Purification of Lignocellulose Hydrolysate by Org-Attapulgite/(Divinyl Benzene-Styrene-Methyl Acrylate) Composite Adsorbent

Abstract

The purification of lignocellulose hydrolysate is crucial for the efficient conversion of lignocellulose. In this study, weak polar poly(styrene-divinyl benzene-methyl acrylate) (PSDM) and composite absorbent orgattapulgite/poly(styrene-divinyl benzene-methyl acrylate) (PSDM-T) were prepared in situ by suspension polymerization for the detoxification of mixed hydrolysate. The org-attapulgite (O-A-T) used was functionalized with the silane coupling agent KH-570. The effect of O-A-T mass on PSDM-T was investigated. The results showed that the addition of a moderate mass of O-A-T improved the pores of PSDM-T and adsorption abilities. Furfural and 5-HMF (FS), total weak acids (WA), and soluble lignin (SL) were removed simultaneously. The adsorption capacities of PSDM-T for FS, WA and SL were 37.5 mg/g, 34.3 mg/g, and 87.7 mg/g, respectively. Correspondingly, their removal extents (R) were 72.6%, 18.1%, and 52.3%. The adsorption abilities of the PSDM-T for mixed hydrolysate was better than AB-8 (a commonly-used adsorption resin). The total decolorization rates (D) greater than 63%. The absorption property retains high adsorption activity after two cycles.

Controllable Synthesis of Styrene-divinylbenzene Adsorption Resins and the Effect of Textural Properties on Removal Performance of Fermentation Inhibitors from Rice Straw Hydrolysate

“…The concentrations of ASL in the hydrolysate were determined according to the National Renewable Energy Laboratory (NREL) analytical procedures . The decoloration of the hydrolysate was analyzed using an UV–vis spectrophotometer (SP-752, Shanghai Spectrum Instrument CO., Ltd., Shanghai, China) according to our previous study …”

“…23 The decoloration of the hydrolysate was analyzed using an UV−vis spectrophotometer (SP-752, Shanghai Spectrum Instrument CO., Ltd., Shanghai, China) according to our previous study. 24 All batch experiments in the present study were carried out at least three times under identical conditions to ensure the repeatability, and the averaged values of three data sets were reported. The experiment standard deviations were found to be less than ±10%.…”

Swelling properties of sand-fixing materials prepared with acrylic acid/acrylamide copolymer and palygorskite

“…The WRC of ATP10 was signi cantly higher than that of the other materials, and no (ATP0) and lower addition of palygorskite (ATP3) always reduced the WRC. Moreover, the swollen water in sand-xing materials could be classi ed into bound water, half-bound water, and free water; compared to the bound water and half-bound water, the free water had a high transferability and could be easily lost under ultrasonic treatments [15,19]. The number of hydrophilic function groups, such as -COOH and -COO were assumed to be higher in the composites with palygorskite; this could result in a higher percentage of bound water and half-bound water in the sand-xing materials compared to free water.…”

“…However, the strong intermolecular and intramolecular bonds among the hydroxyl groups along the chain backbones limit the water solubility of cellulose [10,14]. Carboxymethyl cellulose (CMC) is a representative cellulose derivative with carboxymethyl groups bonded to some of these hydroxyl groups [15]. The polar carboxyl groups result in high solubility, excellent chemical reactivity and strong hydrophilicity.…”

Performance of biological sand-fixing materials before and after inoculation on sandy desert surface

“…The combined application of biological materials and chemical agents could accelerate biocrust formation under natural conditions compared to the application of individual cyanobacteria or chemical agents. The biological and chemical agents could physically x ne sand particles in a short period, which was crucial to desert algae settlement for biocrusts induction on bare sand soils, while also increasing water availability for desert algae crust growth due to their high water-absorbing capacity (Hui et al, 2018;Park et al, 2017;Shi et al, 2016). Thus, the double action of the sand-xing material could enable more rapid induction and stable formation of biocrusts than the application of desert algae crust alone under natural conditions.…”