Simultaneous removal of lead, chromium and cadmium from synthetic water by electrocoagulation: Optimization through response surface methodology. (2023)

• Record Type: Journal Article
• Authors: Singh Thakur, Lokendra; Baghel, Rakhi; Sharma, Ashok; Sharma, Sarita; verma, Sanjay; Parmar, Hemant; Kumar Varma, Anil; Mondal, Prasenjit
• Is Part Of: Materials today. Volume 72(2023)Part 5
• Page Start: 2697
• Page End: 2704
• Publication Date: 2023
• Subjects: Electrocoagulation -- Lead -- Chromium -- Cadmium -- Box- Behnken design; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.09.031
• Languages: English
• ISSNs: 2214-7853

Abstract

Highlights: Simultaneous removal of lead, chromium and cadmium from synthetic water by electrocoagulation process (EC). Optimization of EC process by using of BBD model of RSM. BBD model of RSM is found the most desirable method to optimize EC process. Lead and cadmium concentration in treated water is also found below the level set by the CPCB Indian Standard for effluent. Abstract: Present research was conducted to remove lead, chromium and cadmium simultaneously from synthetic water by electrocoagulation (EC) process using iron electrodes. Process parameters such as initial pH, current density, and treatment time were optimized using Box- Behnken design (BBD) of Response Surface Methodology (RSM). A high R 2 value of Analysis of variance ensuring a satisfactory adjustment of the second-order regression model with the experimental data. Under the optimum conditions of initial pH: 5, current density: 140 A/m 2, treatment time: 40 min the removal of lead, chromium, and cadmium were obtained as 99.9 %, 94.3 %, and 99.9 %, respectively. Results confirmed the validity of the EC process optimization and the adequacy of the model. Furthermore, the lead and cadmium concentration in treated water is also found below the level set by the CPCB for Indian effluent discharge.