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Comparison of mineral acid pretreatments for sulfide removal
Author(s) -
Duranceau Steven J.,
Anderson Robert K.,
Teegarden Robert D.
Publication year - 1999
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1999.tb08637.x
Subject(s) - alkalinity , sulfuric acid , chemistry , hydrogen sulfide , carbonic acid , sulfur , sulfate , sulfide , sulfur dioxide , inorganic chemistry , environmental chemistry , organic chemistry
Both sulfuric and carbonic acid improved sulfide removal by lowering pH, but only carbonic acid preserved alkalinity and proved less corrosive. To determine water quality effects on groundwater treatment for hydrogen sulfide, the authors compared sulfuric acid (H 2 SO 4 ) and carbonic acid for pH adjustment pretreatment in a pilot‐scale (40‐gpm [2.5‐L/s]) randomly oriented packed tower. Pretreatment with either H 2 SO 4 or carbon dioxide (CO 2 ) to pH 6.0 resulted in > 95 percent sulfide removal for tower feedwater sulfide concentrations of 2.5 mg/L. However, utilization of H 2 SO 4 for pH adjustment resulted in a loss of alkalinity in the finished water and an increase in sulfur (as sulfate), whereas CO 2 pretreatment preserved alkalinity in the finished water and did not increase sulfur (as sulfate).