Arsenic removal in groundwater by integrated ozonation and adsorption by activated carbon and zeolite. Issue 1 (June 2019)

• Record Type: Journal Article
• Authors: Rusmana, YF; Notodarmojo, S; Helmy, Q
• Is Part Of: IOP conference series. Volume 536:Issue 1(2019)
• Publication Date: 2019-06
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/536/1/012073
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: In this study, we investigated the effectiveness of arsenic removal from groundwater with a hybrid process integrating oxidation with ozone and adsorption with activated carbon and zeolite in a 2 L volume batch reactor. Artificial ground water was used in this study, using sodium arsenite (NaAsO2 ) as an As (III) source. Artificial ground water is made to resemble natural groundwater conditions which contain 3 mg / L arsenic. The experiment shows that the arsenic adsorption efficiency in integrated ozonation-adsorption process is higher than individual adsorption process. For individual adsorption process, either with GAC or zeolite, both reached maximum removal in 2 hours. For integrated ozonation-adsorption process, adsorption efficiency reached maximum removal in 45-90 minutes. Maximum removals for individual adsorption with adsorbent dose 12.5 g/L are 69% and 55% for GAC and zeolite respectively. Maximum removal for integrated ozonation-adsorption process with adsorbent dose 12.5 g/L and ozone dose 10.1 mg/minute is 99, 97% for both cases of ozone-GAC and ozone-zeolite. Total arsenic concentration in solution reached <0.001 mg/L in 90 minutes for both cases of ozone-GAC and ozone-zeolite with adsorbent dose 10 g/L.