Open AccessOxidation of sulfide removal from petroleum refinery wastewater by using hydrogen peroxide
Author(s) -
M. C. Mamat,
A. B. Bustary,
Abdul Aziz Mohd Azoddein
Publication year - 2020
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/736/2/022103
Subject(s) - sulfide , wastewater , hydrogen peroxide , chemistry , hydrogen sulfide , oil refinery , refinery , effluent , chemical oxygen demand , environmental chemistry , nuclear chemistry , peroxide , waste management , pulp and paper industry , sulfur , organic chemistry , engineering
Petroleum refinery wastewater typically has high concentration of sulfide which is known as the most hazardous pollutants. It is released to the environment either as dissolved sulfide (S 2- and HS − ) in effluents or as H 2 S in waste gases. The objective in this study is to determine the effectiveness of hydrogen peroxide (H 2 O 2 ) in sulfide removal. The best sulfide concentration, dosage and reaction time were determined. The removal of sulfide from petroleum refinery wastewater via oxidation method by using hydrogen peroxide (H 2 O 2 ) is presented in this study. The treated wastewater was analyzed by spectrophotometer. Result shows that the best concentration of sulfide simulated wastewater (300 mg/L), H 2 O 2 dosage (1.5 ml) and reaction time (30 min) able to reduce 97.67%, 98.22% and 98.89% of sulfide concentration from simulated wastewater. Thus, sulfide removal from the actual petroleum refinery wastewater which is spent caustic by using H 2 O 2 was able to reduce 99.83% (0.5 mg/L) sulfide concentration. Besides that, Chemical Oxygen Demand (COD) concentration was reduced to 98.29% (70 mg/L) and pH 8.41 after treatment. Thus, it is concluded that oxidation method by using H 2 O 2 is effective in sulfide removal as well as COD, and pH from spent caustic. It does meet requirement from Department of Environment (DOE) for sulfide, COD and pH which are 0.5 mg/L, 100 mg/L and 5.5 – 9.0, respectively. The information obtained from this study is useful for scale up purpose in the petroleum refining industry that choose H 2 O 2 via oxidation method to remove sulfide from spent caustic wastewater.