title: The mechanism of hydrogen sulfide adsorption on fine rubber particle media (FRPM).
abstract: A commercial rubber waste product, fine rubber particle media (FRPM), was found to adsorb hydrogen sulfide (H₂S) at 0.12 mg H₂S/g FRPM of adsorption capacity. Since FRPM seems to be an attractive alternative to treat H₂S owing to its economic advantages as well as its physicochemical characteristics, several analyses were conducted to investigate fundamental information, surface properties, and breakthrough characteristics of FRPM as adsorbent. The physical properties of FRPM including composition and surface chemistry were investigated to compare its performance with commonly available commercial H₂S adsorbents such as activated carbon and assess the possible adsorption mechanism. The specific surface area of FRPM was less than 1% of activated carbon. FRPM does not have enough surface area supporting a pure physical adsorption of H₂S because it is particulate in nature with limited porosity. The adsorption of FRPM to remove H₂S was complex mechanism and involved a combination of zinc compounds and carbon black.
authors.affiliation: Department of Civil, Construction, and Environmental Engineering, Iowa State University, Ames, IA 50011, USA.
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
authors.forename: Jaeyoung
authors.initials: J
authors.lastname: Park
authors.forename: Timothy G
authors.initials: TG
authors.lastname: Ellis
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000032:analysis* / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D003300:Copper / Q000737:chemistry; D004867:Equipment Design; D006862:Hydrogen Sulfide / Q000737:chemistry*; D009812:Odorants; D052638:Particulate Matter; D016062:Porosity; D012408:Rubber / Q000737:chemistry*; D012722:Sewage; D013229:Stearic Acids / Q000737:chemistry; D013499:Surface Properties; D013696:Temperature; D013818:Thermogravimetry; D013997:Time Factors; D014865:Waste Disposal, Fluid / Q000379:methods*; D015032:Zinc / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D052638:Particulate Matter; D012722:Sewage; D013229:Stearic Acids; C031183:stearic acid; D002244:Carbon; D003300:Copper; D012408:Rubber; D015032:Zinc; D006862:Hydrogen Sulfide
keywords: Adsorption capacity; Fine rubber particle media (FRPM); Hydrogen sulfide; Zinc