Establishing and controlling dissolved concentrations of hydrophobic organics by partitioning from a solid phase

Article Abstract:

Partitioning driven administration (PDA) is introduced to maintain constant exposure levels of hydrophobic organics in aqueous tests. The practical principle of PDA is to control dissolved concentrations by partitioning from a dominating solid phase. Test compounds are loaded on an octadecyl Empore disk, which subsequently is placed in an aqueous test system. PDA was successfully used for dose 1,3,5- tribromobenzene and hexachlorobenzene in algal toxicity tests.

Netherlands, All Other Basic Inorganic Chemical Manufacturing, Petrochemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Benzene, Bromine Compounds, Hexachlorobutadiene, Chlorocarbons

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X-ray absorption spectroscopic evidence for the complexation of Hg (II) by reduced sulfur in soil humic substances

Article Abstract:

The importance of reduced sulfur functional groups (thiol (R-SH) and disulfide (R-SS-R)/disulfane (R-SSH)) in humic substances in the complexation of Hg(II) was discovered by analysis of Hg(II) complexed by a soil humic acid (HA) using synchrotron-based X-ray absorption spectroscopy (XAS).

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), CHEMICALS AND ALLIED PRODUCTS, Mercury, Organosulfur Compounds, Organomercury Compounds, Pollution, Mercury (Metal), Organometallic compounds, Organic sulfur compounds, Mercury industry, Mercury compounds

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Binding of polychlorinated biphenyls to aquatic humic substances: the role of substrate and sorbate properties on partitioning

Article Abstract:

The effects of sorbate structure in binding processes to two lacustrine fulvic acids were studied utilizing two ortho-(2,2',5 and 2,2',5,6') and a non-ortho-(3,3',4,4') substituted polychlorinated biphenyl (PCB).

Sorbic Acid, Schools, University of Colorado, Boulder, Colorado

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