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Study on Papermaking Wastewater Treatment by Composite Hydrogels of Titanium Dioxide and Graphene Oxide
  
DOI：10.11980/j.issn.0254-508X.2018.12.004
Key Words:papermaking wastewater  graphene  titania nanoparticles  hydrogels  adsorption model
Fund Project:国家自然科学基金（No. 51522805）。
Author NameAffiliation
ZHANG Chang-Fei Nanjing Institute of Technology， Nanjing， Jiangsu Province， 211167 
ZHENG Kai* Nanjing Institute of Technology， Nanjing， Jiangsu Province， 211167 
LI Qian-jun Nanjing Institute of Technology， Nanjing， Jiangsu Province， 211167 
ZHANG Fang Nanjing Institute of Technology， Nanjing， Jiangsu Province， 211167 
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Abstract:The composite hydrogels of titania nanoparticles and graphene oxide were prepared by hydrothermal synthesis.The adsorption experiment of pretreated papermaking wastewater by composite hydrogels was carried out.The effects of pH value， temperature， adsorption time and the input amount of hydrogels on the removal rate of CODCr of the papermaking wastewater were studied， so as to obtain the appropriate adsorption conditions.The results showed that pH value 7.89， temperature 30℃， adsorption time 10 h， the input amount of hydrogels 0.5 g/L， the CODCr of wastewater decreased from 355 mg/L to 13.6 mg/L， and CODCr removal rate reached 98.8% The adsorption was suit for Langmuir model and KL=0.47 L/mg， qm=112.35 mg/g，R2=0.9975.
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