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NATURAL WASTE AS ENVIRONMENTAL REMEDIATION: MICROCOSMS APPLICATION

Abstract

The economic development associated with the pursuit of improving the quality of life significantly increased the release of pollutants to the environment, affecting aquatic and terrestrial systems. Among the main inorganic pollutants we highlight the potentially toxic metals due to its high applicability and toxicity. Natural substances that interact with these pollutants minimizing their availability are of great environmental interest. Many organic wastes are simply disposed in the environment and there are not studies on its remedial potential. Generally, they are not expensive to obtain and they have high complexing capacity. In this context, there is the filter cake and humin. The filter cake is a major waste of the sugarcane industry. It is a mixture of ground pulp and sludge from the settling of the treatment process and clarifying the juice of sugarcane obtained in the rotary filter after extraction of residual sucrose. The filter cake is produced annually in large quantities. In many cases, the filter cake is simply disposed on the environment as a source of nutrients. Other organic residue which has often been discarded when studies on the soluble organic matter is humin. The humin is the insoluble fraction of the main form of organic matter distributed in aquatic and terrestrial systems. This is the fraction less studied by area researchers, but which have promising potential to function as an adsorbent resin of different species of environmental interest. This design aims at using these residues as a source of essential nutrients and at the same time as a chelating resin toxic metal. Thus, this project aims to extract, characterize organic waste (filter cake and humin) and simulate the environmental behavior of these species using experiments in microcosms. Experiments in microcosms aim to apply the organic waste enriched with nutrients on soil samples containing potentially toxic metals, using rainwater to verify the percolation of these species. The content of the metal species will be determined in function of time in soil samples containing organic waste and the water samples. With the results of this project will be possible to verify the environmental performance of such wastes and to verify the functionality of these materials into the environment. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DE MELLO GABRIEL, GABRIELE VERONICA; PITOMBO, LEONARDO MACHADO; TAVARES ROSA, LUANA MARIA; NAVARRETE, ACACIO APARECIDO; BOTERO, WANDER GUSTAVO; DO CARMO, JANAINA BRAGA; DE OLIVEIRA, LUCIANA CAMARGO. The environmental importance of iron speciation in soils: evaluation of classic methodologies. ENVIRONMENTAL MONITORING AND ASSESSMENT, v. 193, n. 2 JAN 15 2021. Web of Science Citations: 0.
GABRIEL, GABRIELE V. M.; OLIVEIRA, LUCIANA C.; BARROS, DAYANE J.; BENTO, MARILIA S.; NEU, VANIA; TOPPA, ROGERIO H.; CARMO, JANAINA B.; NAVARRETE, ACACIO A. Methane emission suppression in flooded soil from Amazonia. Chemosphere, v. 250, JUL 2020. Web of Science Citations: 0.
OLIVEIRA, LUCIANA C.; BOTERO, WANDER G.; FARIAS, TAMYRIS S.; SANTOS, JOSUE C. C.; GABRIEL, GABRIELE V. M.; GOVEIA, DANIELLE; CACURO, THIAGO A.; WALDMAN, WALTER R. Application of Natural Organic Residues as Adsorbents to Remove Lead from Waters. WATER AIR AND SOIL POLLUTION, v. 230, n. 8 AUG 2019. Web of Science Citations: 0.

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