Development and performance evaluation of a novel environmentally friendly adsorbent for waste water-based drilling fluids
Author:
Guo Yong1, Nie Minghu1, Wang Yingjie1, Zhong Zhen1, Liu Yunfeng2ORCID
Affiliation:
1. Engineering Technology Research Institute, PetroChina Xinjiang Oilfield Company , Karamay , Xinjiang 834000 , China 2. Research Institute of Natural Gas Technology, Southwest Oil and Gas Field Company of PetroChina , Chengdu 610213 , China
Abstract
Abstract
Adsorbent is an important waste water-based drilling fluid treatment agent, which can adsorb and settle heavy metal ions, high polymer organics, and other soluble harmful substances in the waste drilling fluid. Traditional adsorbents such as polyaluminum chloride and polyacrylamide will produce other metal ions or toxic monomers after hydrolysis, which cannot fully meet the requirements of safety and environmental protection. Therefore, a new environmentally friendly waste water-based drilling fluid adsorbent, named RH-β-CD, was prepared by the Wilson etherification reaction, which was initiated by epichlorohydrin and ceric ammonium nitrate, and successfully grafted rhamnolipid and amine strong adsorption groups onto β-cyclodextrin. The adsorption effect and environmental protection performance of RH-β-CD on the organic matter and chromium ion in waste sulfonated water-based drilling fluid were evaluated and compared with commonly used adsorbents such as activated carbon, PAM, and polyaluminum chloride. The results show that RH-β-CD can effectively adsorb the organic matter in the filtrate of waste water-based drilling fluids, reduce its chemical oxygen consumption, and reduce the concentration of heavy metal ions in the filtrate. The effect is better than PAM, activated carbon, and polyaluminum chloride, with the BOD5/CODcr >20% and EC50 >1,000,000 mg·L−1, which is environmentally friendly.
Publisher
Walter de Gruyter GmbH
Subject
Condensed Matter Physics,General Materials Science
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