TY - JOUR T1 - Control effects of p(epsilon) and pH on the generation and stability of chlorine dioxide. AU - Pei,Yuan-Sheng, AU - Wu,Xiao-Qing, AU - Luan,Zhao-Kun, AU - Wang,Tong, PY - 2003/10/18/pubmed PY - 2004/1/6/medline PY - 2003/10/18/entrez SP - 680 EP - 4 JF - Journal of environmental sciences (China) JO - J Environ Sci (China) VL - 15 IS - 5 N2 - A new method, without assistance of activity ratio diagram, was applied to construct the p(epsilon)-pH diagrams for chlorine system. The optimal pH range for generation of C1O2 by contacting Cl2 (g) directly with ClO2- solution is within pH 1.35-1.94, particularly within pH 1.35-4.00 only if minimizing the formation of Cl2. It is unachievable to synthesize pure ClO2 from the reaction of Cl2 and ClO2- . Conversely, ClO2 may be present a variation of stability in different waters owing to the changed p(epsilon) and pH. ClO2 could be relatively stable if not disproportionate into ClO3-, coexisting with ClO2- (p(epsilon) 17.63 and pH > 9.68), Cl2(pH < or = 0.92) or Cl- (pH 0.92-9.68). When chlorine system has already reached the ultimate equilibria, ClO2 is a stable species in strongly acid media. As the acidity decreases, ClO2 disproportionates into ClO3- and Cl2. Aqueous ClO2 is unstable within the normal pH range. This work initially, theoretically elucidates the generation and stability of ClO2 by way of the p(epsilon)-pH diagrams. SN - 1001-0742 UR - https://www.unboundmedicine.com/medline/citation/14562931/Control_effects_of_p_epsilon__and_pH_on_the_generation_and_stability_of_chlorine_dioxide_ DB - PRIME DP - Unbound Medicine ER -