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Treatment and disposal specification for cyanide wastewater
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Basic data
| Standard ID | GB/T 32123-2015 (GB/T32123-2015) |
| Description (Translated English) | Treatment and disposal specification for cyanide wastewater |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | Z05 |
| Classification of International Standard | 13.030.20 |
| Word Count Estimation | 9,963 |
| Date of Issue | 2015-10-09 |
| Date of Implementation | 2016-05-01 |
| Quoted Standard | GB 5085.1; GB 5085.3; GB 8978; HJ 484; HJ 585 |
| Regulation (derived from) | National Standard Announcement 2015 No.31 |
| Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China |
| Summary | This Standard specifies the cyanide-containing waste water treatment and disposal of terms and definitions, requirements and emission treatment and disposal methods. This Standard applies to the process of treatment and disposal of wastewater containing cyanide. |
GB/T 32123-2015: Treatment and disposal specification for cyanide wastewater
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Cyanide-containing wastewater treatment and disposal norms)
ICS 13.030.20
Z05
National Standards of People's Republic of China
Cyanide waste water treatment and disposal norms
Issued on. 2015-10-09
2016-05-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Foreword
This standard was drafted in accordance with GB/T 1.1-2009 given rules.
The standard proposed by China Petroleum and Chemical Industry Association.
This standard by the national waste chemicals disposal Standardization Technical Committee (SAC/TC294) centralized.
This standard was drafted. Anqing Shuguang Chemical Co., Ltd., Hebei integrity limited liability company, CNOOC Tianjin Chemical
Research and Design Institute, Shenzhen Hazardous Waste Treatment Station Co., Ltd.
The main drafters of this standard. Chenzhang Bin, Shen Yinshan, Guofeng Xin, tall Ming Cheng Ni root, Yang Yang, Wang Lin.
Cyanide waste water treatment and disposal norms
1 Scope
This standard specifies the cyanide-containing waste water treatment and disposal of terms and definitions, treatment and disposal methods and emission requirements.
This standard applies to the process of treatment and disposal of wastewater containing cyanide.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB 5085.1 standard differential corrosive hazardous waste identification
GB 5085.3 identification of hazardous waste leaching toxic identification standard
GB 8978 Integrated Wastewater Discharge Standard
Water quality was measured HJ484 cyanide capacity and spectrophotometric methods
HJ585 free chlorine and total chlorine N, N- diethyl-1,4-phenylenediamine titration
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1
Wastewater containing cyanide cyanidewastewater
Containing inorganic cyanide (CN-), thiocyanate (SCN-) or cyanide-based metal complexes of industrial waste water generated in the process.
4 containing cyanide wastewater treatment and disposal methods
4.1 Acidification Recycling Law
4.1.1 Application
Suitable for processing containing inorganic cyanide (CN-) or cyanide-based metal complexes (except iron cyanide complexes) of wastewater containing cyanide. Applicable concentration
Cyanide (as CN) content of not less than 1g/L.
4.1.2 Principle
Hydrocyanic acid is a weak acid, the ionization equilibrium constant Ka = 6.2 × 10-10, a boiling point of 25.7 ℃, easy to volatilize, under acidic conditions, wastewater
Inorganic cyanides tend to form hydrogen cyanide (HCN), absorption by water acidification, hydrogen cyanide and hydrogen cyanide gas stripping to achieve recovery
Purpose of cyanide ions.
NaCN H = HCN Na
Pb (CN) 2-4 4H = 4HCN Pb2
Zn (CN) 2-4 4H = 4HCN Zn2
Cu (CN) 2-3 2H = 2HCN CuCN ↓ (gray)
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