15 results

Heavy metals and pesticides in soils under different land-use patterns in neotropical high Andean Páramos

Lizeth Manuela Avellaneda-Torres ORCID logo , Andrea Patricia Pinilla Núñez ORCID logo , Laura Daniela Jerez Pérez ORCID logo , Baudilio Acevedo Buitrago ORCID logo

25/Apr/2022

ABSTRACT Páramos are unique strategic ecosystems in the neotropical region, above the upper limit of closed forest and below the lower limit of perpetual snow in the tropical mountains of Central and South America. Their soils are of particular importance for water regulation and carbon storage; however, thousands of peasants develop agricultural activities such as potato cultivation and livestock farming in these areas. This research aimed to evaluate the possible heavy metals contents (arsenic, cadmium, mercury, and lead) and pesticide […]

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Assessment of Trace Element Contents in Soils and Water from Cerrado Wetlands, Triângulo Mineiro Region

Bruno Teixeira Ribeiro ORCID logo , Diogo Costa Nascimento, Nilton Curi, Luiz Roberto Guimarães Guilherme, Enio Tarso de Souza Costa, Guilherme Lopes, [...]

24/Apr/2019

ABSTRACT In the Brazilian Cerrado biome, there are wetlands locally known as “Veredas”, which are swampy plains between hills and rivers. Since the 1970’s, the Cerrado biome has been gradually converted to livestock, crop, or forestry production. Until now, very few studies were conducted to evaluate the baseline contents of trace elements in Cerrado wetland soils. Due to their position in the landscape (bottom lands), the wetlands are potentially susceptible to contamination by runoff and/or leaching from surrounding areas at […]

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CHROMIUM IN SOIL ORGANIC MATTER AND COWPEA AFTER FOUR CONSECUTIVE ANNUAL APPLICATIONS OF COMPOSTED TANNERY SLUDGE

Mara Lucia Jacinto Oliveira, Ademir Sérgio Ferreira de Araujo, Wanderley José de Melo

01/Jan/2015

Tannery sludge contains high concentrations of inorganic elements, such as chromium (Cr), which may lead to environmental pollution and affect human health The behavior of Cr in organic matter fractions and in the growth of cowpea (Vigna unguiculata L.) was studied in a sandy soil after four consecutive annual applications of composted tannery sludge (CTS). Over a four-year period, CTS was applied on permanent plots (2 × 5 m) and incorporated in the soil (0-20 cm) at the rates of […]

Quality reference values for heavy metals in soils of Rio Grande do Norte, Brazil

Welka Preston, Clistenes Williams Araújo do Nascimento, Caroline Miranda Biondi, Valdomiro Severino de Souza Junior, William Ramos da Silva, Hailson Alves Ferreira

01/Jun/2014

Industrial development and population growth have increased heavy metal concentrations in soils and impacted soil quality. In this scenario, environmental protection agencies have been concerned with establishing heavy metal quality reference values (QRV) that may identify contaminated sites. The study was carried out to provide soil reference values for the metals Ag, Ba, Cd, Co, Cr, Cu, Ni, Pb, Sb, V, and Zn in soils of the State of Rio Grande do Norte according to Brazilian legislation. The study analyzed […]

Comparison of digestion methods to determine heavy metals in fertilizers

Ygor Jacques Agra Bezerra da Silva, Clístenes Williams Araújo do Nascimento, Caroline Miranda Biondi, Welka Preston

01/Apr/2014

The lack of a standard method to regulate heavy metal determination in Brazilian fertilizers and the subsequent use of several digestion methods have produced variations in the results, hampering interpretation. Thus, the aim of this study was to compare the effectiveness of three digestion methods for determination of metals such as Cd, Ni, Pb, and Cr in fertilizers. Samples of 45 fertilizers marketed in northeastern Brazil were used. A fertilizer sample with heavy metal contents certified by the US National […]

Arsenic toxicity in Acacia mangium willd. and mimosa Caesalpiniaefolia benth. seedlings

Henrique Nery Cipriani, Luiz Eduardo Dias, Maurício Dutra Costa, Naiara Viana Campos, Aristéa Alves Azevedo, Roberto Junio Gomes, [...]

01/Oct/2013

Acacia mangium and Mimosa caesalpiniaefolia are fast-growing woody fabaceous species that might be suitable for phytoremediation of arsenic (As)-contaminated sites. To date, few studies on their tolerance to As toxicity have been published. Therefore, this study assessed As toxicity symptoms in A. mangium and M. caesalpiniaefolia seedlings under As stress in a greenhouse. Seedlings of Acacia mangium and M. caesalpiniaefolia were grown for 120 d in an Oxisol-sand mixture with 0, 50, 100, 200, and 400 mg kg-1 As, in […]

Natural concentrations of barium in benchmark soils of Pernambuco, Brazil

Caroline Miranda Biondi, Clístenes Williams Araújo do Nascimento, Adelazil de Brito Fabricio Neta

01/Oct/2011

Barium is an alkaline-earth metal that occurs naturally in soils. It is present in soil in carbonates, sulphates and silicates as well as in the isomorphic substitution of calcium and magnesium in clay minerals. When available at high soil concentrations, Ba is toxic to several living organisms. To rule out the possibility of metal contamination of a particular soil, the natural metal concentrations of this soil must be known. Therefore, the natural soil concentrations of metals must be determined for […]

Concentrations of Fe, Mn, Zn, Cu, Ni and Co in benchmark soils of Pernambuco, Brazil

Caroline Miranda Biondi, Clístenes Williams Araújo do Nascimento, Adelazil de Brito Fabricio Neta, Mateus Rosas Ribeiro

01/Jun/2011

Heavy metals are a group of elements with specific features and natural occurrence in the environment, representing an accessory in the formation of rocks. These elements, although associated with toxicity, must be treated different from xenobiotics, since many metals are evidentially essentials (Fe, Mn, Cu, Zn, and Ni) and beneficial (Co) for plants. In this context, the objective was to determine the natural contents of the metals iron (Fe), manganese (Mn), zinc (Zn), nickel (Ni), copper (Cu) and cobalt (Co) […]

CHemical and physical properties of organic residues

Fábio Satoshi Higashikawa, Carlos Alberto Silva, Wagner Bettiol

01/Oct/2010

Due to human activity, large amounts of organic residue are generated daily. Therefore, an adequate use in agricultural activities requires the characterization of the main properties. The chemical and physical characterization is important when planning the use and management of organic residue. In this study, chemical and physical properties of charcoal, coffee husk, pine-bark, cattle manure, chicken manure, coconut fiber, sewage sludge, peat, and vermiculite were determined. The following properties were analyzed: N-NH4+, N-N03–, and total concentrations of N, P, […]

Cadmium and lead availability to corn in soil amended with phosphorus fertilizers

Eriberto Vagner de Souza Freitas, Clístenes Williams Araújo do Nascimento, Daniel Franco Goulart, João Paulo Siqueira da Silva

01/Dec/2009

Phosphorus fertilizers are intensively used in Brazil, since the low availability of phosphorus often limits yields in tropical soils. However, these fertilizers can be a entranceway for soil contamination with heavy metals. This study was carried out to investigate heavy metal contamination caused by the application of five different phosphorus fertilizers as well as the metal uptake by corn (Zea mays) plants. The fertilizers simple superphosphate, triple superphosphate, Araxá rock phosphate, Yoorin thermophosphate, and Gafsa rock phosphate were applied at […]

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