TY - JOUR
T1 - Ice-templated graphene oxide/chitosan aerogel as an effective adsorbent for sequestration of metanil yellow dye
AU - Lai, Kar Chiew
AU - Hiew, Billie Yan Zhang
AU - Lee, Lai Yee
AU - Gan, Suyin
AU - Thangalazhy-Gopakumar, Suchithra
AU - Chiu, Wee Siong
AU - Khiew, Poi Sim
N1 - Funding Information:
The authors gratefully acknowledge the support provided by the Ministry of Higher Education (MOHE), Malaysia under the Fundamental Research Grant Scheme (FRGS/1/2015/SG06/UNIM/02/1).
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/2
Y1 - 2019/2
N2 - Graphene oxide/chitosan aerogel (GOCA) was prepared by a facile ice-templating technique without using any cross-linking reagent for metanil yellow dye sequestration. The adsorption performance of GOCA was investigated by varying the adsorbent mass, shaking speed, initial pH, contact time, concentration and temperature. The combined effects of adsorption parameters and the optimum conditions for dye removal were determined by response surface methodology. GOCA exhibited large removal efficiencies (91.5–96.4%) over a wide pH range (3–8) and a high adsorption capacity of 430.99 mg/g at 8 mg adsorbent mass, 400 mg/L concentration, 35.19 min contact time and 175 rpm shaking speed. The adsorption equilibrium was best represented by the Langmuir model. GOCA could be easily separated after adsorption and regenerated for re-use in 5 adsorption-desorption cycles thereby maintaining 80% of its adsorption capability. The relatively high adsorption and regeneration capabilities of GOCA render it an attractive adsorbent for treatment of azo dye-polluted water.
AB - Graphene oxide/chitosan aerogel (GOCA) was prepared by a facile ice-templating technique without using any cross-linking reagent for metanil yellow dye sequestration. The adsorption performance of GOCA was investigated by varying the adsorbent mass, shaking speed, initial pH, contact time, concentration and temperature. The combined effects of adsorption parameters and the optimum conditions for dye removal were determined by response surface methodology. GOCA exhibited large removal efficiencies (91.5–96.4%) over a wide pH range (3–8) and a high adsorption capacity of 430.99 mg/g at 8 mg adsorbent mass, 400 mg/L concentration, 35.19 min contact time and 175 rpm shaking speed. The adsorption equilibrium was best represented by the Langmuir model. GOCA could be easily separated after adsorption and regenerated for re-use in 5 adsorption-desorption cycles thereby maintaining 80% of its adsorption capability. The relatively high adsorption and regeneration capabilities of GOCA render it an attractive adsorbent for treatment of azo dye-polluted water.
KW - Adsorption
KW - Chitosan/graphene oxide aerogel
KW - Ice-templating
KW - Metanil yellow dye
UR - http://www.scopus.com/inward/record.url?scp=85057288905&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2018.11.048
DO - 10.1016/j.biortech.2018.11.048
M3 - Article
C2 - 30502604
AN - SCOPUS:85057288905
SN - 0960-8524
VL - 274
SP - 134
EP - 144
JO - Bioresource Technology
JF - Bioresource Technology
ER -
