本文關(guān)鍵詞：污泥基吸附劑對鄰苯二甲酸二甲酯（DMP）吸附性能研究　出處：《廣州大學》2016年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 鄰苯二甲酸二甲酯 污泥基吸附劑 吸附 解吸附

【摘要】：隨著社會的發(fā)展和城市用水量的增加,污水處理廠排放污泥的數(shù)量越來越多,但現(xiàn)有的污泥處理方法和能力導致“污泥圍城”的現(xiàn)象越來越嚴重。本研究提出以污泥作為原材料,通過化學活化法制備污泥基吸附劑,并用于鄰苯二甲酸二甲酯(Dimethyl phthalate,DMP)的吸附。本文通過比表面積分析儀、掃面電子顯微鏡(Scanningelectron microscopy,SEM)、傅里葉變換紅外光譜儀(Fourier transform infrared red,FT-IR)、Boehm滴定法、X-射線衍射光譜儀(X-ray diffraction,XRD)、同步熱分析儀系統(tǒng)地對原始污泥和污泥基吸附劑的物理和化學特性進行對比分析。本文考察了污泥基吸附劑投加量、溶液pH值、吸附時間、溫度和DMP初始濃度對DMP吸附效果的影響。結(jié)果表明:在吸附劑投加量4 g/L、pH=6、吸附時間2 h、DMP初始濃度1000 mg/L時,污泥基吸附劑對DMP的去除率為92.73%。通過動力學和吸附等溫線研究可知,DMP吸附過程符合準二級動力學模型和Freundlich吸附等溫線模型。本文還通過孔隙分布和表面相互作用(π-π鍵、氫鍵)對DMP吸附機理進行深層次的剖析,從而進一步了解污泥基吸附劑對DMP的吸附過程。本文采用化學再生法考察了再生時間、再生液濃度對飽和吸附劑再生附效果影響。結(jié)果表明,在再生時間2 h、再生液濃度1 mol/L時,DMP析出量大于230 mg/g。通過再生吸附劑的重復使用性實驗可知,經(jīng)過化學再生后的飽和吸附劑具有良好的重復使用性,重復使用7次后DMP去除率仍80%以上。通過安全性分析可知,原始污泥及其吸附劑中主要重金屬含量和它們的浸出液濃度均低于最高允許濃度值,因此本實驗所制備的污泥基吸附劑應用于污廢水處理是安全可行的。
[Abstract]:With the development of society and the increase of urban water consumption, the quantity of sludge discharged from sewage treatment plant is increasing. However, the existing sludge treatment methods and capacity lead to more and more serious phenomenon of "sludge besieging". In this study, sludge is used as raw material to prepare sludge based adsorbent by chemical activation method. And used for the adsorption of dimethyl phthalate dimethyl phthalate DMP.The specific surface area analyzer was used in this paper. Scanning electron microscope (SEM). Fourier transform infrared red FT-IRT / Boehm titration method is used in Fourier transform infrared spectrometer. X-ray diffractometry (XRD). The physical and chemical properties of raw sludge and sludge based adsorbent were systematically analyzed by simultaneous thermal analyzer. The dosage of sludge based adsorbent, the pH value of solution and the adsorption time were investigated in this paper. The effect of temperature and initial concentration of DMP on the adsorption of DMP was studied. The results showed that the adsorption time was 2 h when the adsorbent dosage was 4 g / L ~ (-1) pH ~ (-1) ~ (6). When the initial concentration of DMP was 1 000 mg/L, the removal rate of DMP by sludge based adsorbent was 92.73. The kinetics and adsorption isotherm were studied. The adsorption process of DMP is in accordance with the quasi-second-order kinetic model and the Freundlich adsorption isotherm model. The pore distribution and surface interaction (蟺-蟺 bond) are also used in this paper. The adsorption mechanism of DMP was deeply analyzed to further understand the adsorption process of DMP by sludge based adsorbents. The regeneration time was investigated by chemical regeneration method. The results showed that the regeneration time was 2 h and the regeneration solution concentration was 1 mol/L. The amount of DMP precipitates is more than 230mg / g. The reusability experiment of regenerative adsorbent shows that the saturated adsorbent after chemical regeneration has good reusability. The DMP removal rate was still more than 80% after 7 times of repeated use. According to the safety analysis, the main heavy metals in the original sludge and its adsorbent and the concentration of their leachate were lower than the maximum allowable concentration. So it is safe and feasible to use sludge-based adsorbent in wastewater treatment.
【學位授予單位】：廣州大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：X703

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