DMO-M金属氧化物制备及对铬深度去除的研究

Preparation of Metallic Oxide DMO-M and the Chromium Removing Research Completely in Complex State

以制革废水中难以碱沉淀的铬为研究对象,以多金属鞣制模拟液为原料制备金属氧化物吸附材料对铬深度去除进行研究。配置不同配比的锆、铝、钛(Zr、A1、Ti)多金属模拟液,采用共沉淀-烧结法制备Al-Ti、A1-Zr、Zr-Ti双金属氧化物(DMO-M)。研究表明:750℃制备的DMO-M(Al-Zr)体系中生成了Al-Zr双质氧化物,温度升高至900℃,双质氧化物消失;DMO-M可以去除CA-Cr,DMO-M(Al-Zr)去除能力最佳;在DMO-M体系中Al离子有助于吸附,Zr离子具有高效选择吸附性。采用综合热分析(TG-DSC)、比表面积(BET)、X射线衍射(XRD)、扫描电子显微电镜(EDS-SEM)对DMO-M进行表征。

Complexed chromium which was difficult to alkaline precipitation in tanning wastewater was researched in this paper, and metallic oxide adsorption materials were prepared by multi-metal tanning solution and their removing capacities were also tested. Multi metallic simulated solutions with different ratios of Zr, Al, Ti were configurated, then double metal oxide （DMO-M） Al-Ti,Al-Zr, Zr-Ti were prepared by copreeipitation-sintering method. The results showed that： double quality oxides of Al-Zr in DMO-M （Al-Zr） preparing at 750 ℃ were generated, and double quality oxides were disappeared when temperature was elevated to 900 ℃; CA-Cr could be removed by DMO-M and DMO-M （Al-Zr） had better removing capacity; Al irons in DMO-M system were contributed to adsorb, and Zr irons had high selective adsorption capacities. Integrated thermal analysis （TG-DSC）, the specific surface area （BET）, X-ray diffraction （XRD） and energy dispersive spectrometer -scanning electron microscopy （EDS-SEM） were adopted to characterize for DMO-M.