Da-KGM based GO-reinforced FMBO-loaded aerogels for efficient arsenic removal in aqueous solution

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• 作者：Shuxin Ye^a ; Weiping Jin^a ; Qing Huang^a ; Ying Hu^a ; Yan Li^a ; ^c ; Jing Li^a ; ^b ; ^c ; ^{lijingfood@mail.hzau.edu.cn} ; Bin Li^a ; ^b ; ^c
• 关键词：Da-KGM/GO aerogels ; FMBO ; Arsenic adsorption
• 刊名：International Journal of Biological Macromolecules
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：94
• 期：part_PA
• 页码：527-534
• 全文大小：3622 K
• 卷排序：94

文摘

Composites based on deacetylated konjac glucomannan (Da-KGM) and graphene oxide (GO) aerogels with iron and manganese oxides (FMBO) for effective removal of arsenic from contaminated water. Da-KGM, which was used as supporting composite matrix here, were firstly treated with GO and loaded FMBO. The obtained Da-KGM/GO/FMBO composite aerogels were characterized by compression test, thermo gravimetric analysis (TGA), X-ray diffraction (XRD), fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The characteristic results showed that addition of GO exhibited enhanced mechanical properties towards Da-KGM aerogels. What’s more, results of FTIR indicated the strong intermolecular hydrogen bond interaction between KGM and GO. Batch adsorption tests were used to evaluate arsenic removal capacity. Da-KGM/GO loaded FMBO composite aerogels exhibited high adsorption ability for arsenite [As(III)] and arsenate [As(V)]. The adsorption results showed that the arsenic for both arsenite [As(III)] and arsenate [As(V)] removal process followed a pseudo-second-order rate equation and Langmuir monolayer adsorption. The maximum As(III) and As(V) uptake capacity of Da-KGM/GO(10%)/FMBO composite aerogels reached 30.21 mg g−1 and 12.08 mg g−1 respectively according to Langmuir isotherm at pH 7 and 323 K.