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Advanced Science, EarlyView.A covalently integrated single‐component photocatalyst is constructed by anchoring selenoviologen to platinum nanoparticles via robust N‐heterocyclic carbene ligands. The resulting Pt─C covalent bonds function dually as protective structural scaffolds and direct channels for ultrafast intramolecular electron transfer This precise interfacial ...
Wenxi He +8 more
wiley +1 more source
A Variable Rate Coefficient Chlorine Decay Model
Environmental Science & Technology, 2008 Chlorine is the most widely used water disinfectant in the world. As a result, optimal chlorine usage is essential for both human and environmental health. Chlorine decay models can be used to predict residual concentrations in water distribution networks and optimize chlorine dosing. However, the coefficients of current chlorine decay models are often
Jonkergouw, PM +5 more
core +6 more sources
Simulation of Chlorine Decay in Drinking-Water Distribution Systems
Journal of Environmental Engineering, 2002 This work presents a model that evaluates the decay of the chlorine concentration in drinking water distribution networks. The model may use either Lagrangian based time driven or event driven methods depending on the hydraulic characteristic of the pipes. The decay of the chlorine within a pipe is evaluated by using a single equation that incorporates
Ucak, A, ÖZDEMİR, OSMAN NURİ
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A new approximate solution for chlorine concentration decay in pipes
Water Research, 2008 Biswas et al. (1993. A model for chlorine concentration decay in pipes. Water Res. 27(12), 1715-1724) presented an analytical solution of a two-dimensional (2-D) steady-state chlorine transport equation in a pipe under the turbulent condition and employed fractional error function and regression technique to develop an approximate solution.
Hund-Der, Yeh +3 more
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Chemical Engineering Journal, 2019
Abstract In order to guarantee the water quality of reclaimed water in pipeline system, a chlorine bulk-decay model is required for simulation and prediction of chlorine profiles in networks. Conventional chlorine decay models of drinking water are not applicable to reclaimed water due to its complex and varying water quality.
Zhuo Chen, Ye Du, Hong-Ying Hu
exaly +2 more sources
Abstract In order to guarantee the water quality of reclaimed water in pipeline system, a chlorine bulk-decay model is required for simulation and prediction of chlorine profiles in networks. Conventional chlorine decay models of drinking water are not applicable to reclaimed water due to its complex and varying water quality.
Zhuo Chen, Ye Du, Hong-Ying Hu
exaly +2 more sources
Modelling chlorine residual decay as influenced by temperature
Water and Environment Journal, 2015AbstractTemperature is one of the most important factors affecting chlorine decay rates in drinking water systems. In this article, temperature effect on chlorine decay rates in raw and treated waters was studied. Results show that temperature affects differently the fast and slow decay phases, the latter being more sensitive to temperature variations,
Monteiro L +2 more
exaly +2 more sources
The decay of chlorine associated with the pipe wall in water distribution systems
Water Research, 2002Free chlorine decay rates in water distribution systems for bulk and wall demands should be modelled separately as they have different functional dependencies. Few good quality determinations of in situ wall demand have been made due to the difficulty of monitoring live systems and due to their complexity.
J R West, C F Förster, J R West
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Journal AWWA, 1997
Models of chlorine kinetics in distribution systems characterize chlorine decay as a combination of first‐order decay in the bulk liquid and first‐order or zero‐order decay reactions at the pipe wall.Proper understanding, characterization, and prediction of water quality behavior in drinking water distribution systems are critical to ensure meeting ...
John J. Vasconcelos +4 more
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Models of chlorine kinetics in distribution systems characterize chlorine decay as a combination of first‐order decay in the bulk liquid and first‐order or zero‐order decay reactions at the pipe wall.Proper understanding, characterization, and prediction of water quality behavior in drinking water distribution systems are critical to ensure meeting ...
John J. Vasconcelos +4 more
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The decay of chlorine-36 to sulphur-36
Philosophical Magazine, 1962A study has been made of the decay branches of chlorine-36 which lead to sulphur-36.The ratio of L-capture to K-capture has been determined to be 0·112 ± 0·008, from measurements in a multi-wire proportional counter. Using scintillation techniques, a weak positron branch of intensity (7_(−1)^(+3)) × 10^(−4) relative to K-capture has been detected, and ...
Dougan, P. W. +2 more
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Chlorine Decay Models and Influencing Factors
Applied Mechanics and Materials, 2014Microorganism control has a great significance for the safety of drinking water and reclaimed water. Disinfectants and its dosing quantity are particularly important. Several common chlorine disinfectants decay models were analyzed firstly in the paper.
Bo Liu +4 more
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