M. A. S. Nobrega, M. S. Pontes, G. Santos, C. A. L. Cardoso, I. S. Motta, E. F. Santiago
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引用次数: 0
Abstract
As a result of the treatment stations' operation, sewage sludge has become a problem on a global scale. Alternatives to a better destination are imperative, highlighting the employment of sewage sludge as a plant subtract. This study evaluated the physiological and chemical status of Maclura tinctoria (L.) seedlings cultivated in a substrate composed of a mixture of sewage sludge and sugarcane bagasse, through the chlorophyll fluorescence technical and the inner metals concentration, aiming to discuss ecologically correct means for waste management and sustainable forestry practices. The results indicated that the treatments with the proposed substrate positively impacted the physical and physiological plants characteristics (p < 0.05). Overdoses provoked increases in the inner concentration of metals (Fe, Zn) and heavy metals (Cu, Cd, Cr, Pb, and Ni). However, the photochemical activity of photosystem II indicates that the phytotoxic risk is lower than expected. The changes observed in the chlorophyll-a fluorescence induction curves, which reflect the photochemical activity of the leaves, corroborate this. In this way, the ability of the substrate to optimize the growth of young plants is highlighted, as well as the need to monitor the accumulation of metals in plant tissues, contributing valuable information on the advantages and ecological consequences of using sewage sludge in forestry and promoting sustainable waste management and reforestation methods. Research involving sewage sludge use is important to avoid the accumulation of this contaminant in landfills.
期刊介绍：
International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management.
A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made.
The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.
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