| 闫中亚,王俊芬,吴玉英,张学铭.KOH活化脱墨污泥基活性炭的制备及表征[J].中国造纸学报,2016,31(1):32-36 |
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| KOH活化脱墨污泥基活性炭的制备及表征 |
| Preparation and Characterization of Activated Carbon from Deinking Sludge Activated by Potassium Hydroxide |
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| DOI：10.11981/j.issn.1000-6842.2016.01.32 |
| 中文关键词: 脱墨污泥 污泥基活性炭 碘吸附 结构表征 |
| Key Words:deinking sludge activated carbon iodine adsorption structural characterization |
| 基金项目:北京高等学校“青年英才计划”(YETP0766)。 |
| 作者 | 单位 | | 闫中亚1 | 1.林木生物质化学北京市重点实验室,北京,100083 | | 王俊芬1 | 1.林木生物质化学北京市重点实验室,北京,100083 | | 吴玉英1,2,* | 1.林木生物质化学北京市重点实验室,北京,100083；2.木质材料科学与应用教育部重点实验室,北京,100083 | | 张学铭1,2 | 1.林木生物质化学北京市重点实验室,北京,100083；2.木质材料科学与应用教育部重点实验室,北京,100083 |
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| 中文摘要: |
| 以造纸厂脱墨污泥和木粉为原料,采用KOH活化法制备脱墨污泥基活性炭(以下简称“污泥基活性炭”),以碘吸附值为指标,探讨了污泥基活性炭的最佳制备条件；采用X射线衍射(XRD)和扫描电镜(SEM)等对污泥基活性炭的结构进行表征。结果表明,污泥基活性炭的最佳制备条件为：木粉添加量20%、炭碱比1∶1、活化温度675℃、活化时间75 min；该条件下所制备的污泥基活性炭的碘吸附值达623.44 mg/g；XRD分析表明,污泥基活性炭不规则化程度小,保存了原有的纤维结构；SEM分析表明,污泥基活性炭总体呈分散的短小棒状结构,孔呈蜂窝状致密分布,微孔比例达80.3%。将污泥基活性炭用于处理造纸厂碱抽提段漂白废水的效果显著,当添加量为4 g/L时,废水CODCr、色度和浊度的去除率分别达到63.6%、93.6%和91.6%。 |
| Abstract: |
| Deinking sludge activated carbon was prepared using deinking sludge and wood powder as raw materials and activating by potassium hydroxide. With the iodine adsorption value as evaluation index, the optimum preparation conditions of deinking sludge activated carbon were discussed. The structure of deinking sludge activated carbon was characterized by X-ray diffraction, scanning electron microscopy,etc. The results showed that the optimal preparation conditions of deinking sludge activated carbon were as follows: wood powder ratio 20%, the ratio of carbon to alkali 1∶1, activation temperature 675℃, and activation time 75 min. The iodine adsorption capacity of the deinking sludge activated carbon reached to 623.44 mg/g. The XRD patterns reflected the high crystalline structure of deinking sludge activated carbon due to the original structure of fiber was preserved. Moreover, deinking sludge activated carbon displayed scattered short rod structure under scanning electron microscopy. And the pore on the rod structure existed alveolate distribution, the microporous accounted to 80.3%. The deinking sludge activated carbon was used for treating pulp mill bleaching effluent(E stage), and the effect was remarkable. When the dosage of deinking sludge activated carbon was 4 g/L, the removal rates of CODCr, color and turbidity reached to 63.6%, 93.6% and 91.6% respectively. |
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