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Removal of free cyanide in waste water through complexation with Fe(II) iron followed by alkaline chlorination. Tetsu (II) ion ni yoru sakka hanno wo maeshori to suru haisuichu no yuri sian no shori

Journal Article:

Abstract

The removal treatment of free cyanide in waste water was tested by complexation with Fe(2) ion followed by alkaline chlorination and precipitation of residual iron cyano complex to study saving of sodium hypochlorite (NaClO) for alkaline chlorination. The complexation with Fe(2) ion was studied in batch treatment under the coexistence with zinc ion assuming plating waste water, while the relation between the complexation and effective chlorine consumption in alkaline chlorination was studied in continuous treatment. As a result, the effective chlorine consumption was greatly decreased by pretreatment, and a cyanic acid ion (CNO{sup {minus}}) concentration was also lower than that in conventional methods. In the case of free cyanide with lower initial concentration, the total cyanide concentration in final treated water offered sufficiently low values only by adding zinc salt, while in higher initial concentration, it reached 1 ppm or less through precipitation by adding a reductant together with zinc salt. 9 refs., 7 figs., 2 tabs.
Authors:
Nishikubo, N; Tanihara, K; Yasuda, S [1] 
  1. Government Industrial Research Institute, Kyushu, Fukuoka (Japan)
Publication Date:
Nov 01, 1991
Product Type:
Journal Article
Reference Number:
NEDO-92-930121; EDB-92-110896
Resource Relation:
Journal Name: Kyushu Kogyo Gijutsu Shikensho Hokoku; (Japan); Journal Volume: 47
Subject:
54 ENVIRONMENTAL SCIENCES; CHELATES; CHEMICAL PREPARATION; IRON IONS; WASTE PROCESSING; CYANIDES; WASTE WATER; CHLORINE COMPOUNDS; CONSUMPTION RATES; PRECIPITATION; REDUCING AGENTS; ZINCATES; CHARGED PARTICLES; COMPLEXES; HALOGEN COMPOUNDS; HYDROGEN COMPOUNDS; IONS; LIQUID WASTES; MANAGEMENT; OXYGEN COMPOUNDS; PROCESSING; SEPARATION PROCESSES; SYNTHESIS; WASTE MANAGEMENT; WASTES; WATER; ZINC COMPOUNDS; 540320* - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)
OSTI ID:
5149105
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Journal ID: ISSN 0385-9436; CODEN: KKGHD
Submitting Site:
NEDO
Size:
Pages: 27-31
Announcement Date:

Journal Article:

Citation Formats

Nishikubo, N, Tanihara, K, and Yasuda, S. Removal of free cyanide in waste water through complexation with Fe(II) iron followed by alkaline chlorination. Tetsu (II) ion ni yoru sakka hanno wo maeshori to suru haisuichu no yuri sian no shori. Japan: N. p., 1991. Web.
Nishikubo, N, Tanihara, K, & Yasuda, S. Removal of free cyanide in waste water through complexation with Fe(II) iron followed by alkaline chlorination. Tetsu (II) ion ni yoru sakka hanno wo maeshori to suru haisuichu no yuri sian no shori. Japan.
Nishikubo, N, Tanihara, K, and Yasuda, S. 1991. "Removal of free cyanide in waste water through complexation with Fe(II) iron followed by alkaline chlorination. Tetsu (II) ion ni yoru sakka hanno wo maeshori to suru haisuichu no yuri sian no shori." Japan.
@misc{etde_5149105,
title = {Removal of free cyanide in waste water through complexation with Fe(II) iron followed by alkaline chlorination. Tetsu (II) ion ni yoru sakka hanno wo maeshori to suru haisuichu no yuri sian no shori}
author = {Nishikubo, N, Tanihara, K, and Yasuda, S}
abstractNote = {The removal treatment of free cyanide in waste water was tested by complexation with Fe(2) ion followed by alkaline chlorination and precipitation of residual iron cyano complex to study saving of sodium hypochlorite (NaClO) for alkaline chlorination. The complexation with Fe(2) ion was studied in batch treatment under the coexistence with zinc ion assuming plating waste water, while the relation between the complexation and effective chlorine consumption in alkaline chlorination was studied in continuous treatment. As a result, the effective chlorine consumption was greatly decreased by pretreatment, and a cyanic acid ion (CNO{sup {minus}}) concentration was also lower than that in conventional methods. In the case of free cyanide with lower initial concentration, the total cyanide concentration in final treated water offered sufficiently low values only by adding zinc salt, while in higher initial concentration, it reached 1 ppm or less through precipitation by adding a reductant together with zinc salt. 9 refs., 7 figs., 2 tabs.}
journal = {Kyushu Kogyo Gijutsu Shikensho Hokoku; (Japan)}
volume = {47}
journal type = {AC}
place = {Japan}
year = {1991}
month = {Nov}
}