T. B. Nikulicheva, V. S. Zakhvalinsky, V. V. Vyazmin, I. S. Nikulin, O. A. Telpova, V. B. Nikulichev
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Using citric acid production waste as a new material for an air humidity sensor
Currently, one of the solutions for recycling by-products of technological processes that accumulate as production waste is their use as functional materials of electronics. The main objective of our study was to determine the sensitivity of samples to air humidity using impedance spectroscopy. The properties of samples obtained by uniaxial and isostatic pressing methods from calcium sulfate hemihydrate and calcium sulfate dihydrate were studied. The impedance of the samples was studied as a function of relative air humidity at different frequencies. Cyclic dependencies of the complex resistance response were observed when relative humidity varied in the range 40 to 80% within the frequency range from 200 Hz to 1 MHz. Based on the results of the studies, a conclusion was made about the possibility of practical application of waste from the technological process of producing food citric acid, citrogypsum, as a source for obtaining a new material for an air humidity sensor.
期刊介绍：
International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management.
A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made.
The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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