Fabrication of magnetic lignosulfonate using ultrasonic-assisted in situ synthesis for efficient removal of Cr(VI) and Rhodamine B from wastewater
Fabrication of magnetic lignosulfonate using ultrasonic-assisted in situ synthesis for efficient removal of Cr(VI) and Rhodamine B from wastewater
复制标题
DOI：
10.1016/j.jhazmat.2019.04.086
复制
发表时间：
2019-08-05
影响因子：
13.6
通讯作者：
Chang, Jianmin
中科院分区：
文献类型：
--
作者：
Geng, Jing;Gu, Fei;Chang, Jianmin
开发了一种新型的、环保的一步法制备具有高性能废水处理性能的磁性木质素磺酸盐。采用FTIR、XRD、SEM、TEM、VSM等手段对合成的MIS进行了表征。结果表明，MIS在外加磁场中具有良好的磁性，饱和磁化强度可达43.98 emu/g。此外，MIS对Cr (VI) （57.14 mg/g）和罗丹明B （22.47 mg/g）具有良好的吸附性能。同时，吸附动力学和等温线实验表明，所得数据符合拟二阶模型和Langmuir模型。经过5次再生循环后，Cr（VI）和罗丹明B的解吸效率分别达到70%和85%以上。因此，磁性木质素磺酸盐作为一种高吸附性和可循环利用的吸附剂，是去除废水中金属离子和阳离子污染物的一种很有前途的材料。
A novel and eco-friendly one-step approach has been developed to fabricate magnetic lignosulfonate (MIS) with high performance in wastewater treatment. The obtained MIS was characterized by FTIR, XRD, SEM, TEM, VSM. The results showed that MIS had a good magnetic behavior in an applied magnetic field and its saturation magnetization intensity was up to 43.98 emu/g. Moreover, MIS exhibited excellent adsorption properties for Cr (VI) (57.14 mg/g) and Rhodamine B (22.47 mg/g). Simultaneously, the adsorption kinetics and adsorption isotherm experiments indicated that the data was agreed well with the pseudo-second-order and Langmuir model, respectively. After five regeneration cycles, the desorption efficiencies of Cr(VI) and Rhodamine B could reach more than 70% and 85%, respectively. Hence, the magnetic lignosulfonate is a promising material as a highly adsorptive and recyclable adsorbent for removing metal ions and cationic pollutants in wastewater.