Complexation-flocculation: a new method to determine binding coefficients of organic contaminants to dissolved humic substances

Article Abstract:

Complexation-flocculation (CF) method is a new, simple and fast procedure that helps investigate the binding or complexation coefficients of organic contaminants to dissolved humic substances. The two-stage method allows the contaminant to interact with the humic material in a specified period of time then adds a coagulant such as aluminum sulfate to induce precipitation of the dissolved humic and the bound contaminant that adhered to it.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Aluminum Sulfate, Research, Pollutants, Coagulants

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Removal of phthalic acid esters from aqueous solution by inclusion and adsorption on beta-cyclodextrin

Article Abstract:

Beta-cyclodextrin (B-CDP) is effective in removing phthalic acid esters (PAEs) in aqueous solutions. The beta-CDP absorbed the PAEs both in batch and column system. Also, recovery of PAEs from the beta-CDP was done by shaking with a mixture of water and methanol, the ratio of which determined the recovery efficiency. The recovered beta-CDP can be used as an adsorbent.

Sewage Systems, Sewage Treatment Facilities, Sewerage systems, Usage, Sewer systems, Environmental aspects, Sewage, Phthalate esters, Phthalate plasticizers, Cyclodextrins, Sewage treatment

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Hydrophobic interactions between spin-label 5-SASL and humic acid as revealed by ESR spectroscopy

Article Abstract:

The spin-label probe 5-SASL (stearic acid spin-label with nitroxide free radical in position 5 of hydrocarbon chain), which is detectable by electron spin resonance, is identified as an alternative means of studying the pH dependence of hydrophobic interactions in humic acid.

Brazil, Measurement, Soil pollution, Soils, Soil chemistry, Humic acids, Soil acidity

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