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Open AccessArticle

Decay of Free Residual Chlorine in Wells Water of Northern Brazil

1
Environmental Biogeochemistry Laboratory (WCP), Federal University of Rondônia (UNIR), Porto Velho-RO 76801-058, Brazil
2
Department of Civil Engineering, University of Victoria, Victoria, BC V8P 5C2, Canada
*
Author to whom correspondence should be addressed.
Academic Editors: Gabriele Freni and Mariacrocetta Sambito
Water 2021, 13(7), 992; https://doi.org/10.3390/w13070992
Received: 11 February 2021 / Revised: 30 March 2021 / Accepted: 1 April 2021 / Published: 4 April 2021
(This article belongs to the Special Issue Urban Water Networks Modelling and Monitoring)
The concentration of chlorine in water declines as it reacts with various substances, causing decay of the residual free chlorine until its total consumption. In light of the typical characteristics of the water from protected dug wells and tube wells, this study aimed to evaluate the decay kinetics of free chlorine in the water of alternative individual supply (AIS) solutions used in the city of Porto Velho in the Brazilian Amazon region. The free chlorine decay constant in the water was evaluated by “bottle tests,” applying a first-order model. According to the results, the type of well and initial chlorine concentration significantly influences the free chlorine decay speed. The water samples from the tubular wells had lower chlorine demand levels, attributed to their better water quality. The simulation of the residual chlorine decay in the different supply sources is an important tool to support safe disinfection processes. View Full-Text
Keywords: drinking water quality; disinfection; chlorine kinetics; Brazilian Amazon; free chlorination drinking water quality; disinfection; chlorine kinetics; Brazilian Amazon; free chlorination
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MDPI and ACS Style

Vargas, T.F.; Baía, C.C.; Machado, T.L.d.S.; Dórea, C.C.; Bastos, W.R. Decay of Free Residual Chlorine in Wells Water of Northern Brazil. Water 2021, 13, 992. https://doi.org/10.3390/w13070992

AMA Style

Vargas TF, Baía CC, Machado TLdS, Dórea CC, Bastos WR. Decay of Free Residual Chlorine in Wells Water of Northern Brazil. Water. 2021; 13(7):992. https://doi.org/10.3390/w13070992

Chicago/Turabian Style

Vargas, Taise F.; Baía, Célia C.; Machado, Tatiana L.d.S.; Dórea, Caetano C.; Bastos, Wanderley R. 2021. "Decay of Free Residual Chlorine in Wells Water of Northern Brazil" Water 13, no. 7: 992. https://doi.org/10.3390/w13070992

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