الفهرس 
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Abstract
Follow up and removal of some chlorinated disinfection by-products from different water plants in El-Fayoum city by using green sorbent
Degree: M. Sc. Unpublished master of Science thesis, Faculty of science-Fayoum University, 2015.
Monitoring and modeling of the concentrations of
trihalomethanes (THMs) within four water treatment plants (WTPs)
and distribution lines in Fayoum City, Egypt, and using Poly
urethane foam (PUF) as green sorbent for reduction of THMs on
tap water were studied. Sampling sites for raw and treated waters
were determined by global positioning system and the Arc
geographic information system software was used for mapping.
THMs were monitored using 25 sampling points located at the
plant exit and through the distribution lines up to the plant
extremity. Results indicated that the THMs concentration varied
significantly but it was very rarely higher than the allowed
maximum contaminant level of 100μg/L. However, at the dead
zones in the distribution lines, the THMs increased by about 160%
compared to in-plant level. Furthermore, the level of THMs in hot
months was about 1.3 times higher than in cold ones.
The influence of some independent variables such as temperature, pH, ammonia concentration, total organic carbon and color were investigated by Pearson model to find their correlation with the rate of THMs formation in WTPs. The resulted R values ranged from 0.81 to 0.98. Successful application of the model to a selected region on the distribution lines has resulted in a correlation coefficient of 0.98.
On the other hand by using PUF as green sorbent for removing THMs the results shown that its efficiency increase by: increasing
the sorbent weight till 87.8% with 20g sorbent/L sample, and by
decreasing the flow rate of water where, the removal of TTHM
increased till 82% at flow rate 2.5 mL/min. And the Breakthrough
capacity of PUF was 7.92μg TTHM removed/g sorbent with
sample flow rate 25 mL/min.
UKeywordsU: trihalomethanes; water treatment plants; distribution
lines; monitoring; modeling; polyurethane foam; B