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Heterogeneous degradation of oil field additives by Cu ( II ) complex‐activated persulfate oxidation
Author(s) -
Tang Ying,
Zhou Ling,
Xu Zhongying,
Zhang Jie,
Qu Chengtuan,
Zhang Zhifang
Publication year - 2020
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.13562
Subject(s) - catalysis , chemistry , persulfate , degradation (telecommunications) , nuclear chemistry , bentonite , copper , chemical engineering , organic chemistry , telecommunications , computer science , engineering
In this work, bentonite‐supported Cu(II) complex (B@Cu(II)L) was prepared by a one‐pot method and used as a heterogeneous catalyst for evaluating its catalytic activity in oxidation degradation of hydroxypropyl guar gum (HPGG) in oilfield wastewater. All of the reaction parameters effected degradation efficiency, such as Na 2 S 2 O 8 concentration, catalyst amount, reaction temperature, and pH value, were investigated in detail. The results showed that the absolute viscosity of HPGG solution can be decreased from 15 to 1.48 mm 2 /s in presence of 15% Na 2 S 2 O 8 (mass ratio to HPGG) and 1.5 g/L B@Cu(II)L at 45°C and pH = 10. It was also found that the chemical oxygen demand of HPGG solution catalyzed by B@Cu(II)L decreased from 4,080 to 584 mg/L after 240 min under the optimum experimental conditions. The catalytic activity of supported bivalent copper complexes over bentonite was gradually decreased due to the loss of the active copper.