The carbonaceous sorbent based on the secondary silica-containing material from oil extraction industry

3rd International Conference Environment and Sustainable Development of Territories: Ecological Challenges of the 21st Century

生态环境科学;地球科学;经济学

Starostina, I.V.^1 ; Stolyarov, D.V.^1 ; Anichina, Ya N^1 ; Porozhnyuk, E.V.^1

Belgorod State Technological University Named after v G Shukhov, Kostyukova Str 46, Belgorod

308012, Russia^1

关键词: Carbonaceous materials;    Carbonaceous sorbents;    Oil extraction industries;    Optimal temperature;    Organic impurities;    Sorption capacities;    Specific surface;    Thermal modification;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/107/1/012075/pdf
DOI  :  10.1088/1755-1315/107/1/012075

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The object of research in this work is the silica-containing waste of oil extraction industry - the waste kieselghur (diatomite) sludge from precoat filtering units, used for the purification of vegetable oils from organic impurities. As a result of the thermal modification of the sludge, which contains up to 70% of organic impurities, a finely-dispersed low-porous carbonaceous mineral sorption material is formed. The modification of the sludge particles surface causes the substantial alteration of its physical, chemical, adsorption and structural properties - the organic matter is charred, the particle size is reduced, and on the surface of diatomite particles a carbon layer is formed, which deposits in macropores and partially occludes them. The amount of mesopores is increased, along with the specific surface of the obtained product. The optimal temperature of sludge modification is 500°C. The synthesized carbonaceous material can be used as an adsorbing agent for the purification of wastewater from heavy metal ions. The sorption capacity of Cu2+ ions amounted to 14.2 mg•g-1and for Ni2+ ions - 17.0 mg•g-1. The obtained values exceed the sorption capacity values of the initial kieselghur, used as a filtering charge, for the researched metal ions.