Carbon sorbents from peracetic lignin

The transition to non-traditional types of plant raw materials for the production cellulose and based on it is becoming more relevant scientists industry around world. most expedient this use waste from agro-industrial complex in form straw or stalks. During delignification non-wood lignocellulosic by organosolv method, which quite environmentally friendly, spent solutions with a high soluble lignin content are formed. From an ecological point view, important create complex, practically waste-free technology processing into target products. paper investigated possibility using precipitated cooking solution after rapeseed following carbonization obtaining sorbents removal dangerous synthetics dyes water solution.
 At end cooking, cellulosic product was separated filtration. collected separate container treated 5 volumes water, resulting condensation. Condensed centrifugation at 5500 rpm 10 min washed distilled dehydrated dried temperature 80 oC until constant moisture 7-8% reached.
 Then 20 wt.% orthophosphoric acid sodium hydroxide, carbonized muffle furnace.
 Carbonization leads decrease average pore size 2.191-4.421 nm increase volume 1.8 times when hydroxide 2.0 acid, allows sorption capacity material.
 influence pH aqueous process pollutant decisive. Oxygen-containing functional groups give surface positive charge acidic environment, formation electrostatic repulsion forces dye cation, also has charge. When increased slightly alkaline, dissociation occurs, therefore sorbent acquires negative charge, emergence attraction dye. Absorption cationic increases increasing 6.0, further does not affect efficiency process.
 porosity sorbent, so takes time reach full equilibrium. first minutes, maximum absorption rate methylene blue observed, 180 minutes contact, equilibrium Using Langmuir equation, isotherm obtained estimated, established that vacant adsorption sites homogeneous monolayer. It kinetics described pseudo-second-order model.
 development effective method peracetic utilization as carbon resource-saving technologies.