ICP-AES法测定磷矿浆烟气脱硫剂固液相中硫含量的研究

发布时间：2018-03-23 07:30

  本文选题：ICP-AES　切入点：硫　出处：《光谱学与光谱分析》2017年05期 　论文类型：期刊论文

【摘要】：SO2是大气主要污染物,与雾霾的形成有直接关系,烟气脱硫是保护环境、减少雾霾的有效措施。磷矿浆法烟气脱硫是一种以磷矿浆为吸收剂的新型脱硫方法。采用电感耦合等离子体原子发射光谱(ICPAES)法测定磷矿浆烟气脱硫剂固液相(磷矿粉、磷矿浆脱硫液和脱硫渣)中硫含量。在选定了较灵敏的硫分析线后,探讨了ICP光谱仪工作条件对分析结果的影响,同时研究了样品预处理方法以及共存元素对硫测定结果的影响。分别用三种不同的方式对磷矿粉、磷矿浆脱硫液和脱硫渣样品进行前处理,确保样品溶解完全。选用181.973nm光谱线为分析线,避免共存元素的光谱干扰。选择仪器的入射功率为1 300W,观测高度为12mm,雾化气流量为0.65L·min-1,泵进样量为1.5mL·min-1。在光谱仪最佳分析条件下,利用该方法测定磷矿粉、磷矿浆脱硫液及脱硫渣中硫的含量,其检出限为0.000 38%,加标回收率在89.5%~104.5%之间,相对标准偏差(RSD)≤2.30%,同时与硫酸钡重量法进行对比实验,结果基本吻合,相对偏差≤3.88%,该方法简便快捷,精密度和准确度较高,适用于磷矿浆脱除烟气SO2的科研及生产中。
[Abstract]:SO2 is a major pollutant in the atmosphere, which is directly related to the formation of haze. Flue gas desulfurization (FGD) is to protect the environment. It is a new desulfurization method with phosphate rock slurry as absorbent. The method of inductively coupled plasma atomic emission spectrometry (ICP-AES) is used to determine the solid liquid phase (phosphate rock powder) of flue gas desulfurization agent of phosphate rock slurry. Sulfur content in desulphurization solution and slag of phosphate rock slurry. After selecting a sensitive sulfur analysis line, the influence of working conditions of ICP spectrometer on the analysis results was discussed. At the same time, the sample pretreatment method and the influence of coexisting elements on the sulfur determination results were studied. The samples of phosphate rock powder, phosphate rock slurry desulfurization solution and desulfurized slag were pretreated in three different ways. The sample is dissolved completely. The 181.973nm spectral line is chosen as the analysis line to avoid the spectral interference of coexisting elements. The incident power of the instrument is 1 300W, the observation height is 12mm, the atomization gas flow rate is 0.65L min-1, and the pump injection quantity is 1.5mL min-1. Under the optimum analytical conditions of the spectrometer, This method was used to determine the sulfur content in phosphate rock powder, phosphate slurry desulfurization solution and desulphurized slag. The detection limit was 0.000 and the recovery rate was between 89.55% and 104.5%. The relative standard deviation (RSD) was less than 2.30. The results were in good agreement with the barium sulfate gravimetric method. The relative deviation is less than 3.88. The method is simple, rapid, accurate and accurate. It is suitable for the research and production of SO2 removal from flue gas by phosphate slurry.
【作者单位】： 省部共建复杂有色金属资源清洁利用国家重点实验室;云南省有色金属真空冶金重点实验室;真空冶金国家工程实验室;
【基金】：教育部“创新团队发展计划”项目(IRT1250) 国家自然科学基金青年基金项目(51304096) 云南省应用基础研究自筹经费项目(2013FZ028)资助
【分类号】：O657.31;X754
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本文编号：1652474