This population-based case-control study was conducted in southern Ontario, Canada from 1992 to 1994 to assess the relationship between chlorination by-products in public water supplies and cancers of the colon and rectum. Interviews providing residence and water source histories were completed by 76% of eligible cancer cases and 72% of eligible controls. Supplemental data from municipal water ...

Disinfection is mandatory for swimming pools: public pools are usually disinfected by gaseous chlorine or sodium hypochlorite and cartridge filters; home pools typically use stabilized chlorine. These methods produce a variety of disinfection byproducts (DBPs), such as trihalomethanes (THMs), which are regulated carcinogenic DBPs in drinking water that have been detected in the blood and breath...

A headspace-solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS) method has been developed for the simultaneously determination of 20 disinfection by-products (DBPs) in water samples from reverse osmosis (RO) membranes. Selected compounds belong to different families including: trihalomethanes (THMs), halogenated acetonitriles (HANs), halogenated nitromethanes ...

This research involved an investigation of the application and reaction mechanisms of UV/H2O2 for the simultaneous removal of regulated halogenated disinfection byproducts (DBPs) and odorous aldehydic algal byproducts in the presence of geosmin and 2methylisoborneol, which are earthy-musty odorants that commonly occur in drinking water. UV/H2O2 is an expensive advanced oxidation process that is...

I want increased confidence in my programs. I want my own and other people’s programs to be more readable. I want a new discipline of programming that augments my thought processes. Therefore, I create and explore a new discipline of programming in my BabyUML laboratory. I select, simplify and twist UML and other languages to demonstrate how they help bridge the gap between me as a programmer a...

The disinfection by-product (DBP) formation was affected by the dissolved organic matter (DOM). Therefore, DOM properties and DBP potential of two most widely used source waters: groundwater (GW) surface water (SW), were comparatively studied in this work. results suggested that GW mainly consisted protein-like organics with smaller molecular weight (Mw) less than 3000 Da, while SW contained hu...