Wastewater produced from polymer flooding in oil production features high viscosity and chemical oxygen demand because of the residue of high-concentration polymer hydrolysed polyacrylamide (HPAM). In this study, steel slag, a waste from steel manufacturing, was studied as a low-cost adsorbent for HPAM in wastewater. Optimisation of HPAM adsorption by steel slag was performed with a central composite design under response surface methodology (RSM). Results showed that the maximum removal efficiency of 89.31% was obtained at an adsorbent dosage of 105.2 g/L, contact time of 95.4 min and pH of 5.6. These data were strongly correlated with the experimental values of the RSM model. Single and interactive effect analysis showed that HPAM removal efficiency increased with increasing adsorbent dosage and contact time. Efficiency increased when pH was increased from 2.6 to 5.6 and subsequently decreased from 5.6 to 9.3. It was observed that removal efficiency significantly increased (from 0% to 86.1%) at the initial stage (from 0 min to 60 min) and increased gradually after 60 min with an adsorbent dosage of 105.2 g/L, pH of 5.6. The adsorption kinetics was well correlated with the pseudo-second-order equation. Removal of HPAM from the studied water samples indicated that steel slag can be utilised for the pre-treatment of polymer-flooding wastewater.
Skip Nav Destination
Article navigation
Research Article|
April 26 2017
Response surface methodology approach for the optimisation of adsorption of hydrolysed polyacrylamide from polymer-flooding wastewater onto steel slag: a good option of waste mitigation
Mijia Zhu;
Mijia Zhu
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Search for other works by this author on:
Jun Yao;
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
2School of Water Resource and Environmental Engineering, China University of Geosciences (Beijing), Beijing 100083, China
E-mail: yaojun@ustb.edu.cn
Search for other works by this author on:
Zhonghai Qin;
Zhonghai Qin
3Petroleum Production Engineering Research Institute, PetroChina Huabei Oilfield Company, Renqiu 062550, China
Search for other works by this author on:
Luning Lian;
Luning Lian
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Search for other works by this author on:
Chi Zhang
Chi Zhang
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China
Search for other works by this author on:
Water Sci Technol (2017) 76 (4): 776–784.
Article history
Received:
September 11 2016
Accepted:
April 18 2017
Citation
Mijia Zhu, Jun Yao, Zhonghai Qin, Luning Lian, Chi Zhang; Response surface methodology approach for the optimisation of adsorption of hydrolysed polyacrylamide from polymer-flooding wastewater onto steel slag: a good option of waste mitigation. Water Sci Technol 11 August 2017; 76 (4): 776–784. doi: https://doi.org/10.2166/wst.2017.245
Download citation file:
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Could not validate captcha. Please try again.
Impact Factor 2.430
CiteScore 3.4 • Q2
13 days submission to first
decision
1,439,880 downloads in 2021