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- Title
Experimental study on the treatment of polyacrylamide wastewater by non-equilibrium plasma.
- Authors
Xiaobing Wang; Chenyang Zhu; Sen Li; Jinqiu Liu; An Jin; Chen Feng; Yanshe Hu
- Abstract
While polymer flooding improves oilfield recovery, it also produces a large amount of polyacrylamide wastewater (PAM). Polyacrylamide wastewater has the characteristics of a high degree of emulsification, high viscosity, and difficulty degrading. The treatment of polymer-containing sewage has become a research hotspot. In this paper, based on the dielectric barrier discharge (DBD) experiment, the effect of non-equilibrium plasma on the degradation rate and viscosity of PAM solution was studied by changing the discharge time, discharge voltage, and PAM solution concentration. At the same time, the environmental scanning electron microscopy was used to observe the PAM before and after discharge. As the morphology of the solution changed, the degradation products of PAM solution after discharge were detected by Fourier-transform infrared absorption spectrometer. The results show that under the conditions of a discharge voltage of 20 kV and a frequency of 10 kHz, the degradation rate of DBD to a PAM solution with a concentration of 1,000 mg/L can reach up to 89%. DBD can cause the PAM molecular chain to curl up and reduce its viscosity rapidly. DBD is produced as the active substance first broke the PAM macromolecular chain into small molecules. Further treatment can produce acrylamide monomer and acrylic acid.
- Subjects
NONEQUILIBRIUM plasmas; POLYACRYLAMIDE; WASTEWATER treatment; INFRARED absorption; SEWAGE purification; ACRYLIC acid; SMALL molecules
- Publication
Desalination & Water Treatment, 2022, Vol 258, p143
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2022.28429