Removal of disinfection by-product precursors by Al-based coagulants: A comparative study on coagulation performance

Changes in optical properties and molecular composition of dissolved organic matter and formation of disinfection by-products during conventional water treatment processes

“…Moreover, such components with similar characteristics were well known to be THM precursors indicating the capability of the process to reduce the formation of THMs. 47,61…”

“…It was possible that different operational conditions, types of coagulants and characteristics of FDOM resulted in different removal of different portions of FDOM in the WTPs. [47][48][49] High molecular weight proteins were shown to be removed by the coagulation/flocculation process; moreover, the molecular size was shown to have an effect on the removal efficiency of protein components by the coagulation and flocculation process. 50 It was possible that the protein-like fraction in RW of MH-WTP consisted of high molecular weight molecules and they were selectively removed during the coagulation and flocculation process.…”

“…Moreover, such components with similar characteristics were well known to be THM precursors indicating the capability of the process to reduce the formation of THMs. 47,61 Rapid sand filtration of both WTPs removed substantially smaller number of components (DC and DP). Such small changes were expected in DOM in our study partly because of the limited analytical windows of Orbitrap MS (∼100-1000 Da).…”

Carbonaceous DBP (THMs and HAAs) formation during Cl2 and ClO2 treatment of aqueous soluble fractions of soil derived natural organic matter

“…The most effective approach of DBP control is to reduce the precursor before it reacts with the disinfectant. 57 Since the choice of any strategy is very site specific, similar studies involving dissolved organic matter of different geographic origins could provide better insight to prioritize engineering solutions to minimize possible accumulation of particular types of DBP precursor.…”

A critical analysis of potential formation and health risk of disinfection by products in drinking water

“…Chlorination is the most used disinfection agent (disinfectant) in the world because it effective to inactivate pathogenic microorganisms and low in price. However, the harmful compound is generated during the process and produced disinfection by-products (DBPs) because of the reactions between organic matter and chlorine [1]. DBPs has human health risk because its harmful compound in water drinking so that the water companies have to put serious attention with their occurrence in raw water sources [2].…”