scholarly journals Disponibilidade de metais pesados e sua correlação com a matéria orgânica do solo em áreas produtoras de hortaliças na Região Metropolitana de Belém/Pa / Availability of heavy metals and their correlation with a soil organic material in vegetable producing areas in the Metropolitan Region of Belém/Pa

2021 ◽  
Vol 7 (11) ◽  
pp. 109022-109032
Author(s):  
Nayara Kelly Feitosa Ferreira ◽  
Cássio Furtado Lima ◽  
Érica Bandeira Maués de Azevedo ◽  
Angleson Figueira Marinho ◽  
Fernanda de Oliveira Araújo ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Material ◽  
Metropolitan Region

scholarly journals Phytoextraction of heavy metals from a landfill in the metropolitan region of Belém-Pará-Brazil

2014 ◽  
Vol 57 (4) ◽  
pp. 429-438
Author(s):  
João Roberto Rosa e Silva ◽  
Antonio Rodrigues Fernandes ◽  
Daniel Vidal Perez
Keyword(s):  
Heavy Metals ◽  
Metropolitan Region

Bovine Bone Processing for Biofilter Application

2012 ◽  
Vol 727-728 ◽  
pp. 727-730 ◽  
Author(s):  
Omayra Ferreiro ◽  
Fatima Yubero ◽  
Roseli Marins Balestra ◽  
Marize Varella ◽  
Magna Monteiro
Keyword(s):  
Heavy Metals ◽  
Grain Size ◽  
Sorption Capacity ◽  
Organic Material ◽  
Bovine Bone ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bone Powder ◽  
Synthetic Hydroxyapatite ◽  
Powder Phase

This work involves the processing of bovine bone for use as biofilter collector of heavy metals in water. Before processing, it was necessary to clean the bone selected for removing the organic material adhered thereto. Drying was done in weathered during 18 days. Then the bones were calcined at a constant temperature of 750°C for 6 hour. The bone grinding was performed by means of an analytical mill in order to obtain a finer grain size. Once processed, the bovine bone powder was characterized by X-ray diffraction and fluorescence analyses. The results showed that the powder phase is less crystalline hydroxyapatite, when compared to highly crystalline synthetic hydroxyapatite, which favors the sorption capacity of lead by bovine bone.

scholarly journals Majors soil classes of the metropolitan region of Curitiba (PR), Brazil: II - interaction of Pb with mineral and organic constituents

2007 ◽  
Vol 50 (2) ◽  
pp. 183-192 ◽  
Author(s):  
Ana Christina Duarte Pires ◽  
Vander de Freitas Melo ◽  
Antônio Carlos Vargas Motta ◽  
Valmiqui Costa Lima
Keyword(s):  
Water Pollution ◽  
Heavy Metals ◽  
Organic Matter ◽  
Metropolitan Region ◽  
Maximum Adsorption Capacity ◽  
Leaching Potential ◽  
Ground Water Pollution ◽  
Factors Influencing ◽  
Plastic Bags ◽  
Soil Constituents

The interaction between heavy metals and soil constituents is one of the most important factors influencing the potential for ground water pollution. To study Pb behavior, samples of soils were incubated with a salt solution containing this metal. The experimental units consisted of plastic bags, partially opened with 0.1 dm³ of soil with three replications. After incubation, samples were subjected to sequential and selective extractions. Lead retention, measured by the maximum adsorption capacity of the soil, was relatively high with values ranging from 6,439 to 22,148 mg kg-1. The sequential and selective extractions showed that Pb adsorption was stable where the metal was found mainly in organic matter, Fe and Al oxides, and residual forms (specific adsorption). The capacity of the soils to retain Pb, thereby increasing the leaching potential of the metal, was in the sequence of: Histosol - Oxisol - Inceptisol.

Leachate Treatment Considerations in Cold Climates

2016 ◽  
Author(s):  
Sarah Partanen
Keyword(s):  
Heavy Metals ◽  
Organic Material ◽  
Treatment Process ◽  
Effect Of Temperature ◽  
Cold Climates ◽  
Leachate Treatment ◽  
Regulatory Standards ◽  
Treatment Considerations ◽  
Treatment Technologies

