Fermented Corn Stalk for Biosorption of Copper(II) from Aqueous Solution

Abstract

Corn stalk is the amplest and inexpensive organic material in Heilongjiang province, China. This resource is vicious, causing pollution of the environment. In this present study, an adsorbent is prepared by corn stalk fermentation with Aspergillus niger. The fermentative effects of water content ratio, initial pH medium, temperature, and time were addressed. The analysis of factors and orthogonal experiments revealed that the optimum conditions of producing cellulose were solid-liquid ratio of 1 : 5, temperature 28°C, initial pH, and 72 hours. The modification mechanism was investigated by using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The biosorption capacity of fermented corn stalk was better than that of raw corn stalk under identical conditions, and this improvement can be ascribed to the enzyme system secretion by A. niger under changing the surface properties of the raw corn stalk. Some of the hydroxyl and carboxyl groups are bounded by cellulose which became free hydroxyl and carboxyl groups with a high ability after adsorption of heavy metals.

Study on Macrostructure and Fourier Transform Infrared Spectroscopy of Cornstalk

“…For a long time, cornstalks are usually burned as fuel or processed into silage, fertilizer, etc. [1][2][3]. However, cornstalks contain a large amount of natural fibers.…”

Effect of Microstructure on Mechanical Properties of Cornstalk

“…Corn is the third-largest food crop in the world after rice and wheat. Compared with rice and wheat, corn has more by-products after harvest, and the problems of environmental pollution caused by straw burning, changes in soil moisture caused by re-turning straws to the field, and changes in ground temperature have become major problem that plagues agricultural production [1,2]. Cornstalk is an important renewable biomass resource, which can usually be crushed and further processed into organic fertilizer, silage, etc.…”

Development of bacterial cellulose nanocomposites: An overview of the synthesis of bacterial cellulose nanocomposites with metallic and metallic-oxide nanoparticles by different methods and techniques for biomedical applications

“…By in situ method the reducing agents Ocimum sanctum , Terminalia cattappa , and bio flocculant has been used for cellulose nanocomposite materials with Ag and Cu nanoparticles for antimicrobial characteristics [31, 32]. Copper nanoparticles are considered cost-effective rather than other metallic nanoparticles in the recent study because it shows excellent electrical and thermal characteristics and has wider use on an industrial scale [33].…”

“…Copper nanoparticles are considered cost-effective rather than other metallic nanoparticles in the recent study because it shows excellent electrical and thermal characteristics and has wider use on an industrial scale [33].…”