污泥基吸附剂制备及对铅离子吸附性能的研究.pdf

Subject :Lead adsorption properties of theadsorbent prepared from sludge Specialty:Environmental Engineering Name :SunDi-li (Signature) Instructor:ZhaoXiao-guang (Signature) ABSTRACT The research took the dewatered sludgeas raw material,adding proper blast furnace slag as additive, to make sludge-based adsorbentin high temperature and optimal process conditionswere chosen through orthogonal experimentand single factor of the adsorbentwas tested with simulative wastewater from laboratory. In order to study the absorption mechanism,electron microscope scanning, infrared spectrum and adsorption icsanalysiswere used. (1)Preparation technology. The preparationconditions were chosen through orthogonal experimentand single factor experiment. The pyrolysis temperaturewas500℃,The ratioof dewatered sludgeand blast furnace slagwas 6:4, the particle sizewas about the pyrolysis timewas . The iodine number of the sludge-based adsorbentwas mg/g. Its yieldwas % and specific surface areawas 2/g. (2)Performance analysis. The adsorbentwas used to treatthe simulatedheavy metal wastewater. The removal rateof the sludge-based adsorbentto Pb 2+was increasing with the time, pH and the increase of dosing it tended to removal rateof the sludge-based adsorbentto Pb 2+could get % in a condition of that the temperaturewas 25℃,pH was 5,initial concentrationof Pb 2+was 40mg/L, absorber dosage was 3g/L, absorbertime was 60min. (3)Mechanism surface characteristic analysis, infrared spectrumand pore characteristics analyzerto analyses the adsorbent which made under proper preparation conditions. The results show that thesurface of the sludge-based adsorbent was pore structurewas clear. The infrared spectrumshowthat the abso