Unmodified versus Caustics-Impregnated Carbons for Control of Hydrogen Sulfide Emissions from Sewage Treatment Plants

Article Abstract:

Unmodified and caustic-impregnated carbons were compared for their adsorption potential and practical use. Test results showed that unmodified carbon was a superior material at low hydrogen sulfide concentrations which are normal at treatment plants. Caustic-impregnated carbons also acquire sulfur and become exhausted. The test methods included hydrogen sulfide breakthrough capacity tests, sorption of nitrogen, potentiometric titration and thermal analysis. Porosity and surface chemistry are the key factors in the superior performance of unmodified carbon, however optimization requires more study.

All Other Basic Inorganic Chemical Manufacturing, Pollutants produced & recycled, Activated Carbon, Industrial inorganic chemicals, not elsewhere classified, Statistical Data Included, Management, Water treatment plants, Bandosz, Teresa J., Bagreev, Andrey, Adib, Foad, Turk, Amos, City University of New York

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Watershed vulnerability to losses of agricultural chemicals: interactions of chemistry, hydrology, and land-use

Article Abstract:

Researchers from Columbia, MO conducted a survey to determine the vulnerability of streams to agricultural chemicals in northern Missouri.

Chemicals & Allied Products, Chemical Manufacturing, CHEMICALS AND ALLIED PRODUCTS, Chemicals

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Reinvestigation of the acetone degradation mechanism in dilute aqueous solution by the UV/H2O2 process

Article Abstract:

The authors of this study provide additional data which expands upon their previous study discussing the degradation of acetone, and resulting intermediate chemicals within an aqueous solution. The authors also created a kinetic model to more accurately predict levels of these compounds. The mathematical model and test data compared favorably. This model replaces previous models that did not accurately predict levels of pyruvic aldehyde, hydroxyacetone, and pyruvic acid during the degradation process. The model should be helpful when dealing with groundwater contaminated with acetone.

All Other Basic Organic Chemical Manufacturing, Industrial organic chemicals, not elsewhere classified, Acetone

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