Investigation of the influence of ultrasonic treatment on the sorption properties of the pyrolysis product of wood waste

Abstract

AnnotationIn the article, the object of study is the sorption material obtained by low-temperature pyrolysis from wood waste and treated with ultrasound. Ultrasonic treatment is one of the methods of improving the sorption characteristics of the pyrolysis product by increasing the specific surface area. The adsorption capacity of pyrolysis products was studied by titrimetric method using methylene blue on the UNICO 2800 spectrophotometer and iodine. An increase in sorption activity was found after ultrasonic action on the sorption material: 1,3 times for methylene blue, 3 times for iodine. Sorption properties of the product of wood waste pyrolysis were investigated after ultrasonic treatment in relation to ions of iron, copper, chromium, nickel and zinc under static conditions using atomic emission spectrometry with inductively coupled plasma on the Agilent 720-OES spectrometer. The sorption degree is calculated. The degree of purification from HMI with the use of wood waste pyrolysis product after ultrasonic treatment is: for Fe – 98%, Cu – 93.6%, Cr – 72.2%, Ni – 60.6%, and Zn – 77.9%. The paper shows that the product of pyrolysis of wood waste after ultrasonic treatment is almost equal to the degree the sorption of commercial sorbent BAU with respect to ions of iron, copper and chromium. Ultrasonic treatment to a frequency of 35 kHz for 30 minutes allows to increase the sorption capacity of the product of pyrolysis of wood waste by Fe ions by 8.8 times, Cu – 2.6 times, Cr – 1.1 times.