Back to Search
Start Over
Sulfide recovery using fluidized bed homogeneous crystallization technology to produce nickel sulfide from wastewater that contains sulfides.
- Source :
-
Environmental Research . Nov2023:Part 1, Vol. 236, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Sulfide-containing wastewater, characterized by its foul odor, corrosiveness, and toxicity, can endanger human health. Fluidized-bed homogeneous crystallization (FBHC) avoids the excessive sludge production commonly associated with conventional chemical precipitation methods. In this study, FBHC is used to treat sulfur-containing synthetic wastewater. Furthermore, nickel-containing wastewater was utilized as a precipitant in the system, hence the advantage of simultaneous sulfur and nickel removal from the wastewater. The operating parameters, including pH, a precipitant dosage of [Ni2+] 0 /[S2−] 0 , and cross-sectional surface loading (L S , kg/m2h) are optimized. The optimum operating conditions of pH 9.8 ± 0.3, [Ni2+] 0 /[S2−] 0 = 0.8, and L S = 1.5 kg/m2h results in total sulfur removal (TR) of 95.7% and crystallization ratio (CR) of 94.8%. The effect of organic compounds (acetic acid, oxalic acid, EDTA, and citric acid) and inorganic ions (NO 3 −, CO 3 2−, PO 4 3−, F−, and Cl−) on the nickel sulfide granulation process was discussed. [Display omitted] • Sulfide wastewater could be treated by FBHC. • The total sulfur removal achieves 95.7%. • The waste cost is 86.0% lower than chemical precipitation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00139351
- Volume :
- 236
- Database :
- Academic Search Index
- Journal :
- Environmental Research
- Publication Type :
- Academic Journal
- Accession number :
- 172810577
- Full Text :
- https://doi.org/10.1016/j.envres.2023.116782