Zhang Jian, Shi Qianqian, Zhang Chenglu, Xu Jingtao, Zhai Bing, Zhang Bo
School of Environmental Science and Engineering, Shandong University, Jinan 250100, China.
Bioresour Technol. 2008 Dec;99(18):8974-80. doi: 10.1016/j.biortech.2008.05.018. Epub 2008 Jul 2.
Activated carbon was prepared from an inexpensive and renewable carbon source, Typha orientalis, by H(3)PO(4) activation and then impregnated with different Mn salts and tested for its Neutral Red (NR) adsorption capacities. The amount of Mn impregnated in the activated carbon was influenced by the anion species. Impregnation with Mn decreased the surface area, changed the pore size and crystal structure, and introduced more acidic functional groups such as carboxyl, lactone and phenol groups. The optimum adsorption performance for all the activated carbons was obtained at pH 3.7, Mn-Carbon dose of 0.100g/100ml solution and contact time 4.5h. The adsorption isotherms fit the Langmuir isotherm equation. The kinetic data followed the pseudo-second-order model. The thermodynamic parameters indicated that the processes were spontaneous and endothermic. According to these results, the prepared Mn modified activated carbons are promising adsorbents for the removal of Neutral Red from wastewater.
以廉价且可再生的碳源香蒲为原料，通过磷酸活化制备活性炭，然后用不同的锰盐进行浸渍，并测试其对中性红（NR）的吸附能力。浸渍在活性炭中的锰含量受阴离子种类的影响。用锰浸渍会降低比表面积，改变孔径和晶体结构，并引入更多酸性官能团，如羧基、内酯基和酚基。所有活性炭在pH 3.7、锰 - 碳剂量为0.100g/100ml溶液以及接触时间为4.5小时时获得最佳吸附性能。吸附等温线符合朗缪尔等温线方程。动力学数据遵循准二级模型。热力学参数表明这些过程是自发的且吸热的。根据这些结果，制备的锰改性活性炭是从废水中去除中性红的有前景的吸附剂。
