Open AccessADSORPTION OF ORGANIC DYES ON METALLURGICAL SLAG OF Fe-Ni ALLOY PRODUCTION
Author(s) -
Э. Б. Хоботова,
Inna V. Hraivoronska,
Maryna Ihnatenko,
Iuliia Kaliuzhna
Publication year - 2020
Publication title -
izvestiâ vysših učebnyh zavedenij. himiâ i himičeskaâ tehnologiâ/izvestiâ vysših učebnyh zavedenij. seriâ himiâ i himičeskaâ tehnologiâ
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.221
H-Index - 5
eISSN - 2500-3070
pISSN - 0579-2991
DOI - 10.6060/ivkkt.20206308.6197
Subject(s) - adsorption , sorption , slag (welding) , sorbent , chemistry , methylene blue , congo red , materials science , inorganic chemistry , chemical engineering , metallurgy , organic chemistry , photocatalysis , engineering , catalysis
The optimal parameters of organic dyes adsorption on the metallurgical slag of the Fe-Ni alloy production of the Pobuzhsky Ferronickel Plant, Ukraine: pH, the mass ratio “dye: slag adsorbent”, the type of chemical activation depending on the mode of the adsorption process were determined. Sorption of organic dyes (methylene blue MB, Congo red and methyl violet MV) by slag was studied spectrophotometrically. It is shown that after acid and alkaline activation the surface adsorption centers are formed on the surface of the slag: hydroxyl and silanol groups, whose dissociation causes a negative charge of the particles surface. The most appropriate ratio is “MB : slag” = 1 mg/g, at which the adsorption value a=0.92 mg/g is recorded at a treatment efficiency of 92 %. The maximum efficiency of MB adsorption by slag based on diopside was recorded in the pH range of 4.8- 10.4. The dependence of the type of chemical activation of slag with basic mineral – diopside on the sorption mode of organic dyes was determined. Slag acid activation is advisable in the static mode of MV sorption; alkaline – under conditions of MV dynamic sorption with a low rate of solution passage through the sorbent layer. Diopside-based slag is expedient to use as an adsorbent of organic dyes at the level of their low concentrations at the local treatment of wastewater generated during the certain technological operations.