PDF] Kinetics of tap water dechlorination and aquatic health impacts of selected dechlorination chemicals

The kinetics of seven dechlorination agents (DA) was studied to identify the efficacy of dechlorination under variable dosage, mixing (periodic/continuous), and pH conditions (6.5 8.6 and/or >9). Dechlorination reactions at lx stoichiometric dosage (mg DA/ mg CI2) of the DAs are rapid in most cases, but not instantaneous and in some cases needed more than stoichiometric dosage to ensure a near zero residual level (0.02 mg/L total residual chlorine, as required by CEPA (1999)). Dechlorination kinetic analysis revealed reactions were either pseudo-first or zero order with respect to total chlorine concentration in solution at the lOx stoichiometric dosage and second order overall at 2 4x stoichiometric dosages. 48-hour aquatic toxicity tests were conducted using Daphnia magna to identify the acute (short-term) toxicity affects of the dechlorination chemicals over a range of concentrations (0 200 mg/L). Sodium sulfite and thiosulfate were found to have the least aquatic mortality effects while hydrogen peroxide and calcium thiosulfate had the most deleterious effects.

Synergistic decolorization and detoxication of reactive dye Navy

PDF] Kinetics of tap water dechlorination and aquatic health

Production of highly porous biochar via microwave physiochemical

Photochemical fate of quaternary ammonium compounds in river water

PDF) Coupling Aggressive Mass Removal with Microbial Reductive

PDF) UV disinfection of chlorinated water: Impact on chlorine

Inorganic Organic Composites For Water and Wastewater Treatment

1,2,3-Trichloropropane - Enviro Wiki

WASTEWATER TREATMENT TECHNOLOGIES FOR THE REMOVAL OF NITROGEN

NSF-ANSI 60 Watemarked PDF, PDF, Water Purification

AWT 2022 Tech Supplement by Association of Water Technologies

Membranes, Free Full-Text

Comparison of Reaction Rates and Relative Efficiencies for Various

Chlorine - Wikipedia