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. Shenzhen Hazardous Waste Treatment Station Co. Ltd., Shenzhen 518049, China) Abstract: Fluoride in waste acid was removed by precipitation process with waste residue and dust containing lead oxide... words: Pb2+-F--H2O system; acidic wastewater; lead fluoride; thermodynamics 铅冶炼厂烟气制酸过程中会产生大量的污酸,污酸中氟的质量浓度约1 g/L,高的可达3~5 g/L[1],这对污酸的循环使用以及处理排放都造成重大困难.目前,大部分铅冶炼厂均采用石灰沉淀法处理[2-3],也有的采用电石渣,石灰石等物料进处理[4],其......
elements to human health. These metals are widely spread in the acidic environment because of the anthropogenic activities, and cause adverse health effects. Currently, chemical precipitation...) concentration increasing from 5 to 20 g/L, while the precipitation efficiency in heavy metals added abiotic treatment is only 28.14%, 37.00% and 39.22% correspondingly. The acidic environment (pH<......
that the mica of siliceous shale containing vanadium transforms into the molten particle containing different elements. NaCl and Na2SO4 promote the generation of soluble potassium salt and the crystallization... on precipitation of crystal-forming fervanite from vanadium leaching solution[J]. Hydrometallurgy of China, 2010, 29(3): 171-175. [14] 阳亚玲, 颜文斌, 华骏, 等. 含钒浸出液除硅试验研究[J]. 非金属矿, 2015, 38(2): 8-10. YANG......
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) was researched to ascertain the conditions of producing minimum precipitation. The effects of salt concentration and pH on the characteristics of jarosite formed in K2SO4/(NH4)2SO4-FeSO4 inorganic salt... to that in 9K medium. Table 1 Precipitation of jarosite in different salt solutions 3.2.2 9K medium A. ferrooxidans strain YTW inoculants were also obtained from the late logarithmic growth phase......
Synthesis and Characterization of Y-Doped Mesoporous CeO2 Using A Chemical Precipitation Method Xu Dayu1,Qiu Guanzhou1,Li Yukun1,Jiang Nan1,Song Xiaolan1 (1.Department of Inorganic Materials... as the cerium resource, yttrium nitrate as the yttrium resource, and ammonium carbonate as the precipitating agent, mesoporous CeO2 powders doped with different yttrium contents were successfully synthesized......
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Analysis of the formation conditions and characteristics of interphase and random vanadium precipitation in a low-carbon steel during isothermal heat treatmentSayed Ghafar Hashemi,B.EghbaliDepartment... parameters. The effects of characteristics of vanadium precipitates formed during isothermal heat treatment on the hardness of the ferrite matrix in low-carbon vanadium-alloyed steel were investigated through......
Effects of Na4EDTA and EDTA on seeded precipitation of sodium aluminate solution L? Bao-lin(吕保林), CHEN Qi-yuan(陈启元), YIN Zhou-lan(尹周澜), HU Hui-ping(胡慧萍) School of Chemistry and Chemical... ____________________________________________________________________________________________ Abstract: Na4EDTA and EDTA were adopted as new additives to intensify the seeded precipitation process of sodium aluminate solution. The effects of the two additives at certain concentrations......
Steel Vanadium Titanium, 2005, 26(3): 12–16. (in Chinese) [10] WANG Zhen-qiang, MAO Xin-ping, YANG Zhi-gang, SUN Xin-jun, YONG Qi-long, LI Zhao-dong, WENG Yu-qing. Strain-induced precipitation...J. Cent. South Univ. (2017) 24: 2767-2772 DOI: https://doi.org/10.1007/s11771-017-3690-7 Precipitation behavior of Ti in high strength steels WU Si-wei(吴思炜), LIU Zhen-yu(刘振宇), ZHOU Xiao-guang(周晓光......
