Institute of Chemicobiology and Functional Materials, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing 210094, China.
Institute of Chemicobiology and Functional Materials, School of Chemical Engineering, Nanjing University of Science and Technology, 200 Xiao Ling Wei, Nanjing 210094, China.
Carbohydr Polym. 2019 Oct 15;222:115017. doi: 10.1016/j.carbpol.2019.115017. Epub 2019 Jun 22.
Water purification has always being an imperative but challenging issue of our times. Here, we used an organic-inorganic material, i.e. bacterial cellulose (BC) and Ca-montmorillonite (Ca-MMT) composites to treat complex wastewater. The surface and inside of the BC/Ca-MMT was a microporous structure capable of providing abundant adsorption sites. We demonstrated the BC/Ca-MMT has superior removal efficiency towards methylene blue (MB) and tetracycline (TC). Typically, the sample showed significant uptake ability towards MB and TC with uptake characteristics of pseudo-second-order model and Langmuir isotherm model. More interestingly, in MB-TC binary system, the removal of the two contaminative species was hardly affected by other coexisting components. Meanwhile, the sample was ease of regeneration and kept stable reusability through consecutive four recycles. With more virtues, such as low cost and wide range of resources of the two raw materials, the BC/Ca-MMT is expected to be a promising versatile water purifier in sewage treatment.
水的净化一直是我们这个时代的当务之急，但也是一个具有挑战性的问题。在这里，我们使用了一种有机-无机材料，即细菌纤维素（BC）和钙蒙脱石（Ca-MMT）复合材料来处理复杂的废水。BC/ Ca-MMT 的表面和内部是一种微孔结构，能够提供丰富的吸附位点。我们证明了 BC/ Ca-MMT 对亚甲基蓝（MB）和四环素（TC）具有优异的去除效率。通常，该样品对 MB 和 TC 表现出显著的吸附能力，符合准二级动力学模型和 Langmuir 等温吸附模型。更有趣的是，在 MB-TC 二元体系中，两种污染物的去除几乎不受其他共存成分的影响。同时，该样品易于再生，并通过连续四次循环保持稳定的可重复使用性。由于这两种原材料具有成本低、资源广泛等优点，BC/ Ca-MMT 有望成为一种有前途的、通用的污水处理水净化器。
