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Open AccessArticle

A Simple Low-Cost Method to Prepare Lignocellulose-Based Composites for Efficient Removal of Cd(II) from Wastewater

College of Water Conservancy and Ecological Engineering, Nanchang Institute of Technology, Nanchang 330099, China
Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing 100083, China
Author to whom correspondence should be addressed.
Polymers 2019, 11(4), 711;
Received: 17 February 2019 / Revised: 12 April 2019 / Accepted: 14 April 2019 / Published: 18 April 2019
(This article belongs to the Special Issue Environmentally Sustainable Polymers)
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. View Full-Text
Keywords: wood waste; lignocellulose composites; PEI; coating; adsorption wood waste; lignocellulose composites; PEI; coating; adsorption
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MDPI and ACS Style

Wen, Y.; Ji, Y.; Zhang, S.; Zhang, J.; Cai, G. A Simple Low-Cost Method to Prepare Lignocellulose-Based Composites for Efficient Removal of Cd(II) from Wastewater. Polymers 2019, 11, 711.

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