Caracterização qualitativa e quantitativa de metais pesados em alface adubada com composto de lixo urbano

Sampaio, Regynaldo Arruda; Silva, Leila G. da; Costa, Cândido Alves da; Fernandes, Luiz Arnaldo; Guilherme, Denílson de Oliveira

doi:10.1590/s1415-43662009000700018

Cited by 8 publications

(8 citation statements)

References 19 publications

(11 reference statements)

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“…These values are well above the maximum value allowed for fresh biomass (1.0 mg kg -1 ), according to ANVISA (1965), posing risks to human health. It is well known that lettuce plants accumulate high metal concentrations in the shoot (Sampaio et al, 2009). …”

Section: Plant Dry Matter Yield and CD Concentration And Accumulationmentioning

confidence: 99%

Cadmium availability and accumulation by lettuce and rice

Pereira

Rozane

Araújo

et al. 2011

Rev. Bras. Ciênc. Solo

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SUMMARYAmong the toxic elements, Cd has received considerable attention in view of its association with a number of human health problems. The objectives of this study were to evaluate the Cd availability and accumulation in soil, transfer rate and toxicity in lettuce and rice plants grown in a Cd-contaminated Typic Hapludox. Two simultaneous greenhouse experiments with lettuce and rice test plants were conducted in a randomized complete block design with four replications. The treatments consisted of four Cd rates (CdCl 2 ), 0.0; 1.3; 3.0 and 6.0 mg kg -1 , based on the guidelines recommended by the Environmental Agency of the State of São Paulo, Brazil (Cetesb). Higher Cd rates increased extractable Cd (using Mehlich-3, Mehlich-1 and DTPA chemical extractants) and decreased lettuce and rice dry matter yields. However, no visual toxicity symptoms were observed in plants. Mehlich-1, Mehlich-3 and DTPA extractants were effective in predicting soil Cd availability as well as the Cd concentration and accumulation in plant parts. Cadmium concentration in rice remained below the threshold for human consumption established by Brazilian legislation. On the other hand, lettuce Cd concentration in edible parts exceeded the acceptable limit.Index terms: Lactuca sativa L., Oryza sativa L., soil pollution, chemical extractants, heavy metals, human health.(1) Received for publication in January 2010 approved in december 2010.

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Section: Plant Dry Matter Yield and CD Concentration And Accumulationmentioning

confidence: 99%

Cadmium availability and accumulation by lettuce and rice

Pereira

Rozane

Araújo

et al. 2011

Rev. Bras. Ciênc. Solo

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“…Linear increases in the Cu, Zn, Ni and Pb concentrations were reported by Sampaio et al (2009), in an experiment using pots, and no Cd was detected in soils with different clay concentrations, in response to rates equivalent to up to 90 Mg ha -1 of urban waste compost. The differences between these and the results of our study can be explained by the urban waste compost rates applied, which were lower in this experiment.…”

mentioning

confidence: 82%

“…Trop., Goiânia, v. 47, n. 2, p. 186-194, Apr./Jun. 2017 cultivation of flowers (Farias et al 2013), vegetables (Sampaio et al 2009), sugarcane (Nobile et al 2012) and grain crops (Strojaki et al 2013). However, few field studies have addressed the fundamental issue of defining adequate and safe rates of this organic fertilizer for crops, in Brazil.…”

Section: Introductionmentioning

confidence: 99%

Soil chemical properties and nutrients in maize fertilized with urban waste compost1

Mantovani

Spadon

2017

Pesqui. Agropecu. Trop.

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Urban waste compost has a potential to be used as an organic fertilizer in agriculture, but field studies are required to define the recommendable rates for crops. This study aimed at evaluating the effect of fertilization with urban waste compost on the soil chemical properties, yield, nutrient and heavy metal contents, in maize leaves and grains. The field experiment was carried out in a randomized complete block design, with seven treatments and four replications. The treatments consisted of six urban waste compost doses (0 Mg ha-1, 5 Mg ha-1, 10 Mg ha-1, 20 Mg ha-1, 30 Mg ha-1 and 40 Mg ha-1), applied in the planting furrow, plus an additional control treatment, with NPK mineral fertilization and no waste compost application. Fertilization with up to 40 Mg ha-1 of urban waste compost improves soil fertility. Fertilization with urban waste compost increases grain yield and the N, P and K contents in leaf tissue and maize grains, without inducing plant contamination with heavy metals. The application of 30 Mg ha-1 of urban waste compost can replace mineral fertilization in maize cultivation.

