scholarly journals Establishment and evaluation of a quantitative analysis model for potentially toxic metals in wet soil samples by LIBS

2022 ◽  
Author(s):  
Yuxing Xu ◽  
Bing Han ◽  
Xin Tan ◽  
Qingbin Jiao ◽  
Zhenyu Ma ◽  
...  
Keyword(s):  
Quantitative Analysis ◽  
Toxic Metals ◽  
Soil Samples ◽  
Analysis Model ◽  
Potentially Toxic Metals

Deposition of potentially toxic metals in the soil from surrounding cement plants in a karst area of Southeastern Brazil

2021 ◽  
Author(s):  
Thiago Augusto da Costa e Silva ◽  
Marcos de Paula ◽  
Washington Santos Silva ◽  
Gustavo Augusto Lacorte
Keyword(s):  
Soil Contamination ◽  
Toxic Metals ◽  
Environmental Pollutants ◽  
Carcinogenic Risk ◽  
Soil Samples ◽  
Karst Area ◽  
Southeastern Brazil ◽  
Karst Region ◽  
Potentially Toxic Metals ◽  
Cement Production

Abstract Cement factories are the main sources of environmental pollutants among the different industrial activities, including soil contamination by potentially toxic metals and 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 and 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.

scholarly journals Deposition of Potentially Toxic Metals in the Soil from Surrounding Cement Plants in a Karst Area of Southeastern Brazil

Conservation ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 137-150
Author(s):  
Thiago Augusto da Costa Silva ◽  
Marcos de Paula ◽  
Washington Santos Silva ◽  
Gustavo Augusto Lacorte
Keyword(s):  
Soil Contamination ◽  
Toxic Metals ◽  
Environmental Pollutants ◽  
Carcinogenic Risk ◽  
Soil Samples ◽  
Karst Area ◽  
Southeastern Brazil ◽  
Karst Region ◽  
Potentially Toxic Metals ◽  
Cement Production

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.

scholarly journals Accumulation of Potentially Toxic Metals in Egyptian Alluvial Soils, Berseem Clover (Trifolium alexandrinum L.), and Groundwater after Long-Term Wastewater Irrigation

Agriculture ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 713
Author(s):  
Ahmed S. Abuzaid ◽  
Hossam S. Jahin ◽  
Amany A. Asaad ◽  
Mohamed E. Fadl ◽  
Mohamed A. E. AbdelRahman ◽  
...  
Keyword(s):  
Toxic Metals ◽  
Translocation Factor ◽  
Wastewater Irrigation ◽  
Alluvial Soils ◽  
Trifolium Alexandrinum ◽  
Potentially Toxic Metals ◽  
Groundwater Samples ◽  
Safe Limits ◽  
Berseem Clover ◽  
Irrigated Soils

The reduced availability of water resources in Egypt has imposed the need to intensify the use of wastewater for crop irrigation in the alluvial soils of anthropogenic origin. Relevant effects can derive from contents of potentially toxic metals (PTMs) in supply resources soils, crops, and groundwater in these areas. For this reason the PTM content has to be monitored to evaluate and minimize health hazards. Therefore, in this context, two areas of the SE Nile Delta subjected to 25 year of wastewater irrigation, using agricultural drainage water (ADW) and mixed wastewater (MWW) were chosen and compared with a nearby site irrigated with Nile freshwater (NFW). At each of the three sites, ten samples of irrigation water, topsoil, berseem clover (Trifolium alexandrinum L.) plants, and seven groundwater samples were collected and analyzed for Cr, Co, Cu, Pb, Ni, and Zn. Results indicate that the total contents of Co, Cu, Ni, and Zn in soils collected from the three sampling sites and Pb in the MWW-irrigated soils were higher than their average natural contents in the earth’s crust, indicating potential risks. The DTPA-extractable contents of Cu in the three sites, in addition to Pb and Zn in the MWW-irrigated soils, exceeded the safe limits. The MWW-irrigated soils showed a considerable degree of metal contamination, while the NFW- and ADW-irrigated soils showed moderate and low levels of contamination, respectively. The contents of the six PTMs in the three sites showed low individual ecological risks, except for Pb in the MWW-irrigated soils that showed a moderate risk; however, the overall ecological risk remained low in all samples. The values of Co, Cu, and Ni in berseem shoot in addition to Pb from the MWW-irrigated soils were over the maximum permissible levels for animal feeding. Values of root-to-shoot translocation factor were lower than 1.0 for Cr, Co and Ni but higher than 1.0 for Cu, Pb, and Zn. Berssem plant is a good candidate for phytofiltration of Cr, Co and Ni, while for extracting Cu, Pb and Zn from polluted soils. The groundwater samples collected from the three sampling sites showed lower metal concentrations than the safe limits for drinking standards. Further remediation studies should be taken into account to alleviate potential environmental and health-related risks when using supply resources different from freshwater.

