Metais pesados no solo e mamoneira adubada com biossólido e silicato de cálcio e magnésio

Abstract

R E S U M O, em base seca). Não houve interação entre as doses de silicato de cálcio e composto de lodo de esgoto, bem como o silicato de cálcio e magnésio não influenciou os teores de metais pesados no solo e na planta. No solo os teores de Zn e Cu aumentaram com o incremento das doses de composto de lodo de esgoto sendo que Ni, Pb, Cd e Cr não foram influenciados pela aplicação deste resíduo. Na planta com aumento das doses de composto de lodo de esgoto houve aumento apenas nos teores de Cd e Pb.Heavy metals in soil and castor bean fertilized with biosolids and magnesium and calcium silicate A B S T R A C TBiosolids are an excellent source of plant nutrients; however, it can contaminate the soil. The aim of this work was to assess the influence of the fertilization with sewage sludge compost and calcium and magnesium silicate on the levels of heavy metals in soil and in castor plants. The experiment was conducted at the Institute of Agrarian Sciences (ICA) of UFMG in Montes Claros, MG, from June to December 2010. The cultivation was carried out in area of Inceptisol, using the castor bean plant (Ricinus communis L.) variety BRS energy. The experiment was conducted in randomized blocks, in factorial scheme 4 x 2, with 3 replications consisting of 2 doses of calcium and magnesium silicate (0 and 1 t ha , on dry weight basis). There was no interaction between the doses of calcium silicate and sewage sludge compost, as well as, the calcium and magnesium silicate did not influence the levels of heavy metals in soil and plant. In soil, the levels of Zn and Cu increased with the increase in dose of sewage sludge compost, however Ni, Pb, Cd and Cr were not influenced by the application of residue. In the plant, increasing dose of sewage sludge compost increased only the Cd and Pb levels. Palavras-chave:lodo de esgoto compostagem adubação orgânica resíduos de siderurgia

Content of Heavy Metals in Soil and in Pineapple Fertilized With Sewage Sludge

“…166 of Minas Gerais, published on June 29, 2011 (Minas Gerais, 2011), suggesting the safe use of sludge or sludge compounds in agriculture due to the smallest content of heavy metals in these soils. However, there are many discrepancies in the literature regarding levels of soil contamination with heavy metals from the sewage sludge, which vary greatly depending on the soil, the quality of the sewage sludge and its by-products, the applied dose and the frequency of fertilization (Nogueira et al, 2007(Nogueira et al, , 2008Zuba Junio et al, 2011;Nascimento et al, 2014aNascimento et al, , 2014bNascimento et al, , 2015.…”

Productivity and nutrition of castor bean fertilized with sewage sludge stabilized by different processes

“…Several studies have been conducted on sewage sludge in agriculture to evaluate its role in alleviating the negative impacts caused by its accumulation and, because of the potential of this residue, as an alternative source of fertilization, to fully or partially supply the nutritional needs of plant species of economic and social interest (Freitas et al, 2015;Fávaris et al, 2016). Studies involving fertilization with sewage sludge have been conducted in Brazil and the results were favourable for several crops in the response obtained to the application of this waste (Nascimento et al, 2015;Santos et al, 2019;Gonçalves et al, 2019).…”

Phytoremediation Potential of Crotalaria juncea Plants in Lead-Contaminated Soils

“…When caused by heavy metals, these problems are particularly harmful due to their high toxicity (Santos & Rodella, 2007). For instance, agricultural productivity is significantly reduced on heavy metal contaminated soils and, alarmingly, when absorbed by plants, these elements may enter the food chain (Nascimento et al, 2015).…”