Purification of Produced Water from a Sour Oilfield in South Kuwait. 2. Oil-Water Separation and Crystallization of Calcium Carbonate

作     者：Feras Al Salem Najood Almansoori Hanifa AlBalooshi Nouf Alshehhi Maitha Almheiri Vijo Poulose Thies Thiemann Feras Al Salem;Najood Almansoori;Hanifa AlBalooshi;Nouf Alshehhi;Maitha Almheiri;Vijo Poulose;Thies Thiemann

作者机构：Department of Biology United Arab Emirates University Al Ain United Arab Emirates Department of Chemistry United Arab Emirates University Al Ain United Arab Emirates 

出 版 物：《Journal of Water Resource and Protection》 (水资源与保护（英文）)

年 卷 期：2024年第16卷第7期

页      面：467-488页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

主　　题：Produced Water Oil and Gas Bleached Biomass Adsorption Filtration Crystallization of Calcium Chloride 

摘      要：Oil-water separation for produced water (PW) originating from an oil extraction site in South Kuwait was carried out using bleached, esterified cellulosic material from used coffee grounds. Thereafter, earth-alkaline metal ions, specifically calcium ions, of the de-oiled PW were removed by precipitation with sodium carbonate to give access to pure sodium chloride as industrial salt from the remaining PW. While the purity of the precipitated calcium carbonate (CaCO3) depends on the precipitation conditions, CaCO3 of up to 95.48% purity can be obtained, which makes it a salable product. The precipitation of CaCO3 decreases the amount of calcium ions in PW from 11,300 ppm to 84 ppm.