Crystallization kinetics modeling for fluoride removal from steam ammonia wastewater by chemical precipitation

被引：0
|
作者：
Xin S. [1 ]
Guo X. [1 ]
Hao H. [2 ]
Liu Y. [1 ]
机构：
[1] School of Environmental Science and Engineering, Tianjin University, Tianjin
[2] School of Chemical Engineering and Technology, Tianjin University, Tianjin
来源：
Huagong Xuebao/CIESC Journal | 2016年 / 67卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Crystallization; Kinetic modeling; Precipitation; Wastewater;
D O I：
10.11949/j.issn.0438-1157.20151079
中图分类号：
学科分类号：
摘要：
The precipitation crystallization kinetics model for fluorite was deduced based on the two-step crystallization theory of mass diffusion and surface reaction. Using calcium chloride as precipitating agent, the crystallization kinetic data for fluorite were measured in steam ammonia wastewater using batch crystallization and on-line particle monitoring technologies. The crystallization kinetics model parameters were optimized with nonlinear optimization techniques and verified by experimental data. The results showed that the model and model parameters were nice with the average relative error of about 3.37% between the model values and the experimental data. The fluorite precipitation crystallization process was controlled by surface reaction and coalescence phenomenon between fluorite particles happened. Simulation results with the kinetics model indicated that when the initial calcium ion concentration was constant, the higher the initial concentration of fluoride ions, the faster the fluoride ion concentration decline in the initial stage. The initial fluoride ion concentration was too high or too low, eventually they were unfavorable for lower fluoride ion concentration. Appropriate increase in operating temperature may promote fluorine ion purification, however, too high temperature was negative. © All Right Reserved.
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页码：1357 / 1367
页数：10
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  • [1] Meng F.P., Li Y.F., Zhou Y., Et al., Static and dynamic adsorption of fluoride using La (III)-loaded chitosan beads crosslinked with EGDE, CIESC Journal, 62, 11, pp. 3192-3200, (2011)
  • [2] Ankita D., Dinsesh K., Development of a nanoporous adsorbent for the removal of health-hazardous fluoride ions from aqueous systems, Journal of Materials Chemistry A, 3, 8, pp. 4215-4228, (2015)
  • [3] Jamjour R.M.A.Q., New inorganic ion-exchange material for the selective removal of fluoride from potable water using ion-selective electrode, American Journal of Environmental Sciences, 1, 1, pp. 1-4, (2005)
  • [4] Ndiaye P.I., Moulin P., Dominguez L., Et al., Removal of fluoride from electronic industrial effluentby RO membrane separation, Desalination, 173, 1, pp. 25-32, (2005)
  • [5] Katarzyna M.N., Grzegorzek M., Malgorzata K.K., Removal of fluoride ions by batch electro dialysis, Environment Protection Engineering, 41, 1, pp. 67-81, (2015)
  • [6] Gong W.X., Qu J.H., Liu R.P., Et al., Effect of aluminum fluoride complexation on fluoride removal by coagulation, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 395, pp. 88-93, (2012)
  • [7] Nath S.K., Dutta R.K., Fluoride removal from water using crushed limestone, Indian Journal of Chemical Technology, 17, 2, pp. 120-125, (2010)
  • [8] Gogoi S., Nath S.K., Bodoloi S., Et al., Fluoride removal from groundwater by limestone treatment in presence of phosphoric acid, Journal of Environmental Management, 152, pp. 132-139, (2015)
  • [9] Li E.C., Yin T.T., Experimental study on fluoride removal from coking reverse osmosis concentrated water, Metallurgical Powder, 4, pp. 50-53, (2015)
  • [10] Xian Y.H., Experimental study on the treatment process of fluoride wastewater in coal gasification unit, Water Treatment Technology, 41, 4, pp. 116-118, (2015)
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