Journal
DESALINATION AND WATER TREATMENT
Volume 83, Issue -, Pages 168-175Publisher
DESALINATION PUBL
DOI: 10.5004/dwt.2017.21033
Keywords
Lignosulfonate; Graphene oxide; Hydrogels; Adsorption
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Funding
- State Key Laboratory of Pulp and Paper Engineering, China [2015ZD04, 2016QN01]
- National Natural Science Foundation of China [31400512]
- 111 plan project
- Guangdong provincial science & technology plan project [2015B020241001]
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In the present study, a new solid adsorbent, lignosulfonate-graphene oxide-acrylamide (LS-GO-AM) ternary composite hydrogel possessing good mechanical strength and high dye adsorption capacity, was prepared by a simple polymerization, and used for the removal of dyes from aqueous solution. The adsorption property of a model dye, methylene blue (MB), onto the hydrogel was studied. The effects of adsorption time, initial pH, and concentration were investigated. When the initial MB concentration was 3 mg.L-1 at an LS-GO-AM concentration of 4 g.L-1, the absorption was 98.36% while the solution was nearly decolorized. Moreover, adsorption kinetic and equilibrium data were described well with pseudo-second-order and Langmuir isotherm models for MB adsorption. The LS-GO-AM composite hydrogel with enhanced mechanical strength could be easily separated from the reaction system.
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