SEGH Articles

32nd International SEGH conference, Brussels 2016

17 November 2015
32nd International SEGH conference, Universite Libre de Bruxelles, Brussels, Belgium, 4th-8th July, 2016.

Dear All,

On behalf of the Organising Committee of the 32nd International SEGH conference, I would like to invite you to join us at the Universite Libre de Bruxelles, Brussels, Belgium, 4th-8th July, 2016. http://segh-brussels.sciencesconf.org

This annual conference of the Society for Environmental Geochemistry and Health provides a forum for international scientists, consultants, regulatory authorities and other practitioners (public health / environmental health) with an interest in the links between environment and health and working in the broad area of environmental geochemistry. For the 32nd SEGH we are keen to receive contributions on three core themes and three special sessions:

• Theme 1 – Dust and Aerosol: Environmental records of Anthropogenic

• Theme 2 – Isotopes and Speciation

• Theme 3 – Geochemistry and Health

• Special Session 1 – SpatioTemporal Trends of Metal Contaminants in the Atmosphere

• Special Session 2 – Nanoparticles in the Environment: Fate and Effects

• Special Session 3 – Geochemistry and Biomedical Issues

The conference venue is the city campus of Université Libre de Bruxelles, in the heart of the city of Brussels, Belgium, will offer you the opportunity to visit an amazing cultural heritage, rich in European History, to taste a fascinating cuisine (chocolates, beers, ...), and participate to the Belgian life style. The venue takes benefit of accessibilities from much of the world, and numerous good-quality affordable accommodations.

My research Lab, Laboratoire G-Time (http://gtime.ulb.ac.be/ ), will be very happy to welcome you and offer you the opportunity to visit our analytical facilities. Our research focuses on applications of radiogenic and non-traditional stable isotopes in geosciences (Environmental Geochemistry, Mantle Geodynamics and Cosmochemistry). My main research interest is dedicated to the Biogeochemistry of Metal Trace Elements in the Environment. The core of our work remains the applications of non-traditional stable isotopes (Zn, Cd, Cu, Fe) in addition to traditional radiogenic isotopes (Pb, Hf, Nd, ...), as tracers of sources and processes of global biogeochemical cycles, environmental pollution and paleo-environmental reconstruction.

Activities and Climate Changes

Tracing Transfer Processes in the Critical Zone

Young scientist contributions are especially encouraged and special awards will be given out by the SEGH for the best poster and talk.

Please save these key dates in your diary. More information will follow...

We look forward to welcoming you to Brussels in 2016.

Best Regards,

Nadine Mattielli [SEGH 2016 Chair]

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

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    Abstract

    The objectives were to investigate the potential remedial measures for reverse osmosis (RO) rejected water through constructed wetlands (CWs) with low-cost materials in the media established in chronic kidney disease of unknown etiology (CKDu) prevalent area in Sri Lanka. A pilot-scale surface and subsurface water CWs were established at the Medawachchiya community-based RO water supply unit. Locally available soil, calicut tile and biochar were used in proportions of 81, 16.5 and 2.5% (w/w), respectively, as filter materials in the subsurface. Vetiver grass and Scirpus grossus were selected for subsurface wetland while water lettuce and water hyacinth were chosen for free water surface CWs. Results showed that the CKDu sensitive parameters; total dissolved solids, hardness, total alkalinity and fluoride were reduced considerably (20–85%) and most met desirable levels of stipulated ambient standards. Biochar seemed to play a major role in removing fluoride from the system which may be due to the existing and adsorbed K+, Ca+2, Mg+2, etc. on the biochar surface via chemisorption. The least reduction was observed for alkalinity. This study indicated potential purification of aforesaid ions in water which are considerably present in RO rejection. Therefore, the invented bio-geo constructed wetland can be considered as a sustainable, economical and effective option for reducing high concentrations of CKDu sensitive parameters in RO rejected water before discharging into the inland waters.

  • Medical geology of endemic goiter in Kalutara, Sri Lanka; distribution and possible causes 2017-12-01

    Abstract

    This study assesses the distribution of goiter in the Kalutara District, Sri Lanka in order to find causative factors for the occurrence of goiter even after the salt iodization. A questionnaire survey was conducted at the household level and at the same time iodine and selenium levels of the water sources were analyzed. Questionnaire survey results indicated the highest numbers of goiter patients in the northern part where the lowest were found in the southern sector which may be due to the presence of acid sulfate soils. Females were more susceptible and it even showed a transmittance between generations. Average iodine concentrations in subsurface water of goiter endemic regions are 28.25 ± 15.47 μg/L whereas non-goiter regions show identical values at 24.74 ± 18.29 μg/L. Surface water exhibited relatively high values at 30.87 ± 16.13 μg/L. Endemic goiter was reported in some isolated patches where iodine and selenium concentrations low, latter was <10 μg/L. The formation of acid sulfate soils in the marshy lands in Kalutara district may lead to transformation of biological available iodine oxidation into volatile iodine by humic substances, at the same time organic matter rich peaty soil may have strong held of iodine and selenium which again induced by low pH and high temperature were suggested as the instrumental factors in the endemic goiter in Kalutara district. Hence, geochemical features such as soil pH, organic matter and thick lateritic cap in the Kalutara goiter endemic area play a role in controlling the available selenium and iodine for food chain through plant uptake and in water.

  • Nickel accumulation in paddy rice on serpentine soils containing high geogenic nickel contents in Taiwan 2017-12-01

    Abstract

    We investigated the extractability of nickel (Ni) in serpentine soils collected from rice paddy fields in eastern Taiwan to evaluate the bioavailability of Ni in the soils as well as for demonstrating the health risks of Ni in rice. Total Ni concentrations in the soils ranged were 70.2–2730 mg/kg (mean, 472 mg/kg), greatly exceeding the natural background content and soil control standard in Taiwan. Available Ni concentration only accounts for <10% of total soil Ni content; 0.1 N HCl-extractable Ni was the more suitable index for Ni bioavailability in the soil to rice than was diethylenetriaminepentaacetic acid (DTPA)-extractable Ni. The accumulation ability of rice roots was much higher than that of its shoots; however, compared with those reported previously, our brown and polished rice samples contained much higher Ni concentrations, within the ranges of 1.50–4.53 and 2.45–5.54 mg/kg, respectively. On the basis of the provisional tolerable Ni intake for adults recommended by the World Health Organization (WHO), daily consumption of this rice can result in an excessive Ni intake.