Combined Gamma Irradiation and Sodium Lauryl Sulphate (SLS) Surfactant Methods as Modified Activated Carbon (g-SLS/AC) for Fe2+ Wastewater Adsorbent Alvino Andreas Lumban Tobing, Sherina Massayu Putri, Angelica Isabella Christian, Sidik Permana, Asril Pramutadi, Dhita Ariyanti
Nuclear Chemical Engineering, Polytechnic Institute of Nuclear Technology, National Research and Innovation Agency, BRIN.
Department of Doctoral Nuclear Engineering, Faculty of Mathematics and Natural Sciences, Bandung Institute of Technology, Ganesha 10 Street, Bandung, 40132, Indonesia
Abstract
Heavy metal waste was one of big threat because of its negative impact on human health and environment. Heavy metals such as iron, Fe, was found in industrial wastewater, so it was necessary to reduce thus level or concentration. The use of activated carbon was one of the effective steps to carry out the sorption of Fe ions. Therefore, modification of activated carbon was carried out in this study to improve the quality of Fe2+ ion sorption on activated carbon. The methods of this research was devided on three steps. First stages was preparation of activated carbon form of sieving using a 70 mesh sieve and contacting the activated carbon with SLS surfactant for 24 hours. The second steps was exposured activated carbon modified using various dose gamma irradiation, then drying. The third steps was found out optimum contact time. Optimum contact time varied on 15, 30, 45, and 60 minutes. And the last stages was identification optimum dose irradiation. In this research, irradiation dose gamma used was 0- 10- 30- and 50 kGy. The results show that activated carbon that has been irradiated and contacted with SLS had much better sorption capacity than activated carbon it self. Capacity sorption of time contact 15 minutes was 0,8455 mg/g- 30 minutes was 0,9915 mg/g- 45 minutes was 0,9135 mg/g- and 60 minutes was 0,7305 mg/g. So, the optimum contact time was 30 minutes (0,9915 mg/g). Capacity sorption of dose gamma irradiation on 0 kGy was 0,66095 mg/g- 10 kGy was 0,86365 mg/g- 30 kGy was 0,800911 mg/g- and 50 kGy was 0,85125 mg/g. The conclusion of this research is modified activated carbon used gamma irradiation exposure and surfactant had better capacity sorption, by optimum time contact is 30 minutes (0,9915 mg/g) and 10 kGy (0,86365 mg/g) dose irradiation gamma. This research is expected to contribute to improving water quality.
