Periphyton contribution for phosphorus removal and the influence of sediment in phytoremediation study using Eichhornia crassipes in closed mesocosms in a shallow hypereutrophic tropical environment (Lago das Garças, SP)

• Grant number: 16/13766-0
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): October 01, 2016
• Effective date (End): March 31, 2017
• Field of knowledge: Engineering - Sanitary Engineering - Environmental Sanitation
• Principal researcher: Tatiane Araujo de Jesus
• Grantee: Barbara Soares Ferreira
• Home Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil

Abstract

This study aims to assess the contribution of periphyton in phosphorus removal and the influence of sediment in a phytoremediation study using Eichhornia crassipes in closed mesocosms in a shallow hypereutrophic tropical environment (Garças Lake, SP). Two treatments will be performed (n = 3) with water and Eichhornia crassipes taken from the studied environment: (1) Control: no sediment; (2) with sediment from Garças Lake. Totaling thereby 6 mesocosms, which will be installed in the coastal region of Garças Lake. Mesocosms will be made up of plastic boxes of ~80 L each (size: 63 x 37 x 34 cm). They will be monitored monthly and for one year, following the quality parameters of the water of the tanks: pH, conductivity, turbidity and total phosphorus (TP). It will be performed monthly management of the system in order to remove the senile individuals and maintain only half of the free surface colonized, in order to enable the reproduction and growth of plants. During the monthly management will also be held the collection of macrophyte individuals to analyze the chemical composition of the biomass and joined periphyton (separated by scraping). For these arrays will determine the levels of organic matter and total phosphorus. Weather data will be obtained from a nearby weather station (500 m). The proposal aims to contribute information that may support future proposals for remediation of Garças Lake. (AU)