Preparation of cellulose derived from corn stalk and its application for cadmium ion adsorption from aqueous solution

Preparation, characterization of corn stalk xanthates and its feasibility for Cd (II) removal from aqueous solution

“…4 showed the CP/MAS 13 C NMR spectra of RCS and XMCS. The signals of cellulose in RCS at 60-70 ppm are attributed to C-6, 70-80 ppm to C-2, C-3 and C-5, 80-90 ppm to C-4 and 98-110 ppm to C-1 [4]. In particular, the peak at 85-90 ppm is assigned to the crystalline region, while at 80-85 ppm is for the crystal surface or the disordered constituent.…”

“…At much higher exposure levels, cadmium intoxication suggests a link to cancer [3] and death. Therefore, Cd (II) concentrations in the drinking water guideline values recommended by World Health Organization (WHO) and China are 0.003 and 0.005 mg/L, respectively [4]. It is essential to remove excessive cadmium concentrations from aqueous environments prior to its discharge.…”

“…Fortunately, chemical modification can be carried out to destroy these hydrogen bonds, in order to make -OH groups at C-6, C-2 and C-3 become more reactive to attach other functional groups, and vary better adsorptive properties [6]. In our previous research, we have focused on modified corn stalk to produce several useful adsorbents for Cd (II), such as corn stalk modified by acrylonitrile [11], corn stalk grafted with acrylonitrile [9], and cellulose isolated from corn stalk [4]. Recently, some researches have been done for cellulose xanthates prepared from Eichhornia crassipes, showing more promising for the removal of Pb (II) [12], and Cu (II) [13], which provides a tentative method for the modification of corn stalk.…”

The Potential Use of Cassava Peel for Treatment of Mine Water in Mozambique

“…The cellulosic adsorbents that have been used for metal removal are rice husk [37], banana peel [38], wheat straw [39], grape bagasse [40], corn stalk [41], coir pith [42], bel fruit shells [43], corn cob [44], and hemp fibers [45]. The majority of cellulosic waste is constituted by cellulose, hemicelluloses and lignin.…”

Fingerprints of Phalaenopsis Tissues in Growth and Spike Induction Periods—A Solid‐state 13C NMR Approach

“…[15][16][17][18][19][20][21] By taking advantage of the broad chemical shift dispersion in 13 C and the normally short T 1 relaxation time in 1 H nuclei, { 1 H}/ 13 C cross-polarization combined with magic-angle spinning (CP/MAS) spectroscopy 22,23 has been routinely applied to insoluble synthetic polymers and natural products to study their morphologies, local conformations, and dynamic properties. [24][25][26][27][28] In plant studies, solid-state NMR techniques have been used to study the effects of hydration on the mobility of polysaccharides in the onion cell-wall 29 and to obtain structural information on young bamboo plants (Phyllostachys pubescens). 30 It has been…”