| 二氧化硫脲/Ca（OH）2-铁氧体法处理铜铬电镀废水工艺 |
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| 引用本文： | 曾炜,陈楷翰,黄妙龄,杨洁琼.二氧化硫脲/Ca（OH）2-铁氧体法处理铜铬电镀废水工艺[J].泉州师范学院学报,2008,26(4):67-70. |
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| 作者姓名： | 曾炜 陈楷翰 黄妙龄 杨洁琼 |
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| 作者单位： | 泉州师范学院,化学与生命科学学院,福建,泉州,362000 |
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| 摘 要： | 当二氧化硫脲用量是还原Cu^2＋为Cu与还原Cr^5＋为Cr^3＋理论值总和的两倍时，使用二氧化硫脲在石灰饱和溶液（pH≈12．8）、沸腾条件下处理铜铬电镀废水，废水中Cu^2＋从31mg／L降为0．4mg／L，Cr^5＋从23mg／L降为0．017mg／L，总铬量由35mg／L降为5．3mg／L，经分析沉淀物为Cu（黑色）、Cu2O、Cr（OH）3趁热过滤后，往滤液中加入FeSO4·7H2O，调节pH至中性，鼓入空气，冷却至得到黑色铁氧体沉淀．经处理后残铜量为0．2mg／L，总铬量为0．035mg／L，PO4^3-由5mg／L降为1mg／L．各项指标优于工业排放标准．
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| 关 键 词： | 铜铬电镀废水 二氧化硫脲/Ca(OH)2 一铁氧体法 Ca(OH)2 |
Technical Process for Treatment of Copper Chromium Waste Water by Dioxide Thiourea/Ca(OH)2-Ferrite |
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| ZENG Wei,CHEN Kai-han,HUANG Miao-ling,YANG Jie-qiong.Technical Process for Treatment of Copper Chromium Waste Water by Dioxide Thiourea/Ca(OH)2-Ferrite[J].Journal of Quanzhou Normal College,2008,26(4):67-70. |
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| Authors: | ZENG Wei CHEN Kai-han HUANG Miao-ling YANG Jie-qiong |
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| Institution: | (School of Chemistry and Life Science, Quanzhou Normal University, Fujian 362000, China) |
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| Abstract: | Under the condition of saturation （pH≈12.8） and ebullition of lime,by using dioxide thiourea in the processes of treating the copper chromium wastewater, the amount of dioxide thiourea are two times of sum total theory value when Cu^2＋ reduces to Cu,and Cr^6＋ reduces to Cr^3＋ ,we will obtain the value of Cu^2＋ reduces to 0.4 mg/L from 31 mg/L,Cr^6＋reduces to 0.017 mg/L from 23 mg/L,the total chromium quantity reduces to 5.3 mg/L from original 35 mg/L,and after analysing the settlings are Cu（black） ,Cu2O,Cr （OH）3. After Filtering the hot the solution,add FeSO4· 7H2O and adjust pH value to the neutrality, then fill in air to obtain the black ferrites precipitate after cooling the solution. After processing,the remained copper quantity is 0.2 mg/L,and the total chromium quantity is 0. 035 mg/L. Meanwhile,after this Technical processing, the phosphoric acid radical ion density reduces to 1 mg/L from 5 mg/L. The complete outcome of this project surpasses the industrial emission standard. |
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| Keywords: | Ca(OH)2 |
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