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The influence of sodium dodecyl sulfate adsorption capacity - activated carbon species foreword

Time:2015/11/4 5:58:22

Abstract: by using methylene blue spectrophotometric method determination of typical commercial coal and wood activated carbon to the solution of sodium dodecyl sulfate (SDS) in liquid phase adsorption isotherm, determine the activated carbon of sodium dodecyl sulfate (SDS) adsorption capacity; Using gas adsorption instrument of the activated carbon pore structure and specific surface area, and tested the samples of activated carbon iodine number and methylene blue value; The last link activated carbon adsorption performance index, specific surface area and sodium dodecyl sulfate (SDS) the relationship between the adsorption capacity. The results show that the long-flame coal, anthracite, lignite and the preparation of 4 kinds of activated carbon coconut shell as raw material for sodium dodecyl sulfate (SDS), the adsorption capacity of 390 mg/g, respectively 410 mg/g, 434 mg/g and 459 mg/g; Activated carbon adsorption capacity of SDS and no obvious correlation between specific surface area activated carbon, but with the iodine number and methylene blue value increases, it can be used for removing plating solution of sodium dodecyl sulfate (SDS) of the choice basis of activated carbon.
Key words: activated carbon; Sodium dodecyl sulfate; Adsorption isotherm. Plating solution
Chinese library classification number: TQ153 literature identifier: A article number: 1000-4742 (2011) 03-0037-04
preface
Sodium dodecyl sulfate (SDS) is a kind of typical anionic surface active agent, the specific wetting power and good biodegradability in the electroplating industry commonly used as wetting agents, in order to enhance the dispersion of metal ions, reduce the liquid - solid, the surface tension of the gas-solid interface, avoid pinhole cathode hydrogen stay to improve the product surface smoothness and brightness, improve plating effect. Circulation in the plating solution, however, the remnants of sodium dodecyl sulfate (SDS) can reduce the product quality, equipment loss and waste liquid of sodium dodecyl sulfate (SDS) on water environment, soil structure and the human health hazard.
At present, the method of removing surfactant with coagulation sedimentation method, foam separation, membrane separation, adsorption separation, catalytic oxidation, micro electrolysis and biological oxidation, etc. To large amount of adsorption of activated carbon as adsorbent adsorption separation, simple process, lower cost, is the more economical and practical method. However, there are many different kinds of activated carbon and performance with the raw material types, preparation, modification methods such as difference is very big. So far, about the types of activated carbon and sodium dodecyl sulfate (SDS) adsorption capacity and in-depth research is not system.
This article selects four kinds of typical commercial activated carbon for sample goods, were determined for the sodium dodecyl sulfate (SDS) adsorption isotherm, specific surface area activated carbon, associated adsorption performance with sodium dodecyl sulfate (SDS), the relationship between adsorption capacity, expectations for removing plating solution of sodium dodecyl sulfate (SDS) to provide evidence for the selection of the activated carbon.