發(fā)布時(shí)間：2018-06-27 01:21

  本文選題：鉀鹽浮選捕收劑 + 十八烷胺�。� 參考：《青海師范大學(xué)》2015年碩士論文

【摘要】：以分光光度法測(cè)定鹵水中的十八烷胺。將樣品中的十八烷胺萃出,向萃取得到的三氯甲烷-十八烷胺體系內(nèi)添加溴甲酚綠的三氯甲烷溶液進(jìn)行顯色,顯色后在特定波長(zhǎng)下測(cè)量吸光度,得到十八烷胺濃度。實(shí)驗(yàn)結(jié)果表明:溴甲酚綠可以對(duì)三氯甲烷中的十八烷胺進(jìn)行顯色,最大吸收波長(zhǎng)在421.5 nm處,該方法在0-4μg/mL范圍內(nèi)符合朗伯-比爾定律,線性相關(guān)系數(shù)R2=0.9985,加樣回收率為101.8%,RSD=1.475%。實(shí)驗(yàn)將此方法進(jìn)一步拓展,將有機(jī)相三氯甲烷替換成環(huán)己烷,測(cè)定環(huán)己烷中十八烷胺的含量。實(shí)驗(yàn)結(jié)果表明:溴甲酚綠亦可對(duì)環(huán)己烷中的十八烷胺顯色,最大吸收波長(zhǎng)在416.5 nm處,在0-5μg/mL范圍內(nèi)符合朗伯-比爾定律,線性相關(guān)系數(shù)R2=0.9996,加樣回收率為98.28%,RSD=3.87%。此種方法靈敏度高,重現(xiàn)性好,并為后續(xù)實(shí)驗(yàn)提供了一種操作簡(jiǎn)單,方便快捷的測(cè)定十八烷胺濃度的新方法。在浮選水溶液中十八烷胺的基礎(chǔ)上利用溶劑浮選法分離實(shí)際鹵水中的十八烷胺。實(shí)驗(yàn)結(jié)果表明:以環(huán)己烷為浮選溶劑浮選十八烷胺溶液,初始濃度為10μg/mL,溶液pH=10,浮選時(shí)間為40 min,空氣流速為64 mL/min時(shí),十八烷胺的回收率為80.12%;以環(huán)己烷為浮選溶劑浮選鹽湖鹵水中的十八烷胺,浮選pH=6,浮選時(shí)間為50 min,空氣流速為64 m L/min時(shí),十八烷胺的回收率達(dá)到84.31%。采用凹凸棒石吸附水中的十八烷胺。在材料表征的基礎(chǔ)上,考察了吸附劑初始濃度、吸附時(shí)間及溶液pH對(duì)凹凸棒石吸附十八烷胺的影響。結(jié)果表明,凹凸棒對(duì)十八烷胺的吸附效果良好,且吸附率隨著吸附劑用量和時(shí)間的增加而增加,吸附時(shí)間為2.5h時(shí)吸附達(dá)到平衡,pH值為8-10時(shí)的吸附效果最好。以Fe3O4復(fù)合埃洛石制備了磁性埃洛石吸附材料,并對(duì)材料進(jìn)行表征,以此材料吸附水中的十八烷胺,研究了吸附劑初始濃度、吸附時(shí)間及溶液pH對(duì)磁性埃洛石吸附十八烷胺的影響。結(jié)果表明吸附率隨著吸附劑用量和時(shí)間的增加而增加,吸附時(shí)間為3h時(shí)吸附達(dá)到平衡,pH值為10左右時(shí)的吸附效果最好。利用介質(zhì)阻擋放電等離子體技術(shù)處理水中的十八烷胺。實(shí)驗(yàn)結(jié)果表明:初始濃度為6μg/mL、放電功率為160 W、初始pH=10、曝氣量為100 mL/min、處理時(shí)間為60 min時(shí),十八烷胺的去除率達(dá)到90%。
[Abstract]:Octadecylamine in brine was determined by spectrophotometry. The octadecylamine was extracted from the sample, and the concentration of octadecylamine was obtained by adding bromo-cresol green to the system of trichloromethane-octadecylamine. The absorbance of octadecylamine was measured at a specific wavelength. The experimental results show that bromocresol green can color octadecylamine in trichloromethane. The maximum absorption wavelength is at 421.5 nm. The method obeys Lambert-Beer 's law in the range of 0-4 渭 g / mL, the linear correlation coefficient is 0.9985, and the recovery is 101.8%. The method was further developed by replacing the organic phase trichloromethane with cyclohexane and determining the content of octadecylamine in cyclohexane. The experimental results show that bromocresol green can also develop octadecylamine in cyclohexane. The maximum absorption wavelength is at 416.5 nm and the linear correlation coefficient is R _ 2N _ (0.9996) in the range of 0-5 渭 g / mL, the linear correlation coefficient is 0.9996, and the recovery is 98.28 ~ 3.87g / mL. This method has high sensitivity and good reproducibility, and provides a new method for the determination of octadecylamine concentration. Octadecylamine in real brine was separated by solvent flotation on the basis of flotation of octadecylamine in aqueous solution. The experimental results show that when the initial concentration is 10 渭 g / mL, pH is 10, flotation time is 40 min, air flow rate is 64 mL / min, cyclohexane is used as the flotation solvent for the flotation of octadecylamine solution, the initial concentration is 10 渭 g / mL, and the flotation time is 40 min. The recovery rate of octadecylamine is 80.12 and the recovery rate of octadecylamine is 84.31 when the flotation pH is 6, the flotation time is 50 min, the air flow rate is 64 mL / min, and cyclohexane is used as the flotation solvent for the flotation of octadecylamine in salt lake brine. Attapulgite was used to adsorb octadecylamine in water. The effects of initial concentration of adsorbent, adsorption time and pH of solution on the adsorption of octadecylamine by attapulgite were investigated. The results showed that the adsorption effect of attapulgite on octadecylamine was good, and the adsorption rate increased with the increase of the amount of adsorbent and time. The best adsorption effect was achieved when the adsorption time was 2.5 h when the equilibrium pH value was 8-10. The magnetic errolite adsorbent was prepared from Fe _ 3O _ 4 composite errolide and characterized to adsorb octadecylamine in water. The initial concentration of adsorbent was studied. The effect of adsorption time and pH value on the adsorption of octadecylamine by magnetic aloxite. The results show that the adsorption rate increases with the increase of the amount of adsorbent and the adsorption time. When the adsorption time is 3 h, the adsorption efficiency is the best when the adsorption reaches the equilibrium pH value of about 10. Octadecylamine in water was treated by dielectric barrier discharge (DBD) plasma technique. The experimental results show that when the initial concentration is 6 渭 g / mL, the discharge power is 160 W, the initial pH is 10, the aeration rate is 100 mL / min, and the treatment time is 60 min, the removal rate of octadecylamine reaches 90%.
【學(xué)位授予單位】：青海師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TD923;TS392

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