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1 Journal of Achievements in Materials and Manufacturing Engineering

1 2015

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Application of micro- and nanostructural multifunctional halloysite-based sorbents from DUNINO deposit in selected biotechnological processes

Sakiewicz P., Cebula J., Piotrowski K., Nowosielski R., Wilk R., Nowicki M.

Journal of Achievements in Materials and Manufacturing Engineering

2015

Vol. 69, nr 2

69--78

Purpose: The aim of this paper was to present some research data from real industrial tests of halloysite-based sorbents in simultaneous removal of various groups of gaseous hazardous substances produced in selected industrial-scale biotechnological processes. Special attention was paid on effectiveness of original, newly developed micro- and nanostructural, universal “Dunino” halloysite-based sorbents in simultaneous removal of odors, ammonia, hydrogen sulphide, silanes, siloxanes and VOCs. Design/methodology/approach: Numerous studies including SEM, analytical method of continuous flame-ion detection (FID), identification of outlet gas stream composition with spectrophotometric methods, olfactometry tests and practical verification in real industrial-scale biotechnological processes were made to examine sorption properties of the halloysite-based filters. Findings: Newly invented nanostructural multifunctional halloysite-based sorbents show high capabilities in respect to simultaneous removal of unwanted substances from biotechnological processes penetrating into natural environment, e.g. odors, ammonia, hydrogen sulphide, silanes, siloxanes, VOCs. Research limitations/implications: Experimental studies described in this work should contribute to improvement of halloysite-based sorbents composition and optimal selection of their work parameters. Practical implications: Enhanced research results in the discussed problem area will make appropriate, rational composition of filtration bed possible – sorbent mixture (halloysite with other sorbents admixtures, natural or synthetic), disintegration degree (granulated form, powder, dust), activation method (physical, chemical) and optimal conditions for interphase contact between sorbent of a given size distribution and purified gas stream to reach the possibly maximal efficiency in unwanted components removal. Originality/value: Newly invented nanostructural halloysite-based sorbents demonstrate higher sorption capabilities in relation to known conventional solutions, moreover simultaneous sorption of many hazardous species is possible.