When water percolates through the solid waste in a landfill a leachate is generated that may contain dissolved organic material and heavy metals. Leachate can be treated in a variety of ways before being discharged, but parameters such as temperature can have an effect on the way leachate treatment is approached. In climates where the ambient temperature decreases during the winter months the leachate treatment process must be adapted to ensure the effluent being discharged meets all regulatory standards. This may include adding additional insulating elements to current technologies, or changing the technology used all together. This presentation will address the current issues associated with leachate treatment in cold climates including the effect of temperature on nitrification and denitrification. It will also examine the existing treatment technologies that are applicable for leachate treatment in cold climates and discuss their effectiveness based on the quality of the effluent being discharged.

scholarly journals ASSESSMENT OF HEAVY METAL FOCUSING ON CADMIUM, COPPER AND LEAD UPTAKE BY CROPS IN GREATER BANGKOK METROPOLITAN REGION, THAILAND

2020 ◽  
Vol 1 (40) ◽  
pp. 149-162
Author(s):  
Trang Huynh Thi Thu Thach ◽  
Son Phuoc Lai
Keyword(s):  
Heavy Metals ◽  
Inductively Coupled Plasma ◽  
Daily Intake ◽  
Metropolitan Region ◽  
Lead Uptake ◽  
Inductively Coupled ◽  
Significant Difference ◽  
Balance Analysis ◽  
Cadmium And Lead ◽  
Edible Parts

The objective of this study is to assess heavy metals, copper, cadmium and lead, uptake by food crops andvegetables grown in the greater Bangkok Metropolitan Region in Thailand. The three heavy metals were detected in three types of vegetables cultivated in three provinces Pathum Thani, Ayutthaya, and Nonthaburi representing Greater Bangkok Metropolitan Region (GBMR). An Inductively Coupled Plasma method was used to estimate and evaluate the levels of these metals’ concentration in the vegetables, soil, water, manure, and chemical fertilizer. The physical and chemical characterizations of which were conducted to compare the heavy metals concentrations with similar characteristics. Heavy metals concentrations were compared both in wetand dry season. Moreover, the edible and non-edible parts of the vegetables were also considered for the comparative study and found a significant difference in copper (Cu) concentrations in morning glory.The concentrations of Cu were found in edible and non-edible parts were 0.38 and 1.10 ug/g respectively. To account the flow of heavy metals concentration in  certain location, a mass balance analysis was conducted for the three different provinces, and found that about 18 mg of Cu accumulated in all three provinces. The cadmium (Cd) and lead (Pb) levels were found to be insignificant. The contributions of the vegetables to the daily intake of the heavy metals from the vegetables were determined.

Sampling and analysis of the air-water interface with SEM and EDS of microlayers

1989 ◽  
Vol 47 ◽  
pp. 1004-1005
Author(s):  
Randall W. Smith ◽  
John Dash
Keyword(s):  
Heavy Metals ◽  
Surface Microlayer ◽  
Surface Films ◽  
Water Interface ◽  
Physical Processes ◽  
Infrared Spectroscopic Analysis ◽  
Eds Analysis ◽  
Air Water Interface ◽  
Significant Area ◽  
Bulk Chemical

The structure of the air-water interface forms a boundary layer that involves biological ,chemical geological and physical processes in its formation. Freshwater and sea surface microlayers form at the air-water interface and include a diverse assemblage of organic matter, detritus, microorganisms, plankton and heavy metals. The sampling of microlayers and the examination of components is presently a significant area of study because of the input of anthropogenic materials and their accumulation at the air-water interface. The neustonic organisms present in this environment may be sensitive to the toxic components of these inputs. Hardy reports that over 20 different methods have been developed for sampling of microlayers, primarily for bulk chemical analysis. We report here the examination of microlayer films for the documentation of structure and composition.Baier and Gucinski reported the use of Langmuir-Blogett films obtained on germanium prisms for infrared spectroscopic analysis (IR-ATR) of components. The sampling of microlayers has been done by collecting fi1ms on glass plates and teflon drums, We found that microlayers could be collected on 11 mm glass cover slips by pulling a Langmuir-Blogett film from a surface microlayer. Comparative collections were made on methylcel1ulose filter pads. The films could be air-dried or preserved in Lugol's Iodine Several slicks or surface films were sampled in September, 1987 in Chesapeake Bay, Maryland and in August, 1988 in Sequim Bay, Washington, For glass coverslips the films were air-dried, mounted on SEM pegs, ringed with colloidal silver, and sputter coated with Au-Pd, The Langmuir-Blogett film technique maintained the structure of the microlayer intact for examination, SEM observation and EDS analysis were then used to determine organisms and relative concentrations of heavy metals, using a Link AN 10000 EDS system with an ISI SS40 SEM unit. Typical heavy microlayer films are shown in Figure 3.

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