Adsorbable organic halogen compounds

Advisory Committee on Business and the Environment American Chemistry Council Association of Chartered Certified Accountants adsorbable organic halogen compounds (X = any halogen that can be identified by standardised analytical methods)... 

The content of "adsorbable organic halogen compounds (AOX)" is calculated in "pg/litfe AOX" and quoted as a chloride concentration ... 

AOX adsorbable organic halogen compounds. The total concentration in milligrams per litre, expressed as chlorine, of all halogen compounds (except fluorine) present in a sample of water that are capable of being adsorbed on activated carbon... 

This practice is still common. For example, the adsorbable organic halogen compounds are lumped under the AOX combined variables. These types of compound, which are not found in nature, comes primarily from the cellulose industry. Little is known about the individual components, and almost nothing about their interaction. 

Many recent reports on the radiolysis of organic halogen compounds have involved studies of solid state or very low temperature systems (refs. 745, 781, 787, 858, 867, 906, and the use of pulsed techniques - - - - - - . Studies on species adsorbed on silica gel have also been made. The nature of intermediate species and the mechanism of scavenger action have been discussed by a number of investigators (see, for example, references 749, 906, 974, 981). 

Transportable equipment for measuring adsorb-able organic halogen compounds (AOX), chemical oxygen demand (COD), total organic carbon (TOC)... 

Frequently, halogenated hydrocarbons in environmental matrices are quantified, in bulk, by a standard analytical procedure for adsorbable organic halogens (AOX). Originally conceived to monitor the formation of chlorinated organic compounds in drinking water, the data derived from environmental characterization have been interpreted as an indicator of anthropogenic... 

Higher starting material purities are being achieved by the use of guard catalysts that remove catalyst poisons such as sulfur and halogen compounds, metals, and organic impurities. Here the zeolites have advantages over conventional adsorbents such as activated carbons [8]. 

Rey et al. ° removed chlorinated aromatic hydrocarbon from a pharmaceutical plant by stripping the chlorinated hydrocarbons with air and then adsorbing in activated carbon beds. The removal of chlorinated volatile organic compounds such as trichloroethane, cis, and trans dichloroethane from ground water contaminated with these nonaqueous liquids was carried out by Yu et al." using activated carbon fibers. All the halogenated compounds were adsorbed rapidly by the activated carbon... 

In the Mitsubishi organic halogen measurement system, chloro and bromo compounds in the environment (air, water) are adsorbed in columns tilled with activated carbon and then heated at 900°C in a horizontal combustion tube in an oxygen atmosphere. The hydrogen chloride and hydrogen bromide produeed are introduced into the automatic titration cell and determined coulometrically with silver ions. 

Gron [23] has reviewed methods for the determination of halogenated organic compounds (adsorbable, volatile and extractable), with particular reference to their applicability to wastewaters and marine samples (marine sediments and marine organisms). Typical analytical results for marine... 

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