Transformation of minerals of a gellike sludge solid after the municipal waste water biological treatment under the bioextraction of heavy metals

1Kalinichenko, KV
Nicovskaya, GN
Kosorukov, PA
1F. D. Ovcharenko Institute of Biocolloidal Chemistry of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2019, 3:78-83
Section: Chemistry
Language: Ukrainian

In an original process of bioextraction of the excess of heavy metals from a gellike sludge solid after the municipal waste water biological treatment, the redistribution between the liquid and solid phases has occurred. The last one transforms into an efficient fertilizer for plants. The states of minerals in raw and conditioned sludge solids and in natural comparative objects (soils) are studied by Xray diffraction methods. The diffractograms show a low crystallinity in the structure of sludge solids in comparison with soils. The elimination of the reflexes of minerals of the group of feldspars and calcite and the appearance of minor peaks of minerals of zeolites on the diffractogram of a conditioned sludge solid as distinguished from the native sludge solid have pointed out the start of the processes of formation of new minerals under the action of metabolizing sludge microorganisms.

Keywords: fertilizers, mineralogical composition, sludge sediments, soil, Xray diffraction analysis

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