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利用碱湿法球磨改性固硫灰吸附Mn~(2+),考察了Na OH掺量、球磨转速和球磨时间对固硫灰吸附Mn~(2+)的影响,并结合SEM、XRD和IR研究碱湿法球磨对固硫灰的改性及吸附机制。结果表明,当Na OH掺量50%,球磨转速525 r/min,球磨时间60 min时,改性固硫灰的单位吸附量达到最大值27.45 mg/g。SEM分析表明改性固硫灰比表面积大幅提高,粒度明显变小,孔平均直径显著增大。XRD分析结果表明固硫灰在改性过程中有远程无序凝胶生成,对Mn2+有物理包裹作用;固硫灰在碱湿法球磨改性过程中生成了钙矾石、斜方钙沸石晶相,有利于提高固硫灰的吸附性能。FT-IR分析表明改性固硫灰对Mn~(2+)的吸附过程主要为物理吸附,并伴随化学吸附。
Adsorption of Mn ~ (2+) by alkaline wet milling modified sulfur fixation ash was studied. The effects of NaOH dosage, milling speed and milling time on the adsorption of Mn ~ (2+) by sulfur fixation ash were investigated. SEM, XRD and IR Study on Modification and Adsorption Mechanism of Sulfur-Containing Sulfur by Wet Ball Milling. The results showed that the unit adsorption capacity of modified sulfur - fixing ash reached 27.45 mg / g when NaOH content was 50%, milling speed was 525 r / min and ball milling time was 60 min. The SEM analysis showed that the specific surface area of the modified solid sulfur increased significantly, the particle size obviously decreased and the average pore diameter increased significantly. The results of XRD showed that there was a long-range disordered gel in the process of sulfur fixation and a physical wrapping effect on Mn2 +. During the process of alkaline wet ball milling, the sulfur-fixing ash produced ettringite, rhombohedral calcium zeolite crystals Phase, help to improve the adsorption capacity of sulfur-fixing ash. FT-IR analysis showed that the adsorption of Mn 2+ by the modified sulfur-fixing ash was mainly physical adsorption and accompanied by chemical adsorption.