Potentially Toxic Metals in Soil and Dominant Plants from Tonglushan Cu–Fe Deposit, Central China

2018 ◽  
Vol 102 (1) ◽  
pp. 92-97 ◽  
Author(s):  
Huang Zheng ◽  
Zezhou Zhang ◽  
Xinli Xing ◽  
Tianpeng Hu ◽  
Chengkai Qu ◽  
...  
Keyword(s):  
Toxic Metals ◽  
Central China ◽  
Potentially Toxic Metals

scholarly journals Microscopic Fungi in Big Cities: Biodiversity, Source, and Relation to Pollution by Potentially Toxic Metals

Atmosphere ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1471
Author(s):  
Maria V. Korneykova ◽  
Anastasia S. Soshina ◽  
Andrey I. Novikov ◽  
Kristina V. Ivashchenko ◽  
Olesya I. Sazonova ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Toxic Metals ◽  
Road Dust ◽  
Airborne Fungi ◽  
Potentially Toxic Metals ◽  
Opportunistic Fungi ◽  
Air Quality Assessment ◽  
Relationship Of ◽  
First Time ◽  
The Relationship

For the first time, a mycological analysis of outdoor urban environment (air, leaves, sealed surfaces) was carried in the cities of subarctic (Murmansk) and temperate (Moscow) climatic zones. The chemical composition of dust deposited on leaves of dominant tree species was taken as an indicator of the air quality. Assessment of the complex impact of factors (climate zone, type of substrate, anthropogenic load) on the quantitative and qualitative parameters of mycobiome was performed. Compared to Moscow, Murmansk was characterized by an increased number and concentrations of pollutants in the deposited dust. The number of culturable airborne fungi in Murmansk was substantially lower than in Moscow. Half of the species belonged to the opportunistic in both cities. Most dangerous opportunistic fungi were absent in the air of recreational zones but present on leaves surface and in road dust in all assessed zones of the cities. Dust chemical composition affected the diversity of fungi species. While the relationship of biological parameters with concentration of potentially toxic metals was generally negative, Cd increased the fraction of opportunistic fungi in road dust. The study revealed an importance of substrate in determining the sensitivity of outdoor mycobiome to pollution and highlighted its biological characteristics sensitive to climate.

scholarly journals Evaluación de la implementación de materiales didácticos en Ciencias Sociales: propuestas para el desarrollo de la competencia social y ciudadana

2019 ◽  
Vol 22 (2) ◽  
Author(s):  
Rodrigo Arturo Salazar Jiménez
Keyword(s):  
Social Sciences ◽  
Quantitative Analysis ◽  
Learning Objectives ◽  
Teaching Staff ◽  
Analysis Model ◽  
Citizen Competence ◽  
Positive Evaluation

La información que se presenta en este artículo se centra en la evaluación de la implementación de cinco propuestas didácticas en Ciencias Sociales, para el desarrollo de la competencia Social y Ciudadana, particularmente en la percepción del profesorado sobre el material propuesto. Los resultados se obtuvieron por medio de encuestas que los y las docentes de nueve institutos de Cataluña debían responder antes de aplicar las unidades didácticas y después de cada una de las sesiones. El procesamiento de la información se realizó con un modelo de análisis cuantitativo con el uso del programa Excel. Entre los principales resultados que podemos destacar de la información entregada por los nueves docentes que aplicaron el material: el profesorado hace una evaluación positiva de las unidades didácticas; las actividades son motivadoras para el alumnado; por último, que para los y las docentes el material resulta útil para conseguir los objetivos de aprendizaje propuestos al alumnado.   The information presented in this article focuses on the evaluation of the implementation of five didactic proposals in Social Sciences, for the development of Social and Citizen competence, particularly in the perception of the teaching staff about the proposed material. The results were obtained through surveys that the teachers of nine institutes in Catalonia had to answer before applying the teaching units and after each of the sessions. The processing of the information was done with a quantitative analysis model with the use of the Excel program. Among the main results we can highlight the information provided by the nine teachers who applied the material: the teachers make a positive evaluation of the teaching units; the activities are motivating for the students; finally, that for teachers the material is useful to achieve the learning objectives proposed to the students.

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