为了研究污泥与杏壳制备生物质炭的工艺条件,以市政污泥和当地农林废弃物杏壳为原料,用3mol/L的氯化锌活化30min,在高温炉中用程序升温于600℃煅烧2h,得到污泥-杏壳基生物质炭。TGA-DTA分析结果表明,污泥-杏壳的最佳热解温度为600℃;XRD分析结果表明,污泥-杏壳基生物质炭表面为石英和正长石相;FT-IR分析结果表明,其表面具有丰富的C—H和CC键。对污泥-杏壳基生物质炭的制备工艺进行了优化,研究了活化剂添加比例、污泥的比例、活化时间和活化温度在吸附过程中对亚甲基蓝吸附量和碘值的影响。实验结果表明,污泥-杏壳基生物质炭制备的最佳工艺为活化剂添加比为1∶4、污泥含量为20%、活化温度为600℃、活化时间为1h,其对亚甲基蓝的吸附量为149.8mg/g、碘值为915.5mg/g。
In order to study the preparation process conditions of biomass charcoal,municipal sludge and local agricultural and agriculture waste apricot shells were used as raw materials,activated with 3mol/L zinc chloride for 30 minutes,then put in a high-temperature furnace at 600℃ for 2 hours,which controlled by a temperature program method,to obtain an adsorbent sludge-apricot shell-based biomass charcoal.Differential thermal-thermogravimetric analysis (TGA-DTA),the thermogravimetric analyzer (SHMADZUDTG-60),X-ray diffraction analysis (XRD) and Fourier infrared spectroscopy (FT-IR) were performed on the sludge-apricot shell-based biomass charcoal.TG-DTA analysis results showed that the best pyrolysis temperature of sludge-apricot shell was 600℃.XRD diffraction results presented that the surface of sludge-apricot shell-based biomass char had quartz and orthoclase phases.FT-IR analysis results indicated that the surface had abundant C—H and C keys.In addition,the preparation process of sludge-apricot shell-based biomass charcoal was optimized,and the effects of activator addition ratio,sludge ratio,activation time,and activation temperature on the amount of methylene blue adsorption and iodine value were studied.The best process condition for the preparation of sludge-apricot shell-based biomass charcoal was determined,that is,the activator addition ratio,the sludge content,the activation temperature and the activation time were 1∶4,20%,600℃,and 1 h,respectively.Under the optimal condition,the adsorption amount of methylene blue reached to 149.8mg/g and iodine value and the iodine value was 915.5mg/g.
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基金资助
西南土地资源评价与监测教育部重点实验室开放基金(TDSYS202110);国家级大学生创新创业训练计划项目(S201910628036)
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