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Marcos Paula
Molecular Biology Lab., Department of Science and Languages, Bambuí Campus, Federal Institute of Minas Gerais, Bambuí 389000-000, Minas Gerais State, Brazil

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Journal article
Published: 26 June 2021 in Conservation
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Cement factories are the main sources of environmental pollutants among the different industrial activities, including soil contamination by potentially toxic metals. The karst region of Southeastern Brazil is known for the implementation of large cement producing facilities. This study aims to evaluate whether there is an increase in the concentration of PTM in the soil surrounding the cement plants and to estimate their harmfulness to both local human population and environment. In total, 18 soil samples were collected from the surroundings of three cement plants as well as four soil samples from areas outside the influence of cement plants and concentration of the following potentially toxic metals (PTM) were estimated: Cd, Pb, Co, Cu, Cr, Mn, Ni, and Zn. The results revealed that all PTM concentrations from cement plant surroundings were significantly higher than PTM concentrations from control areas and no PTM concentrations from CPS or CA soil samples exceeded national and global contamination thresholds. However, Igeo Index indicated low level soil contamination by Pb, Cu, and Cr, as well as high levels for Co. We could not verify significant non-carcinogenic risk to health for any soil sample, but carcinogenic risk analysis revealed different levels of carcinogenic risk among the sampled locations, for both adults and children. Our results indicate that exclusively evaluating the concentration of potentially toxic metals is not enough to verify the potential harmful effects of cement production for the surrounding population. Here we evidence that additional indices, based on both contamination indices and health risk assessments, should be considered for better evaluation of the impacts of cement production activity.

ACS Style

Thiago Silva; Marcos Paula; Washington Silva; Gustavo Lacorte. Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil. Conservation 2021, 1, 137 -150.

AMA Style

Thiago Silva, Marcos Paula, Washington Silva, Gustavo Lacorte. Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil. Conservation. 2021; 1 (3):137-150.

Chicago/Turabian Style

Thiago Silva; Marcos Paula; Washington Silva; Gustavo Lacorte. 2021. "Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil." Conservation 1, no. 3: 137-150.

Journal article
Published: 31 May 2021 in Conservation
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Sustainable use of freshwater resources for human civilization needs requires the assessment and monitoring of freshwater health, and bacterial communities from riverbed sediments have been shown to be susceptible to chronic anthropogenic disturbances in freshwater ecosystems. Here, we took advantage of the occurrence of well-recognized adjacent sections from the Upper São Francisco River basin with well-recognized levels of anthropogenic activity intensity to test the applicability of sediment bacterial communities as bioindicators of impacts on freshwater ecosystems. We applied 16S amplicon sequencing to estimate the diversity and composition of bacterial communities from 12 sampling sites across the Upper São Francisco River basin, classified as being of no, low, or high intensity of anthropogenic activities, and used diversity metrics and LEfSe to compare the patterns of community structure. Our results revealed that accessed sediment environments associated with land areas with a high intensity of anthropogenic activities presented the lowest levels of community diversity, and the bacterial community compositions of these environments were significantly different from the other sampled areas. Our findings can be considered a source of evidence for the usefulness of bacterial community-based approaches as a tool for diagnosis and monitoring of ecosystem health in areas of vulnerable freshwater environments, and can even be incorporated into regular water quality programs.

ACS Style

Marcos de Paula; Thiago Costa Silva; Amanda Araújo; Gustavo Lacorte. Assessments of Bacterial Community Shifts in Sediments along the Headwaters of São Francisco River, Brazil. Conservation 2021, 1, 91 -105.

AMA Style

Marcos de Paula, Thiago Costa Silva, Amanda Araújo, Gustavo Lacorte. Assessments of Bacterial Community Shifts in Sediments along the Headwaters of São Francisco River, Brazil. Conservation. 2021; 1 (2):91-105.

Chicago/Turabian Style

Marcos de Paula; Thiago Costa Silva; Amanda Araújo; Gustavo Lacorte. 2021. "Assessments of Bacterial Community Shifts in Sediments along the Headwaters of São Francisco River, Brazil." Conservation 1, no. 2: 91-105.