2013/03/01 by Vikas K. Sangal, Vikas Kumar Sangal, I. M. Mishra +3 · 51 citations
Chemistry · Engineering · Environmental Science · #Advanced oxidation water treatment #Analytical Chemistry (journal) #Aqueous solution #Chemistry #Chromatography #Electrocoagulation #Emulsion #Environmental engineering #Membrane Separation Technologies #Membrane-based Ion Separation Techniques #Organic chemistry #Pulp and paper industry #Turbidity #Wastewater
paper · doi:10.1080/01496395.2012.719985
published in Separation Science and Technology 48(7), 1062-1072 (Taylor & Francis)
crossref issued 2013/03/01 · crossref published 2013/03/01 · crossref published-print 2013/03/01 · openalex publication_date 2013/03/01 · crossref created 2013/03/27 · crossref deposited 2017/06/21 · openalex created_date 2025/10/10 · crossref indexed 2026/08/03 · openalex updated_date 2026/08/04
Soluble oils (cutting oils) in aqueous solution are used extensively in the engineering and metal working industries, as coolants, metal forming fluids, and/or lubricants. Hysol-X is a general-purpose cutting oil used in 1–10% concentration in aqueous solution. This paper investigates demulsification of soluble-oil-water emulsion using electrocoagulation with aluminum electrodes. It examines the current efficiency and the pH variation of the system due to electrocoagulation and the effect of pH of the oil-water emulsion, current density, and temperature on the demulsification process. A simple first order kinetics fits the experimental data at a constant value of current density. The optimum pH and current density were found to be 6.50 and 138.8 A/m2, respectively. Apparent electrode current efficiency was found to be 115.5%. Temperature has significant effect on emulsion stability and solution pH. At a lower temperature of 20°C or a higher temperature of 60°C, the turbidity (or oil) removal is found to be very high. More than 99% oil separation is achieved in 3 h at 20°C. The residual aluminum concentration in the treated water at an initial pH 6.5 is found to be 0.001 mg/l, well below the statutory discharge standard value.