AgNPs-AC is a fully promising, low-cost adsorbent in the removal of Cr(VI) from the aqueous solution.

Keywords

AgNPs-AC Adsorption Activated carbon Hexavalent chromium Silver nanoparticles 

Notes

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Faculty of Environment – Natural Resources and Climate ChangeHo Chi Minh City University of Food Industry (HUFI)Ho Chi Minh CityVietnam
  2. 2.Faculty of Environment and Chemical EngineeringDuy Tan University (DTU)Da NangVietnam
  3. 3.Faculty of Natural Resources and EnvironmentThai Nguyen University of Sciences (TNUS)Thai NguyenVietnam
  4. 4.Faculty of Physic and TechnologyThai Nguyen University of Sciences (TNUS)Thai Nguyen CityVietnam
  5. 5.Advanced Education Program OfficeThai Nguyen University of Agriculture and Forestry (TUAF)Thai Nguyen CityVietnam
  6. 6.Laboratory of Advanced Materials Chemistry, Advanced Institute of Materials ScienceTon Duc Thang UniversityHo Chi Minh CityVietnam
  7. 7.Faculty of Applied SciencesTon Duc Thang UniversityHo Chi Minh CityVietnam

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