Monitoring natural and synthetic estrogens at activated sludge sewage treatment plants and in a receiving river water

Article Abstract:

This study examined whether or not activated sludge sewage treatment plants are able to produce significant amounts of free estrogens. Monthly estriol, estradiol, estrone, and ethinylestradiol in influents and effluents were studied for a period of five months. The article is broken down into an introduction, a discussion of the experiment, and a discussion of the results.

United States, Sewage Systems, Sewage Treatment Facilities, Pollutants produced & recycled, Sewerage systems, Sewage disposal plants, Sewer systems, Pollution control industry, Pollution

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Development of a multiresidue method for analyzing pesticide traces in water based on solid-phase extraction and electrospray liquid chromatography mass spectrometry

Article Abstract:

A study aimed at developing a multiresidue (MR) method to determine the pesticide residues in drinking water, groundwater, and surface water is presented. The experiment utilized solid-phase (SPE) extraction through graphitized carbon black (Carbograph 4) followed by liquid chromatography electrospray mass spectrometry (LC/ES/MS) in analyzing 45 commonly used pesticides. The results of the experiments indicate that the combination of a Carbograph 4 SPE cartridge with LC/ES/MS can ideally be used for fast, clear, and accurate determination of pesticide traces in aqueous matrices.

Measuring & controlling devices, not elsewhere classified, Other Measuring and Controlling Device Manufacturing, Water Treatment Analyzers, Methods, Analysis, Water treatment equipment, Water pollution testing equipment, Liquid chromatography, Mass spectrometry, Water analysis, Trace pollutants, Water quality bioassay

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Ultratrace determination of atrazine and its six major degradation products in water by solid-phase extraction and liquid chromatography-electrospray/mass spectrometry

Article Abstract:

The use of solid-phase extraction and electrospray liquid chromatography-mass spectrometry techniques can help determine trace amounts of the herbicide atrazine and its six degradation products in groundwater, drinking water and surface water. The method is able to detect the presence of these compounds in river samples at levels down to 40-300 nanograms per liter.

Research and Development in the Physical, Engineering, and Life Sciences, Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Pollution Control R&D, Herbicides, Pollution control research, Chemical detectors, Atrazine

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