In this paper, we present the evaluation results of the conversion efficiency of stable cyanide complexes using a specialized distillation system. The experiments show that the optimal distillation time for complexes of [Fe(CN)6]4-and [Fe(CN)6]3-is 60 minutes, conversion efficiencies of [Fe(CN)6]4- and [Fe(CN)6]3- are 100, 0,08 and 84 ± 0,02, respectively, and the average of recovery rate of complexes RTB is 90÷100. | JOURNAL OF SCIENCE OF HNUE DOI Natural Sci. 2016 Vol. 61 No. 9 pp. 113-122 This paper is available online at http EFFICIENCY EVALUATION OF STABLE CYANIDE COMPLEXES CONVERSION AND ITS APPLICATION Bui Thi Thu1 Trinh Kim Yen1 and Dao Van Bay2 1 Faculty of Environment Hanoi University of Natural Resources and Environment 2 Faculty of Chemistry Hanoi National University of Education Abstract. In this paper we present the evaluation results of the conversion efficiency of stable cyanide complexes using a specialized distillation system. The experiments show that the optimal distillation time for complexes of Fe CN 6 4-and Fe CN 6 3-is 60 minutes conversion efficiencies of Fe CN 6 4- and Fe CN 6 3- are 100 0 08 and 84 0 02 respectively and the average of recovery rate of complexes R TB is 90 100 . We further use the above-derived optimal experimental conditions to determine the cyanide concentration in metal-plating waste-water in Dong Anh district Hanoi city. Keywords Stable cyanide complexes conversion recovery rate waste-water metal plating. 1. Introduction During recent years along with the industrial development the environmental pollution has been increasing at an alarming rate. Due to typical characteristics of the industry of a developing country without general planning using obsolete processing technologies slack environmental regulations and other reasons most of industrial wastes without processing are disposed directly to environment causing pollutions. Among these above-mentioned water pollution is of great concern. Among the natural environmental destructions polluted water resources have already been exceeding permissible limits as per various parameters so that affecting directly to human being s health and other livings s. Among contaminated water waste-water containing cyanide group draws particular caution because of its toxicity. Containing just only 50 mg of Acid HCN the poluted watercan kill a person. .
