Comparison Of Mineral Acid Pretreatments For Sulfide Removal

• Main Authors: Duranceau, Steven J., Anderson, Robert K., Teegarden, Robert D.
• Format: Text
• Language: unknown
• Published: STARS 1999
• Subjects: Carbonic acid
• Online Access: https://stars.library.ucf.edu/scopus1990/3977

To determine water quality effects on groundwater treatment for hydrogen sulfide, the authors compared sulfuric acid (H2SO4) and carbonic acid for pH adjustment pretreatment in a pilot-scale (40-gpm [2.5-L/s]) randomly oriented packed tower. Pretreatment with either H2SO4 or carbon dioxide (CO2) to pH 6.0 resulted in >95 percent sulfide removal for tower feedwater sulfide concentrations of 2.5 mg/L. However, utilization of H2SO4 for pH adjustment resulted in a loss of alkalinity in the finished water and an increase in sulfur (as sulfate), whereas CO2 pretreatment preserved alkalinity in the finished water and did not increase sulfur (as sulfate).