SEGH Events

15th International Congress of the Geological Society of Greece

22 May 2019
Athens, Greece
The International Congresses of the Geological Society of Greece are multidisciplinary earth science events, focusing on, but not limited to, the broader Aegean region and its surroundings, with the view to highlighting the contribution of geosciences to the study of natural resources, natural hazards and environment.

The 15th International Congress of the Geological Society of Greece – GSG2019: “Understanding and Protecting our Living Planet Earth”, will be held at the premises of Harokopio University, Athens, Greece, between 22-24 May 2019. SEGH will be joint convening the special session T4.S1: Geochemical mapping for environmental and resource management.

(Image credit: GSG 2019)

Geochemical mapping for environmental and resource management (T4.S1)

(Jointly organized by the IUGS Commission on Global Geochemical Baselines (CGGB); the Society for Environmental Geochemistry and Health (SEGH); and the EuroGeoSurveys Geochemistry Expert Group)

Conveners: Ar. Argyraki, (NKUA), A. Liakopoulos (IGME), A. Demetriades (IUGS-CGGB)

Keynote Speakers: Anna Ladenberger, Geological Survey of Sweden and Andrew Hursthouse, Univ. of the West of Scotland, UK


Session description: Geochemical maps are the principal means of presenting the spatial distribution of chemical elements and compounds in materials occurring at or below the Earth’s surface. The patterns revealed by geochemical mapping can provide information on a wide range of Earth processes at different scales, from nanometres to thousands of kilometres.

For example, continental- and regional-scale geochemical projects can identify districts of enhanced mineral potential within which targeted exploration can be conducted. They also provide the geochemical baseline that is required to evaluate effectively local-scale environmental projects. Mapping at a sub-mineral-grain scale can provide a basis for understanding mineralisation processes and to determine optimal strategies for extraction of valuable target elements, while the sub-micron distribution of trace elements in Earth materials can provide insights into their speciation, environmental fate and bioavailability. The focus of the session will be on geochemical surveys at all mapping scales for the study of the environment and natural resources. Our main objective is to provide the opportunity for young researchers to present their work and benefit from the interaction with well- established applied geochemistry experts. We particularly welcome studies that have combined geochemical data with data from other sources in order to provide tools for effective environmental and resource management.

For more information, please visit the GSG 2019 website

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Science in the News

Latest on-line papers from the SEGH journal: Environmental Geochemistry and Health

  • Health risks and source identification of dietary exposure to indicator polychlorinated biphenyls (PCBs) in Lanzhou, China 2019-09-19

    Abstract

    Polychlorinated biphenyls (PCBs) are widely present in multiple environmental media even long after the phaseout, posing a health risk to the general population. Dietary intake is the major exposure route of PCBs; however, information is limited regarding PCBs in food that people directly consume. This study aims to measure personal exposure to indicator PCBs, evaluate the health risks, and identify their sources in a typical metropolitan city in China. Multi-day food samples were collected from 21 subjects in Lanzhou, Gansu Province, in two seasons using the duplicate plate method. Samples were extracted and analyzed for seven indicator PCBs using gas chromatography/mass spectrometry. Average daily doses (ADDs) of ∑7PCBs were estimated using Monte Carlo analysis with food intake information. Results show that PCB-118 and PCB-180 were the major congeners in food samples with average concentrations of 1.42 and 1.11 ng/g, respectively. The average (± SD) ADD of ∑7PCBs was 26.47 ± 22.10 ng/kg day among adults aged 18–69 years and displayed small variation across age groups. Comparing with the chronic RfD of 7 ng/kg day, 67% of people had their ADDs exceeding this threshold. The median cancer risk was 5.52 × 10−5, and 51% of residents had risks exceeding the action level of 10−4. The principal component analysis identified waste incineration, gasoline engine production, and leakage of #1 PCBs as the major PCBs sources. In conclusion, a large portion of Lanzhou residents has high non-cancer and cancer risks from dietary exposure to PCBs, which warrants control actions targeting these major sources.

  • Comprehensive assessment of heavy metals pollution of farmland soil and crops in Jilin Province 2019-09-18

    Abstract

    As a major agricultural province in China, it is necessary to study the content of heavy metals in farmland soil and crop in Jilin Province and to evaluate the risks to ecology and human health. This study presented the work completed on 79 soil samples, 10 rice samples, 66 maize samples and 15 soybean samples collected from Jilin Province farmland and evaluated six heavy metals (Zn, Cu, Pb, Cd, Hg and As) concentrations. The results showed that the concentrations of the six heavy metals in farmland soil and crop samples from Jilin Province basically met the soil standards and food health standards of China. The agricultural soil pollution spatial distribution was the most serious in the south of Jilin Province and the lightest in the west. The non-carcinogenic risks faced by children eating crops were higher than those of adults, but the carcinogenic risks were lower than those of adults. Both of the two health risks to adults and children from eating crops were very limited. The results would help determine the heavy metals pollution in farmland soil in Jilin Province efficiently and accurately and helped decision makers to achieve a balance between production and environmental regulation.

  • Sustainability of agricultural and wild cereals to aerotechnogenic exposure 2019-09-14

    Abstract

    In recent decades, the problem of the constantly increasin level of anthropogenic load on the environment is becoming more and more acute. Some of the most dangerous pollutants entering the environment from industrial emissions are heavy metals. These pollutants are not susceptible to biodegradation over time, which leads to their accumulation in the environment in dangerous concentrations. The purpose of this work is to study the sustainability of cultivated and wild plants of the Poaceae family to aerotechnogenic pollution in the soil. The content of heavy metals in couch grass (Elytrigia repens (L.) Nevski), meadow bluegrass (Poa pratensis L.) and soft wheat (Triticum aestivum) plants grown in the impact zone of Novocherkassk Power Station has been analyzed. Contamination of cultivated and wild cereals with Pb, Zn, Ni and Cd has been established. It has been shown that the accumulation of heavy metals is individual for each plant species. An average and close correlation have been established between the total HM content and the content of their mobile forms in the soil and their content in plants. For the plants studied, the translocation factor (TF) and the distribution coefficient (DC) of HM have been calculated. The TF is formed by the ratio of the concentration of an element in the root plant dry weight to the content of its mobile compounds in the soil. The DC value makes it possible to estimate the capacity of the aboveground parts of plants to absorb and accumulate elements under soil pollution conditions and is determined as the ratio of the metal content in the aboveground biomass to its concentration in the roots. TF and DC values have shown a significant accumulation of elements by plants from the soil, as well as their translocation from the root system to the aboveground part. It has been revealed that even within the same Poaceae family, cultural species are more sensitive to man-made pollution than wild-growing ones.