Open AccessArsenic removal in groundwater by integrated ozonation and adsorption by activated carbon and zeolite
Author(s) -
YF Rusmana,
Suprihanto Notodarmojo,
Qomarudin Helmy
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/536/1/012073
Subject(s) - adsorption , zeolite , ozone , arsenic , chemistry , activated carbon , groundwater , human decontamination , environmental chemistry , nuclear chemistry , arsenite , environmental engineering , inorganic chemistry , waste management , catalysis , organic chemistry , environmental science , geology , geotechnical engineering , engineering
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 (NaAsO 2 ) 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.