Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China; Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming, 650500, PR China; The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming, 650500, PR China.
Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming, 650500, PR China; Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials, Kunming, 650500, PR China; The Higher Educational Key Laboratory for Phosphorus Chemical Engineering of Yunnan Province, Kunming, 650500, PR China.
J Hazard Mater. 2020 Apr 15;388:121748. doi: 10.1016/j.jhazmat.2019.121748. Epub 2019 Nov 23.
The emission of SO and the disposal of waste phosphate mine tailings are generally regarded as two major environmental issues in phosphorus chemical activities. In this paper, an environmentally friendly and efficient route for removing SO from phosphorus chemical processes by using waste phosphate mine tailings as adsorbent was proposed. It was indicated that the desulfurization performance of the waste phosphate mine tailings was better than that of its raw ore. The characterization analysis illustrated that higher content of CaMg(CO) was shown on the waste phosphate mine tailings, which played a dominant role in determining the better desulfurization activity. In contrast, the accumulation of PO and H ions resulted from the dissolution of Ca(PO)F on the raw ore caused negative effect on SO removal. In the typical desulfurization system, the produced sulfuric acid from desulfurization process was used to decompose phosphate mine tailings, and these spent tailings can be subsequently applied as raw materials for the production of phosphorus products. As a result, the present approach can achieve the dual goal of reducing the cost of desulfurization process and recycling the waste tailings, which is of great environmental and economic significance.
SO 的排放和磷矿尾矿的处置通常被认为是磷化工活动中的两个主要环境问题。本文提出了一种用磷矿尾矿作为吸附剂从磷化工过程中去除 SO 的环保高效途径。结果表明，磷矿尾矿的脱硫性能优于原矿。特征分析表明，磷矿尾矿中含有更多的 CaMg(CO)，这对确定更好的脱硫活性起着主导作用。相比之下，原矿中 Ca(PO)F 的溶解导致 PO 和 H 离子的积累对 SO 的去除产生了负面影响。在典型的脱硫系统中，脱硫过程中产生的硫酸用于分解磷矿尾矿，这些用过的尾矿随后可作为生产磷产品的原料。因此，本方法可以实现降低脱硫成本和尾矿回收的双重目标，具有重要的环境和经济意义。
