Diffusion of methylene blue in glass fibers – Application of the shrinking core model

Sarkar, Debasish; Chakrabarti, Sudipta; Dutta, Binay K.

doi:10.1016/j.apm.2008.08.019

Cited by 3 publications

(1 citation statement)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Once again, EDX data also indicate the iron content of the unreacted steel wool to be 93.2 wt%, which means / C ¼ 0:932. The only adjustable parameter D of the proposed model is determined by minimizing a global objective function E(D) defined as follows (Sarkar et al 2009)…”

Section: Measurement Of Model Parametersmentioning

confidence: 99%

Commercial steel wool for reduction of hexavalent chromium in wastewater: batch kinetic studies and rate model

Mitra¹,

Banerjee²,

Sarkar³

et al. 2013

Int. J. Environ. Sci. Technol.

View full text Add to dashboard Cite

The present study aims at searching the potential of commercial grade steel wool in reducing hexavalent chromium in aqueous phase under batch mode. About 30 % of the initial hexavalent chromium was found to reduce within 2 h at a pH of 3. However, on testing the combined effects of different process parameters, namely the solution pH, wool loading, etc., the optimum batch parametric condition has been fixed. A moving boundary type kinetic model, which takes into account the effect of passivation along with the direct reduction mechanism to simulate the gross uptake profile of Cr(VI) from the bulk solution is proposed. The effective pore diffusivity of Cr(VI) in commercial steel wool was determined by a suitable global optimization technique. Additionally, the model is also capable to simulate the decline of active external surface area of the wool caused by passivation with time. A good match of the experimental data and model-simulated transient bulk concentration of Cr(VI) (under optimum parametric condition only) establishes the general validity of the proposed model.

show abstract

Section: Measurement Of Model Parametersmentioning

confidence: 99%