Geochemical Background in an Oxisol

Cembranel, Adir Silvério; Sampaio, Sílvio César; Remor, Marcelo Bevilacqua; Gotardo, Jackeline Tatiane; Rosa, Pábolla Monicki Dalla

doi:10.1590/1809-4430-eng.agric.v37n3p565-573/2017

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…This lake was created in 1980, rectified in 1996, and dredged in 2010. Currently, land use and occupation in its drainage area are predominantly urban (70%), but with preservation areas (23%) (Cembranel et al 2017).…”

Section: Study Areamentioning

confidence: 99%

Residue Analysis of Organochlorine and Organophosphorus Pesticides in Urban Lake Sediments

Cembranel¹,

Frigo²,

Sampaio³

et al. 2017

Eng. Agríc.

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ABSTRACT:The knowledge of pesticide residual concentrations in the environment is important to understand the threats to the environment and human health, especially when natural resources are used for human consumption. In this context, this study aimed to assess the potential ecological risk and respective sources of sediment contamination by organochlorine and organophosphorus pesticides. The study site was an urban lake located in Cascavel city, western Paraná state, Brazil, where the history of land use and occupation in the urban environment is typically agricultural. Surface sediment samples were collected every three months from April 2010 to June 2013 at five different collection points, totaling 65 samples. Analyses showed that contamination by organochlorine pesticides is related to agricultural activities in the past, with a low ecological risk to benthic organisms. Conversely, organophosphorus pesticides presented a recent and continuous contamination from urban activities, with a risk coefficient, especially for disulfoton, indicating a significant potential adverse effect on organisms. However, in general, the obtained results did not indicate an immediate risk to public health.

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Section: Study Areamentioning

confidence: 99%

Residue Analysis of Organochlorine and Organophosphorus Pesticides in Urban Lake Sediments

Cembranel¹,

Frigo²,

Sampaio³

et al. 2017

Eng. Agríc.

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“…According to the treatments applied in each crop cycle (KESSLER et al, 2014), three distinct soil types were selected for sample collection: control without fertilization (C), soil treated with mineral fertilizer (MF) according to the needs of each crop, and soil treated with organic fertilizer [300 m 3 ha -1 of swine wastewater (SW)]. Maize (variety CD 316, extraearly hybrid, for off-season production) was used as the bait plant, and the soil of the study area was classified as Red Dystroferric Latosol (CEMBRANEL et al, 2017).…”

Section: Methodsmentioning

confidence: 99%

Isolation of phosphate-solubilizing bacteria from subtropical soils with different fertilization histories

et al. 2020

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Phosphorus is one of the most abundant chemical elements but has a low bioavailability index. Therefore, microrganisms play a fundamental role in providing insoluble phosphorus to plants. The objective of this study was to evaluate the capacity of bacteria to solubilize inorganic phosphates in soils with different fertilization histories. Soil and rhizosphere samples were collected from a Red Distroferric Latosol, including a control without mineral or organic fertilizer (C), treatment with mineral fertilizer (MF) according to the needs of each crop, and treatment with organic fertilizer [300 m3 ha-1 of swine wastewater (SW)]. The medium containing calcium phytate presented more colony-forming units (CFU) for all fertilization histories, and growth in treatments C and MF was 50% higher than treatment with SW. CFU values in soils treated with SW were lower than those in the other treatments, and the diversity of insoluble phosphate-solubilizing bacteria (PSB) was higher in treatment C. These results indicate a negative relationship between phosphorus concentrations and the number of PSB.

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“…The positive correlation between the finer portion of sediments (silt and clay) and Hg contents (Figure 3) is due to the larger surface area of fine particles, increasing their adsorption capacity (Oliveira et al, 2011;Cembranel et al, 2017b). Thus, clay is considered an important factor for Hg adsorption in soils and sediments (Araujo et al, 2015).…”

Section: Resultsmentioning

confidence: 99%

Mercury in the Sediment of Pelotas River Basin, Brazil

et al. 2018

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Many studies have determined the concentration of trace elements in river sediments in Brazil. Notwithstanding, mercury assessments are scarce, especially because of exclusive extraction techniques and expensive analysis techniques. Still, this element is known for its toxicity, persistence, and bioaccumulation, making its presence in the environment an important factor for biota and human health. For this reason, the objective of this study was to determine the mercury concentration in the sediment of the Pelotas River basin, located on the border of the states of Santa Catarina and Rio Grande do Sul. The sediment was collected at eight locations of the Pelotas basin and, after drying, the mercury was quantified by atomic absorption spectrometry based on the Zeeman-background correction, coupled to a pyrolysis reactor. The mercury concentrations in the sediments of the Pelotas River varied from 40.5 ng g-1 to 62.0 ng g-1 and presented a positive correlation with the fraction of silt and clay. The concentrations of mercury found in sediments of the Pelotas River basin have a low probability of negatively affecting the biota. Nonetheless, given the persistence and bioaccumulation potential of this element, the aforementioned region needs further studies to quantify the risks it may cause on the local biota and human health.

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Geochemical Background in an Oxisol

Cited by 14 publications

References 22 publications

Residue Analysis of Organochlorine and Organophosphorus Pesticides in Urban Lake Sediments

Residue Analysis of Organochlorine and Organophosphorus Pesticides in Urban Lake Sediments

Isolation of phosphate-solubilizing bacteria from subtropical soils with different fertilization histories

Mercury in the Sediment of Pelotas River Basin, Brazil

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