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Chlorine Decay in Auckland's Distribution System
WRPMD'99, 1999The first step in finding a cure for water quality deterioration in water distribution systems is to study how water quality varies within the distribution system and the causes and effects of this variation. This paper discusses a pilot study aimed at assessing the propagation and concentration of chlorine in a water distribution network and ...
Bassam Halabi +2 more
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Modeling of Chlorine Disinfectant Decay in Seawater
Journal of the Korean Society of Water and Wastewater, 2016Disinfectant/oxidation process is a crucial process in water treatment for supplying safe drinking water. Chlorination is still widely used for water treatment area due to its effectiveness on microbial inactivation and economic feasibility. Recently, disinfection concern in marine environment is increasing, for example, movement of hazardous marine ...
Jihee Han, Jinsik Sohn
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Chlorine Decay KINETICS of a Reservoir Water
Journal AWWA, 2001Massachusetts Water Resources Authority started adding sodium hypochlorite to its raw water (Wachusett Reservoir) in September 1997 to achieve compliance with the requirements of the Surface Water Treatment Rule for unfiltered surface water supplies, mainly the 3‐log C × T (concentration times time) value for Giardia inactivation.
Windsor Sung +3 more
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Decay of chlorine in diluted municipal effluents
Canadian Journal of Civil Engineering, 1988Laboratory studies were conducted to develop a model for the overall decay of total residual chlorine (TRC) under various conditions in the natural streams. This model assumes that a portion of the initial chlorine concentration is used to satisfy the immediate chlorine demand and the remainder is subject to gradual decay.The important parameters ...
Shaden T. Abdel-Gawad +1 more
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Relationship of chlorine decay and THMs formation to NOM size
Journal of Hazardous Materials, 2003Because of increasing concern about balancing health risks for pathogen control and disinfection by-product (DBP) formation in water supplies, utilities are forced to closely examine and optimize their disinfection practices. A better understanding of the relationship between the molecular weights of the natural organic matter (NOM), chlorine decay ...
Dianchen, Gang +2 more
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Chemosphere, 2017
This paper presents the effect of preoxidation with ferrate(VI) (FeVIO42-, Fe(VI)) prior to chlorination on chlorine decay and formation of disinfection by-products in filtered raw water from a full-scale drinking water treatment plant. The rate of chlorine decay became significantly faster as the concentration of ferrate(VI) increased.
Cong Li +7 more
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This paper presents the effect of preoxidation with ferrate(VI) (FeVIO42-, Fe(VI)) prior to chlorination on chlorine decay and formation of disinfection by-products in filtered raw water from a full-scale drinking water treatment plant. The rate of chlorine decay became significantly faster as the concentration of ferrate(VI) increased.
Cong Li +7 more
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Modeling and verifying chlorine decay and chloroacetic acid formation in drinking water chlorination
Frontiers of Environmental Science & Engineering in China, 2009This study presents a phenomenological model that can be used by the water professionals to quantify chlorine decay and disinfection byproduct (DBP) formation in water. The kinetic model was developed by introducing the concept of limiting chlorine demand and extending an established reactive species approach.
Wenjun Liu, Shaoying Qi
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Science of The Total Environment, 2022
Booster chlorination was usually employed in water distribution systems with a long hydraulic retention time. The free chlorine decay and disinfection by-products (DBPs) transformation under booster chlorination conditions were investigated within a pilot-scale water distribution system (WDS). Compared with the initial chlorination in water plants, the
Pubin, Liao +4 more
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Booster chlorination was usually employed in water distribution systems with a long hydraulic retention time. The free chlorine decay and disinfection by-products (DBPs) transformation under booster chlorination conditions were investigated within a pilot-scale water distribution system (WDS). Compared with the initial chlorination in water plants, the
Pubin, Liao +4 more
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CXLIV. K-capture in the decay of chlorine 36
The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1955A search for the existence of K-capture in ^(36)C1 has been made using a proportional tube spectrometer with labelled methyl chloride as a gaseous source. A peak which was observed in the beta spectrum corresponded to the K-radiation of sulphur and indicated the presence of K-capture. The branching ratio K/β^- was found to be (l·7±0·1)%.
Drever, R. W. P., Moljk, A.
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Performance of Various Kinetic Models for Chlorine Decay
Journal of Water Resources Planning and Management, 2001A number of computer packages have been developed for modeling chlorine decay in water distribution networks. However, there is uncertainty as to the kinetic model that they should use for the decay mechanism. This paper explores the performance of six different kinetic models for the decay of free chlorine in over 200 bulk water samples from a number ...
Geeta Arora +7 more
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