Atributos químicos do solo e lixiviação de compostos fenólicos após adição de resíduo sólido alcalino

Abstract

RESUMOA utilização de resíduos alcalinos da indústria de papel e celulose (DREGS) na agricultura como corretivo de acidez do solo, vem sendo amplamente empregada como alternativa de descarte no solo de forma a reduzir o impacto ambiental. Objetivou-se, com este trabalho, determinar a influência da aplicação do dregs, rejeito da indústria de papel e celulose, nos atributos químicos do solo e na lixiviação de compostos fenólicos. As unidades experimentais foram constituídas por colunas de lixiviação preenchidas com solo incorporado com dregs nas doses de 0,0; 2,5; 5,0 e 10,0 g kg -1 . Chemical attributes of soil and leaching of phenolic compounds after addition of alkaline solid residue ABSTRACT The use of alkaline residues from pulp and paper industry (´dregs´) in agriculture as a corrective of soil acidity is being widely used as an alternative of ground disposal in order to reduce the environmental impact. The objective of this study was to determine the influence of application of the 'dregs', waste from pulp and paper industry, in soil chemical properties and leaching of phenolic compounds. The experimental units consisted of leaching columns filled with soil incorporated with 'dregs' at doses of 0, 2.5, 5.0 and 10.0 g kg -1 . Chemical analysis were performed in these soils, a Humic Camibissolo and a Typic Quartzipsamment soils, tests of solubilization of phenolic compounds and leaching tests were also carried out to determine the total content of phenolic compounds present in the leachate. The use of the 'dregs' modified the chemical attributes of the Humic Cambisol and Typic Quartzipsamment. The results obtained in the analysis of the leachate showed that the application of the 'dregs' led to an increase of compounds above the maximum allowed by law, which is 0,01 mg L -1 (ANBR, 2004a) and 0,5 mg L -1 (CONAMA, 2008).

Chemical attributes of soils with eggshell application

“…Similar results regarding the neutralization of soil acidity were also obtained by Branco et al (2013); Lasso et al (2013); Raymundo et al (2013) and Giostri et al (2014), using different types of residue. Branco et al (2013) verified an increase in the pH and a decrease in the potential acidity of two soils with different clay contents (142 and 390 g kg -1 ) with the application of doses of alkaline solid waste from the paper and cellulose industry.…”

“…Branco et al (2013) verified an increase in the pH and a decrease in the potential acidity of two soils with different clay contents (142 and 390 g kg -1 ) with the application of doses of alkaline solid waste from the paper and cellulose industry. According to these authors, the soil acidity correction occurred due to the high amount of carbonates and hydroxides present in this residue.…”

Atributos químicos da solução e do solo após aplicação de resíduo da extração de celulose

“…Embora o tratamento T3 (1,2 t ha -1 de dregs/grits) forneça MO ao solo, ele pode também aumentar os teores de Na, como foi verificado no Latossolo de textura franco-arenosa, tanto na análise química do solo (Tabela 5) como na análise da composição da solução do solo (Tabela 6). Este aumento de Na proveniente da aplicação de dregs/grits ao solo também foi verificado em pesquisa realizada por Branco et al (2013) em um Cambissolo e Neossolo Quartzarênico.…”

Wastes from pulp and paper mills - a review of generation and recycling alternatives

“…Productivity rates were found to be similar to those obtained using commercial limestone. However, some negative aspects must be taken into consideration in relation to this practice, as cited in [49]. The authors determined the influence of dregs in the soil chemical properties and the leaching of phenolic compounds.…”