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“…Sludge sewage application in lettuce crop is prohibited by Brazilian Law (CONAMA, 2006). However, the lettuce was chosen as test plant because it is very sensitive to the presence of metals in the soil and the evaluation of contamination levels of this plant with heavy metals is an important indicator for the risk assessment of the use of organic waste in agriculture (SAMPAIO et al, 2009).…”

Section: Methodsmentioning

confidence: 99%

Heavy metals availability and soil fertility after land application of sewage sludge on dystroferric Red Latosol

2013

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Sewage sludge is the solid residue obtained from urban sewage treatment plants. It is possible to use the sludge in a sustainable way as fertilizer and as soil conditioner due to its high levels of organic matter and nutrients. Besides pathogens and volatile organic compounds, the residue may also contain heavy metals which may accumulate and contaminate crops and the food chain. The aim of this study was evaluates the changes in the fertility of dystrophic Red Latosol and in the availability of heavy metals following application of sewage sludge. It was assessed whether organic matter supplied to the soil as large amounts of sewage sludge would decrease availability of heavy metals in the soil due to of insoluble compounds formation. From this, an experiment was carried out in polyethylene pots using lettuce plant for test. Sewage sludge were applied to the soil in concentrations equivalent to 60, 120 and 180 t ha -1 , and a control without sludge, in four replicates, in a completely randomized design. The results show that sewage sludge led to an increase of organic matter contents, of the cation exchange capacity (CEC) and of nutrients found in the soil. It also improved plant growth up to a concentration of 120 t ha -1 . Availability of heavy metals, however, was reduced in sludge concentrations starting with 120 t ha -1 .Index terms: Biosolids, soil pollution, nutrients, Lactuca sativa. RESUMOLodo de esgoto é o resíduo obtido após o tratamento dos esgotos municipais. Em decorrência dos elevados teores de matéria orgânica e de nutrientes, é possível utilizar o lodo, de forma sustentável, como fertilizante agrícola e condicionador de solos. Todavia, além de patógenos e de compostos orgânicos voláteis, esse resíduo pode conter ainda metais pesados que podem ser acumulados e contaminar as culturas agrícolas e a cadeia trófica. Assim, neste trabalho, objetivou-se avaliar as alterações na fertilidade de um Latossolo Vermelho distrófico e na disponibilidade de metais pesados decorrentes da aplicação de lodo de esgoto. Foi avaliado se a matéria orgânica fornecida ao solo com aplicações elevadas de lodo deverá, em razão da formação de compostos insolúveis, diminuir a disponibilidade dos metais pesados do solo. Para tanto, foi conduzido experimento em vasos de polietileno, com a aplicação do lodo no solo nas concentrações equivalentes a 60, 120 e 180 t ha -1 , e um tratamento controle sem lodo, com quatro repetições, em delineamento inteiramente casualizado, utilizando alface como planta teste. Os resultados indicam que o lodo de esgoto promoveu o aumento dos teores de matéria orgânica, da capacidade de troca catiônica (CTC) e de nutrientes no solo e ainda melhorou o desenvolvimento das plantas até a concentração de 120 t ha -1 . A disponibilidade dos metais pesados, no entanto, foi reduzida nos tratamentos a partir de 120 t ha -1 de lodo.Termos para indexação: Biossólidos, poluição do solo, nutrientes, Lactuca sativa.

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Caracterização qualitativa e quantitativa de metais pesados em alface adubada com composto de lixo urbano

Cited by 8 publications

References 19 publications

Cadmium availability and accumulation by lettuce and rice

Cadmium availability and accumulation by lettuce and rice

Soil chemical properties and nutrients in maize fertilized with urban waste compost1

Heavy metals availability and soil fertility after land application of sewage sludge on dystroferric Red Latosol

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