• SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community.

  • SEGH

    Diverse scientific fields and multidisciplinary expertise brought together within an international community

Society for Environmental Geochemistry and Health

SEGH was established in 1971 to provide a forum for scientists from various disciplines to work together in understanding the interaction between the geochemical environment and the health of plants, animals, and humans. We recognise the importance of interdisciplinary research. SEGH members represent expertise in a diverse range of scientific fields, such as biology, engineering, geology, hydrology, epidemiology, chemistry, medicine, nutrition, and toxicology.

 

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SEGH Articles

Geochemistry in Africa

| January 2017

Read about VicFalls 2018 and fieldwork in the Copperbelt  continue reading...

ISEH 2016, ISEG 2016 & Geoinformatics 2016

| January 2017

Joint International Conference on Environment, Health, GIS and Agriculture Galway, Ireland, August 14 20, 2016  continue reading...

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Science in the News

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

  • Determining soil quality in urban agricultural regions by soil enzyme-based index 2017-06-26

    Abstract

    Urban agricultural soils are highly variable, and careful selection of sensitive indicators is needed for the assessment of soil quality. This study is proposed to develop an index based on soil enzyme activities for assessing the quality of urban agricultural soils. Top soils were collected from urban agricultural areas of Korea, and soil chemical properties, texture, microbial fatty acids, and enzyme activities were determined. The soils belonged to five textural classes with the highest frequency of sandy loam. There was no clear correlation between the soil chemical properties and soil microbial properties. Principal component analysis (PCA) and factor analysis were applied to microbial groups for identification of microbial community variation in soils. Two soil groups, namely group 1 (G1) and group 2 (G2), based on microbial community abundance were examined by PCA, and those were more prominent in factor analysis. The G1 soils showed higher microbial community abundance than G2 soils. The canonical discriminant analysis was applied to the enzyme activities of sandy loam soil to develop an index, and the index validation was confirmed using the unused soils and published data. The high-quality soils in published literature assigned the high valued index. Microbial fatty acids and soil enzyme activities can be suitable indicators for soil quality evaluation of urban agricultural soils.

  • Study of the interactions of dissolved organic matter with zinc ion and the impact of competitive metal ions (Ca 2+ and Mg 2+ ) by in situ absorbance 2017-06-22

    Abstract

    The bioavailability and toxicity of zinc to aquatic life depend on dissolved organic matter (DOM), such as Suwannee River Fulvic Acid (SRFA), which plays an important role in the speciation of zinc. This study examined reactions of SRFA with zinc at different concentrations from pH 3.0 to 9.0, and competitive binding of calcium/magnesium and zinc to SRFA at pH 6.0, using in situ absorbance. Interactions of Zn2+ with SRFA chromophores were evidenced by the emergence of features in Zn-differential spectra. Among all Zn2+–SRFA systems, dominant peaks, located at 235, 275 and 385 nm, and the highest intensity at 235 nm indicated the replacement of protons by the bound Zn2+. The Zn2+ binding with SRFA could be quantified by calculating the changes of the slopes of Zn-differential log-transformed absorbance in the wavelength range of 350–400 nm (denoted as DS350–400) and by comparing the experimental data with predictions using the Non-Ideal Competitive Adsorption (NICA–Donnan) model. DS350–400 was correlated well with the bound Zn2+ concentrations predicted by NICA–Donnan model with or without Ca2+ or Mg2+. Ca2+ and Mg2+ only affect intensity of the Zn-differential and Zn-differential log-transformed absorbance, not shape. In situ absorbance can be used to gain further information about Men+–DOM interactions in the presence of various metals.

  • Blood concentrations of lead, cadmium, mercury and their association with biomarkers of DNA oxidative damage in preschool children living in an e-waste recycling area 2017-06-16

    Abstract

    Reactive oxygen species (ROS)-induced DNA damage occurs in heavy metal exposure, but the simultaneous effect on DNA repair is unknown. We investigated the influence of co-exposure of lead (Pb), cadmium (Cd), and mercury (Hg) on 8-hydroxydeoxyguanosine (8-OHdG) and human repair enzyme 8-oxoguanine DNA glycosylase (hOGG1) mRNA levels in exposed children to evaluate the imbalance of DNA damage and repair. Children within the age range of 3–6 years from a primitive electronic waste (e-waste) recycling town were chosen as participants to represent a heavy metal-exposed population. 8-OHdG in the children’s urine was assessed for heavy metal-induced oxidative effects, and the hOGG1 mRNA level in their blood represented the DNA repair ability of the children. Among the children surveyed, 88.14% (104/118) had a blood Pb level >5 μg/dL, 22.03% (26/118) had a blood Cd level >1 μg/dL, and 62.11% (59/95) had a blood Hg level >10 μg/dL. Having an e-waste workshop near the house was a risk factor contributing to high blood Pb (r s  = 0.273, p < 0.01), while Cd and Hg exposure could have come from other contaminant sources. Preschool children of fathers who had a college or university education had significantly lower 8-OHdG levels (median 242.76 ng/g creatinine, range 154.62–407.79 ng/g creatinine) than did children of fathers who had less education (p = 0.035). However, we did not observe a significant difference in the mRNA expression levels of hOGG1 between the different variables. Compared with children having low lead exposure (quartile 1), the children with high Pb exposure (quartiles 2, 3, and 4) had significantly higher 8-OHdG levels (β Q2 = 0.362, 95% CI 0.111–0.542; β Q3 = 0.347, 95% CI 0.103–0.531; β Q4 = 0.314, 95% CI 0.087–0.557). Associations between blood Hg levels and 8-OHdG were less apparent. Compared with low levels of blood Hg (quartile 1), elevated blood Hg levels (quartile 2) were associated with higher 8-OHdG levels (β Q2 = 0.236, 95% CI 0.039–0.406). Compared with children having low lead exposure (quartile 1), the children with high Pb exposure (quartiles 2, 3, and 4) had significantly higher 8-OHdG levels.