A Simple Low-Cost Method to Prepare Lignocellulose-Based Composites for Efficient Removal of Cd(II) from Wastewater
A Simple Low-Cost Method to Prepare Lignocellulose-Based Composites for Efficient Removal of Cd(II) from Wastewater
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一种简单低成本的制备木质纤维素基复合材料的方法，用于有效去除废水中的镉（II）
DOI：
10.3390/polym11040711
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发表时间：
2019-04
期刊：
影响因子：
5
通讯作者：
Cai Gaotang
中科院分区：
文献类型：
--
作者：
Wen Yingying;Ji Yong;Zhang Shifeng;Zhang Jie;Cai Gaotang
木质纤维素具有多孔介孔结构，可作为一种绿色分离/吸附材料，因此其功能材料的制备受到广泛关注。在这项研究中，表面功能化的木质纤维素基吸附剂的镉（II）离子的高效捕获制备通过简单的原位共沉积木材废弃物衍生的锯粉（SP）在单宁酸（TA）和氨丙基三乙氧基硅烷（APTES）混合水溶液的存在下。首先用TA-APTES涂层对SP进行修饰，合成功能性SP底物（SP-（TA-APTES））。SP-（TA-APTES）杂化物充当反应性平台，由于TA-APTES层的突出的二次反应，其使得能够用富含氨基的聚乙烯亚胺（PEI）进一步修饰。采用傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）、X射线衍射（XRD）、热重分析（TGA）和扫描电子显微镜（SEM）对SP-（TA-APTES）-PEI（SP-TAPI）复合材料的表面形貌进行了研究。值得注意的是，木质纤维素骨架，层-颗粒结构，和混合涂层的综合优势有助于增强吸附能力的Cd（II）（高达22.66 mg/g，pH = 5.0）。这种去除能力高于大多数报道的农业废物为基础的或木质纤维素为基础的材料。研究了表面改性SP-TAPI复合材料对Cd（II）的吸附机理。这些结果提供了新的见解高附加值利用农业废物的水净化应用。
The fabrication of functional lignocellulose-based materials has drawn considerable attention because it acts as a green separation/absorption material owing to its multi-porous mesostructure. In this study, a surface functionalized lignocellulose-based adsorbent for the highly efficient capture of Cd(II) ions was prepared through facile in situ co-deposition of wood waste-derived saw powder (SP) in the presence of tannic acid (TA) and aminopropyltriethoxysilane (APTES) mixed aqueous solution. The SP was first modified using TA-APTES coating to synthesize the functional SP substrate (SP-(TA-APTES)). The SP-(TA-APTES) hybrids served as reactive platforms, which enabled further decoration with amino-rich polyethylenimine (PEI) due to the outstanding secondary reactions of the TA-APTES layer. The surface morphology of the resulting SP-(TA-APTES)-PEI (SP-TAPI) composites were investigated using Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). Significantly, the combined advantages of the lignocellulosic skeleton, the layer-particle structure, and the hybrid coating contributed to the enhanced adsorption capacity of Cd(II) (up to 22.66 mg/g at pH = 5.0). This removal capacity was higher than that of most reported agricultural waste-based or lignocellulose-based materials. The Cd(II) adsorption mechanism of the surface-modified SP-TAPI composites was studied in detail. These results provide new insights into the high value-added utilization of agricultural waste for water purification applications.
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影响因子：
8.3
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
8.4
作者：
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通讯作者：
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影响因子：
5.7
作者：
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