Hazardous elements and amorphous nanoparticles in historical estuary coal mining area

Duarte, Ana L.; DaBoit, Kátia; Oliveira, Marcos L.S.; Teixeira, Elba Calesso; Schneider, Ismael L.; Silva, Luis

doi:10.1016/j.gsf.2018.05.005

Cited by 82 publications

(9 citation statements)

References 54 publications

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“…Under low pH conditions Cd, Ni and Zn form electrostatic bonds with clay minerals and organic matter, with their exchangeable and soluble forms favoured which can cause losses by leaching (Duarte et al 2019). Evaluating the leachate from the coal residue of SC, Silva et al (2011) found Mn, Zn, Cu, Co and Ni as the main elements leached under low pH conditions, whereas Cd and Zn were found at higher levels than the average of the world's coals, occurring mainly in pyrite and alternatively in some clay minerals.…”

Section: Discussionmentioning

confidence: 99%

Ferns and Licophytes in Coal Mining Waste and Tailing Landfills

Andreola

Rosini

Campos

et al. 2021

Preprint

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Mineral coal extraction in Santa Catarina State (Brazil) Carboniferous Basin has degraded the local ecosystem, restricting the use of its areas. One of the biggest environmental impacts in the mining areas is the uncontrolled disposal of waste and sterile mining with high concentrations of pyrite, which in the presence of air and water is oxidized promoting the formation of acid mine drainage (AMD). These contaminants can be leached into water resources, restrict the use of water, soil and cause threats to fauna and flora. This study aimed to characterize these areas as to the content of Cd, Pb, Ni and Zn metals in the tailings and waste resulting from coal mining and to survey the species of ferns and lycophytes present. Wastes and tailing samples and specimens of ferns and lycophytes were collected in 23 landfills in six municipalities in the region and in four underlying areas used as controls. Chemical and physical analyses (pH in water and pH in KCl, Ca, Mg, P, K, Na, Mn, Fe, Al, clay and OM contents) were carried out and the total contents of heavy metals Cd, Pb were determined, Ni and Zn. Sampling of ferns and lycophytes was carried out by walking. The levels of heavy metals, Cd, Ni and Zn were below the prevention concentrations established by CONAMA Resolution 420/2009. Pb levels were above prevention values in four landfills. Sixteen species of ferns and one lycophyte were found, with hemicryptophytes the most frequent and helophytes the most adapted to the environment. Of the species found, Pteridium esculentum (G. Forst.) Cockayne, Pityrogramma calomelanos (L.) Link and Telmatoblechnum serrulatum (Rich.) Perrie, DJ Ohlsen & Brownsey demonstrated resistance to degraded and contaminated environments with Pb, which may constitute an alternative for projects monitoring and environmental recovery.

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Section: Discussionmentioning

confidence: 99%

Ferns and Licophytes in Coal Mining Waste and Tailing Landfills

Andreola

Rosini

Campos

et al. 2021

Preprint

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“…Detailed characterization equipment and conditions are reported in previous articles of our group (Dotto et al 2012;Fröhlich et al 2019;Meili et al 2019a). Some studies previously reported similar analytical procedures (Duarte et al 2019;Ferrari et al 2019;Gasparotto et al 2019;Gredilla et al 2019;Saikia et al 2018;Oliveira et al 2019aOliveira et al , 2019b.…”

Section: Synthesis and Characterization Of Cbs Bcc And Bacbmentioning

confidence: 99%

Adsorption of atrazine and 2,4-D pesticides on alternative biochars from cedar bark sawdust (Cedrella fissilis)

Hernandes

Franco

Georgin

et al. 2021

Environ Sci Pollut Res

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Bark residues of the forest species Cedrela fissilis were physically and chemically modified with zinc chloride (ZnCl 2 ) as an activating agent. The two modified materials were analyzed as adsorbents in removing atrazine and 2,4-D herbicides from effluents. Firstly, the precursor material and the modified ones were characterized by different techniques to identify the structural changes that occurred in the surfaces. Through TGA, it was observed that both modified materials have thermal stability close to each other and are highly superior to the precursor. X-ray diffractions proved that the amorphous structure was not altered, the three materials being highly heterogeneous and irregular. The micrographs showed that the treatments brought new spaces and cavities on the surface, especially for the material carbonized with ZnCl 2 . The pH PZC of the modified materials was close to 7.5. The physically modified material had a surface area of 47.31 m 2 g −1 and pore volume of 0.0095 cm 3 g −1 , whereas the carbonized material had a surface area of 98.12 m 2 g −1 and pore volume of 0.0099 cm 3 g −1 . Initial tests indicated that none of the adsorbents were efficient in removing 2,4-D. However, they showed good potential for removing atrazine. The Koble-Corrigan isothermal model best fits the experimental data, with a maximum capacity of 3.44 mg g −1 and 2.70 mg g −1 for physically modified and with ZnCl 2 , respectively. The kinetic studies showed that the system tends to enter into equilibrium after 120 min, presenting good statistical indicators to the linear driving force model (LDF). The surface diffusion coefficients were 2.18×10 −9 and 2.37×10 −9 cm 2 s −1 for atrazine adsorption on the physically and chemically modified materials. These results showed that the application of residues from the processing of cedar bark is promising. However, new future studies must be carried out to improve the porous development of the material and obtain greater adsorption capacities.

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“…Although effluent and sludge reuse can address the perennial water scarcity, reduce the water demand, enhance nutrient recycling, improve soil health, mitigate the indiscriminate discharge of pollutants into waterways, and climate change impact; however, these environmental materials need to be carefully managed to prevent the associated environmental, ecological, and public health risks (Hanjra et al, 2012a; Elmi et al, 2020 , Adelodun et al, 2021d ). It is expected that the use of effluent and sludge in agriculture will increase greatly in the future; hence a need for proper guidelines to forestall any associated risks in their usage ( Duarte et al, 2019 , Ferrari et al, 2019 , Akinyemi et al, 2020 , Dalmora et al, 2020 , Dutta et al, 2020 , Oliveira et al, 2020 , Sellaoui et al, 2021a ).…”

Section: Global Scenario Of Effluent Sludge and Biosolids Generation ...mentioning

confidence: 99%

A safe haven of SARS-CoV-2 in the environment: Prevalence and potential transmission risks in the effluent, sludge, and biosolids

Adelodun¹,

Kumar²,

Odey³

et al. 2022

Geoscience Frontiers

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Hazardous elements and amorphous nanoparticles in historical estuary coal mining area

Cited by 82 publications

References 54 publications

Ferns and Licophytes in Coal Mining Waste and Tailing Landfills

Ferns and Licophytes in Coal Mining Waste and Tailing Landfills

Adsorption of atrazine and 2,4-D pesticides on alternative biochars from cedar bark sawdust (Cedrella fissilis)

A safe haven of SARS-CoV-2 in the environment: Prevalence and potential transmission risks in the effluent, sludge, and biosolids

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