Total organic halogens in drinking water: a vital screening technique for suspected carcinogens in developing nations

In view of their relative simplicity and lower price, [TOX] [POX] systems offer an extremely attractive alternative for specific organohalides monitoring in developing nations where facilities and required skills are scarce. A tremendous potentiality exists in the application of the [TOX] [POX] as a scanning procedure for organo- halides in developing nations. This suggestion is based on four years of experience in monitoring organohalides using [GC] and [TOX] techniques in a USEPA certified laboratory. A scheme for [TOX] [POX] analysis was provided to improve the specificity of the system. studies on chlorinated drinking waters confirmed the fact that [POX] can be a perfect substitute to [Total THMs] analysis using purge and trap [GC] techniques. The capital cost as well as the cost of operation make the [TOX] [POX] system a very attractive alternative for poor developing nations. Major problems and solutions experienced in operating [TOX] [POX] system were given in details

Purging of trihalomethanes from water

The main objective of this investigation was to evaluate the effectiveness of reducing [THMs] using diffused-air aeration at a moderate and economically feasible air: water ratio. The results indicated that strippability of [THMs] compounds had the following order CHC1[3] > CHC1[2]Br > CHC1Br[2] >CHBr[3]. Air stripping is economically unfeasible for the removal of [THMs]. Increasing the air: water contact time by increasing the water column depth had a very minor impact on improving the stripping efficiency

Volatile organics in Egyptian drinking water: a potential problem assessment

The main objective of this study was to probe the levels of some selected volatile compounds listed by the USEPA as priority pollutants of confirmed carcinogenicity in Egyptian water supplies. Drinking water samples were collected from seven sampling sites in Cairo and then shipped to the United Stated for analysis. Standard EPA analytical techniques [601] and [602] were adopted for the analysis of these compounds using a purge and trap open tubular column gas chromatograph equipped with a flame ionization detector. The results indicate the presence of significant levels of toluene and ethylbenzene in raw Nile water. Total THMs observed were lower than the maximum USEPA allowable levels

Indexing water pollution in developing nations

Due to the lack of environmental education in developing nations, there is a fundamental necessity for the development of a simple and objective WPI. The main purpose of such an index is to convey sophisticated technicalities related to water pollution from professionals to the general public. In this paper, the authors selected and modified the ingredients of a comprehensive [WPI] and then provided a simple scheme to generate a single rating scale for water pollution. A monogram is also included to provide a fast technique for WPI