采用沉淀-离子交换联合工艺处理氰化提金废水，重点考察了CuSO4·5H2 O用量及沉淀时间对各种离子沉淀率的影响，以及树脂的用量及吸附时间对各种离子综合去除率的影响。试验结果表明，当取CuSO4·5H2 O理论用量的1．5倍、沉淀时间为60 min时，CN -、Fe、Zn离子沉淀率均可达到93％以上，而 Cu 离子沉淀率为50％左右。 XRD 分析表明，沉淀物主要由Zn2[Fe（CN）6]、Cu2[Fe（CN）6]、CuCN及Zn（OH）2组成。吸附试验表明，当201×7树脂用量为5 mL、废水体积为100 mL、常温吸附75 min时，氰化提金废水中CN-及Cu、Fe、Zn离子的综合去除率分别可达到99．94％、71．23％、100％和99．95％，处理后废水中游离氰及铁、锌质量浓度达到了《GB 8978-1996污水综合排放标准》一级排放指标。
The combination process of precipitation-ion exchange was used for disposing the cyanidation wastewater.The influence of dosage and time of CuSO 4 · 5H2 O,precipitation on the precipitation rate of each kind of ions were studied on focus ,as well as the influence of dosage of resin ,adsorption time on the comprehensive removal of each kind of ions .The results showed that the optimum conditions for the precipitation were determined as follows:the dosage of CuSO 4 · 5H2 O was 1.5 times the theoretical amount ,the precipitation time is 60 min.And with this,the pre-cipitation rate of CN -,Fe and Zn ions are more than 93 %,but that of Cu only reaches 50 %.XRD showed that the precipitates were composed of CuCN,Zn(OH)2,Zn2 [Fe(CN)6] and Cu2 [Fe(CN)6].Adsorption experiments showed that the comprehensive removal of the CN -and Cu, Fe, Zn ions in waste water can respectively reach 99 .94 %、71 .23 %、100 %and 99 .95 %with the usage of 201 ×7 resin 5 mL cyanide-wastewater volume 100 mL and precipitation time 75 min under normal temperature .Thanks to the treatment ,mass concentration of CN -and Cu, Fe,Zn ions in waste water are controlled under the level national first class standard of industrial waste water emis -sion.
参考文献
| [1] | Bixia WANG;Xinzhe LAN;Yonghui SONG .Copper Electrowinning from Gold Plant Cyanide-Containing Solution[J].Materials Science Forum,2009(Pt.1):41-47. |
| [2] | Xianwen Dai;Andrew Simons;Paul Breuer .A review of copper cyanide recovery technologies for the cyanidation of copper containing gold ores[J].Minerals Engineering,2012(1):1-13. |
| [3] | 薛文平,薛福德,姜莉莉,付瑞娟,褚亮亮,王晓霞,马洪杰.含氰废水处理方法的进展与评述[J].黄金,2008(04):45-50. |
| [4] | 李建勃,蔡德耀,刘书敏,秦彪.含氰废水化学处理方法的研究进展及其应用[J].能源与环境,2009(04):84-85,96. |
| [5] | X. Dai;P.L Breuer;M.I. Jeffrey .Comparison of activated carbon and ion-exchange resins in recovering copper from cyanide leach solutions[J].Hydrometallurgy,2010(1/2):48-57. |
| [6] | Depci Tolga .Comparison of activated carbon and iron impregnated activated carbon derived from G?lbas lignite to remove cyanide from water[J].CHEMICAL ENGINEERING JOURNAL,2012,181:467-478. |
| [7] | 马红周,杨明,兰新哲,王耀宁.活性炭吸附酸化后的含氰废水试验研究[J].黄金,2007(09):56-58. |
| [8] | Xie Feng;Dreisinger David .Studies on solvent extraction of copper and cyanide from waste cyanide solution[J].Journal of Hazardous Materials,2009,169:333-338. |
| [9] | Lee seung-mok;Tiwari diwakar .Application of ferrate(Ⅵ) in the treatment of industrial wastes containing metal-complexed cyanides:A green treatment[J].Journal of Environmental Sciences,2009,21:1347-1352. |
| [10] | Urszula Kepa;Ewa Stanczyk-Mazanek;Longina Stepniak .The use of the advanced oxidation process in the ozone + hydrogen peroxide system for the removal of cyanide from water[J].Desalination: The International Journal on the Science and Technology of Desalting and Water Purification,2008(1/3):187-193. |
| [11] | Javier Marugan;Rafael van Grieken;Alberto E. Cassano .Scaling-up of slurry reactors for the photocatalytic oxidation of cyanide with TiO2 and silica-supported TiO2 suspensions[J].Catalysis Today,2009(1/2):87-93. |
| [12] | F. Barriga-Ordonez;F. Nava-Alonso;A. Uribe-Salas .Cyanide oxidation by ozone in a steady-state flow bubble column[J].Minerals Engineering,2006(2):117-122. |
| [13] | Aguado J;Grieken R van;Mu鼻oz M J L蹦pez .Removal of cyanides in wastewater by supported TiO2-based photocatalysts[J].Catalysis Today,2002,75:95-102. |
| [14] | 曹会兰,王淑荣,高晓明.纳米高分子絮凝剂在氰化污水中的应用研究[J].广州化工,2010(02):149-150. |
| [15] | 党晓娥,兰新哲,张秋利,董缘.离子交换树脂和交换纤维处理含氰废水[J].有色金属（冶炼部分）,2012(02):37-41. |
| [16] | 王碧侠,兰新哲,宋永辉.用D301树脂回收含氰溶液中的游离氰[J].有色金属,2006(02):71-73. |
| [17] | 宋永辉,兰新哲,张秋利.树脂吸附回收提金尾液中氰化物的研究[J].贵金属,2005(04):39-43. |
| [18] | 廖赞,兰新哲,朱国才.201×7强碱性阴离子交换树脂对氰化物的吸附性能及吸附机理[J].黄金,2008(07):46-50. |
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