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OALib Journal期刊
ISSN: 2333-9721
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废轮胎热解炭吸附性能研究
DOI: 10.3969/j.issn.1000-2006.2014.06.025, PP. 130-134
Keywords: 废轮胎,热解炭,未活化吸附性能,商业活性炭
Abstract:
研究了粒径为40～400μm废轮胎颗粒在450～800℃条件下,以15～40℃/min升温速率经0.5～2h进行热解获得的热解炭对亚甲基蓝、腐殖酸、苯酚和cu2+的吸附能力,考察了不同热解条件对其吸附能力的影响,探讨了吸附剂用量、初始浓度、ph、温度、时间对吸附能力的影响。研究结果表明,热解条件对吸附能力的影响排序为温度>时间>粒径>升温速率。400μm胶粉以40℃/min升温速率,在800℃条件下热解1.5h,所获得的热解炭不经活化,其比表面积sbet可达114m2/g,能有效吸附cu2+、亚甲基蓝和腐殖酸,但对苯酚的吸附能力较弱,对cu2+、亚甲基蓝和腐殖酸的适宜吸附条件分别为热解炭投加量分别为1、2、1.5g/l,平衡吸附时间分别为2、1、3h,吸附质初始浓度分别为120、100、6mg/l,ph分别为4.5～6、1.0、8.0。未经活化的废轮胎热解炭可作为商业活性炭的廉价替代品,其适宜的吸附质为重金属及较大分子类型的有机物。
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