高铁酸钾氧化含选矿药剂废水的研究

发布时间：2018-06-02 13:16

本文选题：高铁酸钾 + 氧化处理　；参考：《首都经济贸易大学》2017年硕士论文

【摘要】：丁基黄药和乙硫氮是选矿废水中残留的两种常用的选矿药剂,生物毒性大。含丁基黄药和乙硫氮等浮选药剂的选矿废水不经处理直接排放进入水体,会导致水质恶化,散发恶臭,破坏矿区生态环境,威胁矿区职工及周边居民的身体健康。因此,去除选矿废水中的残留浮选药剂显得尤为重要。本论文研究了用高铁酸钾处理含丁基黄药模拟废水、乙硫氮模拟废水和实际选矿废水的净化效果,研究了反应条件对两种浮选药剂去除率的影响,并对两种药剂的氧化产物进行了初步鉴定。研究结果表明:1、反应条件对高铁酸钾氧化丁基黄药和乙硫氮去除率的影响。随着高铁酸钾投加量的增大、pH值的降低、温度升高和反应时间的延长,丁基黄药去除率逐渐升高。在室温、起始pH值为8、高铁酸钾起始浓度为0.6g/L、乙硫氮初始浓度0.2g/L、丁基黄药初始浓度0.2g/L和反应1min的条件下,乙硫氮去除率达到56.75%,丁基黄药去除率达到50.03%。高铁酸钾投加量为1g/L,反应45min时,乙硫氮去除率达92.59%,黄药去除率达98.57%。2、正交试验结果表明:在高铁酸钾对乙硫氮的氧化过程中,pH值影响最强,高铁酸钾浓度次之,时间最弱。在pH值为6,K2FeO4浓度为0.6g/L,反应时间为45min时,对乙硫氮去除效果最好。在高铁酸钾对丁基黄药的氧化过程中,高铁酸钾浓度影响最强,pH值次之,时间最弱。在K2FeO4浓度为0.6g/L,反应时间为45min,pH值为6时,对黄药去除效果最好。3、用紫外波长扫描在200~450nm范围内分别对丁基黄药乙硫氮降解情况进行扫描,结果表明,在60min的氧化时间内,黄药、乙硫氮被降解为其他形式的有机物,很好的达到了去除选矿药剂的目的。利用GC/MC分别对对丁基黄药和乙硫氮氧化过程的副产物进行鉴定分析,证明乙硫氮氧化副产物为异硫氰酸乙酯。黄药的氧化副产物为丁酸和丁醇。红外光谱试验结果显示,乙硫氮原样与降解后产物相比,反射光谱峰锐明显减弱,其中的乙硫氮基被氧化为其他产物。将黄药原样与降解后产物的红外光谱图进行对比,黄原酸盐琉基的红外吸收峰明显减弱。这说明法能有效地将硫元素转化为相应的含氧酸根,降低了二次污染的程度,此法适用于氧化降解丁基黄药和乙硫氮。4、用高铁酸钾处理实际硫化矿浮选废水,废水净化效果良好。此法起到了很好的废水净化作用。当废水高铁酸钾浓度越高,废水中重金属离子和浮选药剂的去除效果越好,高铁酸钾的添加对废水pH值起到了调节作用,处理后废水中重金属含量达到《城镇污水处理厂污染物排放标准》GB18918-2002排放标准要求。
[Abstract]:Ding Ji xanthate and ethanazide are two commonly used mineral beneficiation agents in the mineral processing wastewater, with great biological toxicity. The mineral processing wastewater containing Ding Ji xanthate and eththulfide and other flotation reagents will be discharged directly into the water body without treatment. It will lead to the deterioration of the water quality, emanate the odor, destroy the ecological environment in the mining area, and threaten the health of the workers and the residents in the mining area. Therefore, it is very important to remove the residual flotation reagents in the mineral processing wastewater. In this paper, the effects of treating wastewater containing butyl xanthate, simulated wastewater of ethyl thulfide and actual beneficiation wastewater were studied with potassium ferrate. The effects of reaction conditions on the removal rate of two kinds of flotation reagents were studied, and the oxidation products of two kinds of agents were first introduced. The results showed that: 1, the effect of reaction conditions on the removal rate of oxidation butyl xanthate and eththulfide in potassium ferrate. With the increase of the dosage of potassium ferrate, the decrease of pH value, the increase of temperature and the time of reaction increase, the removal rate of butyl xanthate gradually increases. At room temperature, the initial pH value is 8, and the initial concentration of potassium ferrate is 0.6g/L, eththulfide nitrogen. Under the initial concentration of 0.2g/L, the initial concentration of butyl xanthate 0.2g/L and reaction 1min, the removal rate of ethyl thiazonazide reached 56.75% and the removal rate of butyl xanthate reached 50.03%. potassium ferrate dosage 1g/L. When the reaction 45min, the removal rate of ethyl thiazonazo was 92.59%, and the removal rate of xanthate reached 98.57%.2. The orthogonal test results showed that the oxygen of ethyl thiazide was in the orthogonal test. During the process, the pH value has the strongest influence, the potassium ferrate concentration is the second, the time is the weakest. When the pH value is 6, the K2FeO4 concentration is 0.6g/L, the reaction time is 45min, the removal effect is best. In the oxidation process of the butyl xanthate, the effect of potassium ferrate concentration is the strongest, the pH value is the lowest and the time is the weakest. When the K2FeO4 concentration is 0.6g/L, the reaction is the reaction time. When 45min and pH value are 6, the best removal effect of xanthate is.3. The degradation of ethyl thiazide in butyl xanthate is scanned by UV wavelength scanning in 200~450nm range. The result shows that in the oxidation time of 60min, xanthate and thiazoxide are degraded into other forms of organic matter, and the purpose of removing mineral preparation agents is good. GC The by-products of the oxidation of butyl xanthate and ethnoxyl nitrogen were identified and analyzed by /MC. It was proved that the byproduct of ethnoxyl nitrogen oxidation was ethyl isothiocyanate. The oxidation by-products of xanthate were butyric acid and butanol. The base was oxidized to other products. The infrared absorption peak of xanthate was obviously weakened by comparing the infrared spectrum of the original xanthate with the degraded product. This shows that the method can effectively convert the sulfur element into the corresponding oxyacid root and reduce the degree of two pollution. This method is suitable for the oxidation and degradation of butyl xanthate and ethiazone.4. Potassium ferric acid is used to treat the actual sulfide flotation wastewater with good purification effect. This method has played a very good role in the purification of wastewater. When the concentration of potassium ferrate is higher, the better the removal effect of heavy metal ions and flotation reagents in the wastewater, the addition of potassium ferrate to the pH value of waste water is regulated, and the content of heavy metals in the wastewater after treatment is reached. < < Standard for discharge of pollutants from municipal sewage treatment plants >GB18918-2002 emission standard.
【学位授予单位】：首都经济贸易大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X751

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