摘要
吸附染料后的废弃Mg(OH)2/AC复合材料经高温焙烧得到MgO/AC复合材料,研究了制备MgO/AC的最佳焙烧条件,采用差热-热重、BET比表面积测定、X射线衍射(XRD)等技术对其进行表征,考察了MgO/AC对弱酸性艳蓝RAWL的吸附及再生性能.结果表明,伪二级动力学和Langmuir模型更适合描述MgO/AC对弱酸性艳蓝RAWL的吸附过程.4次再生后的MgO/AC对弱酸性艳蓝RAWL吸附能力仍可达到新鲜MgO/AC的1.08倍,是新鲜Mg(OH)2/AC吸附能力的2.11倍,为印染废水处理提供了廉价高效的吸附剂.
The optimum conditions of the preparation of MgO/AC from the high temperature calcination ofMg （OH）2/AC which was a waste from dyeing wastewater was studied. The MgO/AC product was characterized by the thermogravimetry- differential thermal analysis （TG-DTA）, brunaner-emmett-teller （BET）, and X-ray diffraction （XRD）. The adsorption ability of weak acid brilliant blue RAWL on fresh MgO/AC and after regeneration was tested. It was showed that Pseudo-second-order model and Langmuir model fired the adsorption of the RAWL on MgO/AC at 293 - 313K. After 4times of regeneration, the adsorption capacity of MgO/AC was 1.08 times higher than the fresh MgO/AC, and 2.11 times higher than the fresh Mg （OH）2/AC.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2014年第2期390-395,共6页
China Environmental Science
基金
国家自然科学基金项目(20477041)
