采用焙烧酸处理成功制备了酸化硅酸镁吸附材料,通过傅里叶红外(FT-IR)、扫描电镜(SEM)和全自动化表面积和孔结构分析仪等手段对样品结构进行表征;研究了酸化硅酸镁的吸附性能,考察了吸附剂加量、pH值、温度和时间等因素对稠油污水中有机物的吸附影响.结果表明,酸化处理改变了硅酸镁表面晶体结构,微孔数量与比表面积增加;强化了硅酸镁对稠油污水的有机物吸附,将同浓度的COD去除率从52.94%提高到76.12%;吸附剂的吸附能力随温度的升高而降低;强酸或强碱性条件下有利于对稠油污水中有机物的吸附;吸附0.5 h,COD去除率可达65.58%.
The acidified magnesium silicate was successfully prepared by process of roasting acidifying.The resulting acidified magnesium silicate was characterized by Fourier transform infrared spectrometer (FT-IR), scanning electron microscope (SEM) and fully auto surface area analyzer.Adsorption properties and different factors affecting the adsorption for the organic matter in heavy oil wastewater, i.e.dose of adsorbent, pH, temperature and time were studied.Results showed that the number of micro pores and the specific surface area of magnesium silicate greatly increased with the crystal form changed.The process of roasting acidifying for magnesium silicate enhanced the adsorption of the organic matter in heavy oil wastewater by the virtue of enhancing its COD reduction from 52.94% to 76.12%.Higher COD reduction was achieved at lower temperatures.At 20 ℃, it was favorable for the adsorption under strong acidic or strong alkaline conditions and COD removal efficiency was attained 65.58% by adsorption process in 0.5 h.
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