Citation: Han CHEN, Chun-Hua WU, Yi HUANG, Hua-Hua WU, Jie PANG. A Study on the Preparation of Konjac Glucomannan-silk Fibroin Composite Aerogels and Its Adsorption of Water Pollutant Cr(Ⅲ)[J]. Chinese Journal of Structural Chemistry, ;2021, 40(1): 23-30. doi: 10.14102/j.cnki.0254–5861.2011–2774 shu

A Study on the Preparation of Konjac Glucomannan-silk Fibroin Composite Aerogels and Its Adsorption of Water Pollutant Cr(Ⅲ)

Han CHEN ^{a, e} ,
Chun-Hua WU ^{a, b, c, d,,} ,
Yi HUANG ^e ,
Hua-Hua WU ^e ,
Jie PANG ^{a, b, c, d,,}

a.
Engineering Research Centre of Fujian-Taiwan Special Marine Food Processing and Nutrition, Ministry of Education, Fuzhou 350002, China
b.
State Key Laboratory of Food Safety Technology for Meat Products, Xiamen 361100, China
c.
College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
d.
Key Laboratory of Marine Biotechnology of Fujian Province, Institute of Oceanology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
e.
Fujian University of Technology, Fuzhou 350118, China

Corresponding author: Chun-Hua WU, chwu0283@163.com Jie PANG, pang3721941@163.com
Received Date: 21 February 2021
Accepted Date: 16 March 2021

Fund Project: the National Natural Science Foundation of China 31471704the National Natural Science Foundation of China 31772045

Figures(6)

It is emergent to develop a green waste water adsorbent with high efficiency. Therefore, a type of low-cost, green and environmentally friendly konjac glucomannan (KGM) -silk fibroin (SF) composite aerogels were compounded via simple chemical grafting and vacuum freeze drying, and a study on its adsorption capacity was also conducted. The characterizations of FT-IR, SEM, XRD and DSC indicate that the modified aerogels show a porous network space structure and there is a strong hydrogen bond effect between the KGM and SF molecules, which improves the density, compressive strength and thermal stability of aerogel materials. The adsorption experiments show that KGM-SF aerogels can effectively adsorb the water pollutants Cr(Ⅲ) with a maximal adsorption capacity of 82 mg·g^-1. In addition, the adsorption isotherm and dynamic model analysis are used to elaborate the adsorption mechanism of KGM-SF aerogels and explain that the composite aerogels can be single molecule chemisorption. KGM-SF aerogels have potential adsorption capacity.
- konjac glucomannan,
- silk fibroin,
- aerogel,
- adsorption,
- Cr(Ⅲ)
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