Factors influencing photoreactions of dissolved organic matter in a coastal river of the Southeastern United States

Article Abstract:

Iron compounds tend to induce the photoformation of carbon monoxide (CO) and dissolved inorganic carbon (DIC) in surface waters, as revealed by statistics gathered from the Satilla River. It was further established that enhancing the dioxygen content of water bodies and lowering their pH level may expedite the photoreaction of colored dissolved organic matter (CDOM). CDOM photoreaction was also shown to facilitate the conversion of iron and carbon compounds to particulate form, thereby enhancing the transport of these compounds to well-stratified aquatic ecosystems.

All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Iron Compounds NEC, Environmental aspects, Carbon, Iron, Iron (Metal), Iron compounds

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Effects of sublethal exposure on lethal body burdens of narcotic organic chemicals in Daphnia magna

Article Abstract:

The effect of sublethal exposure to 10 different narcotic organic chemicals on the effective body burdens of Daphnia magna was investigated. The results showed that 24-hour prior exposure to all the sample chemicals, except for butanol and benzoic acid, had no effect on their sensitivity to effective levels of the chemicals. The results suggest that animals in polluted sites are no more resistant to pollutant residues than their counterparts residing in clean sites.

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Estimating sorption rates of hydrophobic organic compounds in iron oxide- and aluminosilicate clay-coated aquifer sands

Article Abstract:

Sandy aquifers, which are important sources of groundwater, may be exposed to anthropogenic contamination. Cost-effective remediation of such contaminated water resources requires an understanding of the kinetic processes in the contamination by hydrophobic organic compounds (HOCs) of the aquifers. The research examined the retarded diffusion in the coatings, which may control the sorption rate of HOCs, of three quartzitic aquifer sands.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution Control R&D, Water quality management, Contamination, Aquifers, Water pollution research

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