School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning, 437100, China.
State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.
Environ Sci Pollut Res Int. 2020 Jul;27(19):24558-24567. doi: 10.1007/s11356-020-08712-5. Epub 2020 Apr 20.
Quaternary ammonium salt type cotton linter (QCL) was synthesized by radiation grafting of dimethylaminoethyl methacrylate (DMAEMA) onto cotton linter and subsequent quaternization. Batch and column adsorption experiments were used to evaluate the adsorption behaviors of the QCL for phosphate. The adsorption kinetics of QCL for phosphate were well obeyed pseudo-second-order mode. The adsorption isotherms were well fitted by Langmuir, Temkin, and Dubinin-Radushkevich model. Column experiments showed that the breakthrough curves were dependent on the inlet concentration and flow rate but independent on space velocity. Moreover the QCL can be effectively regenerated for further repeated use at least 10 cycles. And QCL exhibited good selective adsorption for phosphate. Such high adsorption and desorption efficiency of QCL made it employing for phosphate adsorption in practical application.
季铵盐型棉短绒（QCL）是通过棉短绒上接枝甲基丙烯二甲胺（DMAEMA）并随后季铵化而合成的。采用批量和柱吸附实验来评估 QCL 对磷酸盐的吸附行为。QCL 对磷酸盐的吸附动力学很好地遵循拟二级模式。吸附等温线很好地符合朗缪尔、坦金和杜宾-拉什科夫模型。柱实验表明，穿透曲线取决于入口浓度和流速，但与空间速度无关。此外，QCL 可以有效再生，至少可重复使用 10 次。并且 QCL 对磷酸盐表现出良好的选择性吸附。QCL 具有如此高的吸附和解吸效率，使其在实际应用中可用于磷酸盐的吸附。
