Abstract
The process of obtaining of new biosorbents from apricot seed shells by oxidative-organosolvent processing in acetic acid - hydrogen medium has been studied. The structural and sorption properties of the materials obtained using physical and chemical methods were investigated. The effect of the reactants ratio in solution, as well as the duration of the modification process on the yield, content of cellulose, lignin, and mineral components and on sorption properties of the products was studied. The dependence between the mineral content and the adsorption pore volume was shown. The positive effect of hydrogen peroxide application in the process of modifying of plant waste on cellulose content was estimated. Increasing the duration of modification increases the contribution of oxidative transformation of lignin into soluble products and decreases the yield of the lignocelluloses’ materials. The regularities of sorption of marker of low molecular weight toxins and non-steroidal anti-inflammatory drugs on obtained products were investigated. It has been found that the highest sorption capacity of obtained lignocelluloses’ sorbents towards methylene blue and Sodium Diclofenac corresponds to the samples with polysaccharide content 60%. It has been also found that the sorption equilibrium occurs within 120 min of contact. The obtained results demonstrate the feasibility of application of such lignocelluloses’ carriers in the production of prolonged action drugs.
Highlights
Vegetable raw materials are biopolymer recovery complexes consisting in mainly of cellulose, lignin and hemicelluloses
That increase the duration of the shell processing of stones in a media “acetic acid - hydrogen peroxide” from 30 to 150 min is natural leads to a decrease in the output of lignocelluloses product in all investigated range of modifying ratios reagents (Figure 1a)
Hydrogen peroxide in the processing process spent on the formation of peracetic acid, some of it is lost decomposition
Summary
Vegetable raw materials are biopolymer recovery complexes consisting in mainly of cellulose, lignin and hemicelluloses. Lignocelluloses complex due to the presence different functional groups (methoxyl, hydroxyl, carbonyl, etc.) characterized by a number of valuable properties, allowing the use of vegetable raw materials in various industries. Special scientific and practical interest today is an opportunity use of restorative plant raw materials for medical supplies purpose [1]. It is known that cellulose and its derivatives are used in various industries medicine, because both the polymers themselves and their breakdown products are non-toxic and harmless. Microcrystalline cellulose, oxidized cellulose, phosphates and cellulose acetates, as other derivatives have become widespread use in pharmaceutical and medical practice [3,4,5,6]. Lignin, which is a by-product the product of chemical wood processing, too used in medicine as an enterosorbent, spectrum of adsorption activity which includes toxins of exoand endogenous nature, allergens, xenobiotics, heavy metals, radionuclides [7]
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