Modeling the Oxidation of Sulfide in Pulp and Paper Wastewaters

Palumbo, James E.; Brown, Linfield C.; Stratton, Stephen C.

doi:10.1061/(asce)ee.1943-7870.0000248

Cited by 5 publications

(2 citation statements)

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“…S 0 , S 2 O 3 2À , SO 3 2À , SO 4 2À [14]. As the oxidation of sulphide using air or oxygen over NaOCl and H 2 O 2 offers an alternative as well as an inexpensive means of treating wastewaters, the sulphide kinetics was conducted using O 2 from air and Fe 3+ as a catalyst at 293 K. The progress of the reaction was noted by measuring the reduction in the sulphide concentration with time.…”

Section: Oxidation Kinetics Of Sulphide Removalmentioning

confidence: 99%

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Sulphide removal from petroleum refinery wastewaters by catalytic oxidation

Santo

Vilar

Bhatnagar

et al. 2012

Desalination and Water Treatment

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A B S T R A C TThe catalytic oxidation of sulphides present in oil refinery wastewaters was investigated in the present study. The wastewaters were obtained from the wastewater treatment plant of the oil refinery in Matosinhos (Portugal), Galp Energia. Air, NaOCl and H 2 O 2 were chosen as oxidants and Fe 3+ and Mn 2+ as the two catalysts to assess the effective combination of catalyst-oxidant for sulphide removal after oil separation in parallel plate interceptors. Primarily, air (oxygen) was used as the oxidant and the efficiency of two catalysts (Fe 3+ and Mn 2+ ) for sulphide removal was evaluated. Experimental data suggested that Fe 3+ catalysed sulphide removal in the presence of oxygen was more effective than Mn 2+ catalysed reaction. In a subsequent study, oxygen was replaced by NaOCl and H 2 O 2 , and the potential of various catalyst-oxidant combinations, NaOCl + [Fe 3+ ], NaOCl + [Mn 2+ ], H 2 O 2 + [Fe 3+ ], H 2 O 2 + [Mn 2+ ], was assessed. The NaOCl + [Fe 3+ ] combination achieved the maximum sulphide oxidation.Pseudo-first-order and pseudo-second-order reaction models were fitted to the kinetic experimental data. The influence of temperature on the kinetic rate was also investigated.

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Section: Oxidation Kinetics Of Sulphide Removalmentioning

confidence: 99%

“…Chemical reaction of sulphides with dissolved oxygen yields a number of products including hyposulphite (S 2 O 3 2À ), sulphate (SO 4 2À ), sulphite (SO 3 2À ) or sulphur as given in Eqs. (1)-(4) [14], but the process is slow and complex [15,16].…”

Section: Introductionmentioning

confidence: 99%