Propuesta de aprovechamiento de residuos de construcción y demolición (RCD) como fuente nutricional para suelos contaminados por pesticidas

Construction and demolition waste (C&DW) is the result of urban growth such as concrete blocks,bricks, gypsum, porcelain, etc. Currently, urban development has become exponential, which hasled to increased construction and demolition activity, generatingthe inadequate disposal andaccumulation of waste from these activities, thus causing environmental and social problems,because about 57% of waste is not treated properly.Given the high use of soils for agriculture, various substances have been used to optimize resultsor to prevent and mitigate certain pests, such as pesticides. Commonly, to support plant growth,fertilizer has been used to nourish the soil, increasing the essential mineral nutrients for the plantsand also are involved in metabolic or structural functions, these minerals are C, H, O, N and Sbeing the main contributors of organic matter, P, B and Si that activate the defense system and ithas been evidenced the presence of minerals (Ca, Mg, Fe, Mn, Zn, Si, Al, and Na) in thecomposition of C&DW, which has led to the hypothesis of; if it would be possible to give themanother productive use and if it would be viable to apply them to the soil so that the plants assimilatethem and their nutrition is achieved.To make these nutrients moreaccessible to plants, it isnecessary to add a microorganism previously extracted from the C&DW to degrade it and disposeof the nutrients in the soil. The use of the pesticide INVETRINA 200 EC was evaluated as toxicto plants, since the proposal is based on the use of microorganisms and C&DW to nourishagricultural soils where this pesticide has been used.To determine the concentration of the pesticide to which plants are affected in their growth, anecotoxicity test was used, indicating then 4 concentrations of 2.75mg/L, 5.5 mg/L, 11mg/L and 22mg/l to determine the most lethal dose that for this case was 22 mg/L, although with the contractionof 2.75 mg/l it stimulated growth. It was determined that the existing microorganisms in theC&DW were Gram-positive bacteria, being specifically violet bacilli possibly capable of degradingthe C&DW, and from this it is proposed to use the composition C&DW+microorganism toimplement it as a nutritional source in the soils as a substitution to the commercial fertilizer, in thisway it would be reducing costs in agriculture and supporting the problem of soil degradation.

• Autores: Corrales Vargas, Catalina; Morales Jiménez, Braulio Andrés
• Fecha de publicación: 2020
• Institución: Universidad de San Buenaventura
• Repositorio: Repositorio USB
• Idioma: spa
• OAI Identifier: oai:bibliotecadigital.usb.edu.co:10819/7907
• Acceso en línea: http://hdl.handle.net/10819/7907
• Palabra clave: Aprovechamiento; RCD; Pesticidas; Suelo; Microorganismo; Nutrición; Harnessing; C&DW; Pesticides; Soil; Microorganism; Nutrition; Suelos; Contaminación
• License: Atribución-NoComercial-SinDerivadas 2.5 Colombia