EFFECT OF SOIL ORGANIC MATTER ON THE KINETIC DESORPTION OF POTENCIALY TOXIC ELEMENTS IN GARDEN SOILS

• Grant number: 16/13225-9
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: October 03, 2016
• End date: October 02, 2017
• Field of knowledge: Agronomical Sciences - Agronomy - Soil Science
• Principal Investigator: Luís Reynaldo Ferracciú Alleoni
• Grantee: Eloá Moura Araújo
• Supervisor: Daniel G. Strawn
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: University of Idaho, United States
• Associated to the scholarship: 15/25416-0 - Bioconcentration and kinetic of desorption of potentially toxic elements in soils cultivated with vegetables in organic and conventional systems, BP.DR

Abstract

Plants require nutrients from the soil solution for their growth. However,potentially toxic elements (PTEs) can be absorbed and accumulated in plant organs andtissues, and this is an important channel through which PTEs can enter into the foodchain. The study of the dynamics of these elements in the soil is fundamental for abetter understanding of the factors that influence soil-plant transfer. Kinetic studies canhelp to elucidate factors related to PTEs desorption, that is a key phenomenon affectingPTE bioavailability. Furthermore, reaction time, contact time and the content of soilorganic matter- OM (and its multiple interactions with the soil mineral fraction) areclosely related to the processes of sorption and solubilization of PTEs in the soil. Ouraim is to assess the effect of OM on PTE desorption in garden soils. Kineticexperiments will be carried out using rates of organic composts added to PTE-spikedsoils. A stirred-flow chamber system will be used, and the extracts will be collected atfixed intervals. PTE desorption against time, and the static method, Profile Analysis,will allow the evaluation of the effect of the OM and time on PTE desorption.

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)

ARAUJO, ELOA; STRAWN, DANIEL G.; MORRA, MATTHEW; MOORE, AMBER; FERRACCIU ALLEONI, LUIS REYNALDO. Association between extracted copper and dissolved organic matter in dairy-manure amended soils. Environmental Pollution, v. 246, p. 1020-1026, MAR 2019. (16/13225-9)