Occurrence and behavior of pesticides in rainwater, roof runoff, and artificial stormwater infiltration

Article Abstract:

The adoption of artificial infiltration in treating roof runoff water is one of the widely used methods in preventing water contamination in developing countries, particularly Switzerland. However, the efficiency of artificial infiltration largely depends on the concentration level of pesticides present in roofs. During and right after the period of application, increased levels of pesticides were noted in roofs. A large amount of the runoff has also been found to settle on groundwater, specifically when they come in contact with highly permeable surfaces.

Water Supply and Irrigation Systems, Product information, Switzerland, Water Treatment, Pollutants produced & recycled

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Aqueous speciation and 1-octanol-water partitioning of tributyl- and triphenyltin: effect of pH and ion composition

Article Abstract:

The aqueous speciation of triorganotins (TOTs), particularly tributyltin (TBT) and triphenyltin (TPT), is still can not be fully explained. The 1-octanol-water partitioning values of TOTs appeared to increase when pH is increased. The partitioning of TOTs can be modeled by determining the overall distribution ratio which is the quotient of the sum of the concentrations of the different charged and neutral ions present in 1-octanol, TOT and water.

Paint and Coating Manufacturing, Paints and allied products, Paint Additives, Water pollution, Paint, Antifouling, Antifouling paints

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Sorption of organotin biocides to mineral surfaces

Article Abstract:

The sorption of triorganotin biocides (TOTs) such as tributyltin and triphenyltin from aqueous solutions to mineral surfaces becomes fast and reversible when they are sorbed especially to clay minerals and metal oxides with a net negative charge. Results have indicated that hydrogen-ion concentration or pH and the types of exchangeable cations play key roles in the sorption of TOTs and their subsequent biovailability.

Medicinal and Botanical Manufacturing, Medicinals and botanicals, Biocides, Soil absorption and adsorption, Absorption, Soil science, Bioavailability

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