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05 February 2014
A hidden opportunity: Collaborative Development of teaching and learning in Environmental Geochemistry and Health at the Department of Geology, University of Calabar, Nigeria

 

The topic of Environmental Geochemistry has existed as a postgraduate course of study in the Department of Geology, University of Calabar in Nigeria for the past eighteen years. After my Commonwealth Academic Fellowship in 2008-2009, hosted by Prof A.S Hursthouse at the School of Science, University of the West of Scotland, I became a member of SEGH. The skills acquired during this period and as a registered member of SEGH, we decided to review the existing environmental geochemistry curriculum during my tenure as the Head of Department in 2012, since being established in 1976, its first female to hold that post.

 

Through my colleagues in SEGH, I was able to consult widely with members of the International SEGH board to review and gather opinion on the programme topics and syllabus content. This exercise was of great help and a real benefit to get feedback from the environmental geochemistry and health community, giving a real international perspective. It has helped to provide a good justification for changes to the programme in discussion with our University. The course was approved as an area of specialization under Environmental Geoscience section starting from 2013/2014 session. It is among the courses currently being advertised by the graduate school for this session and it will be in cooperated into the new graduate school brochure of the University to help to give it a wider publicity. It is anticipated that in future this will be extended to the undergraduate level when the curriculum will be reviewed as well.

We also hope that with further support from the members of SEGH we will be able to carry out some collaborative research where we lack the necessary laboratory facilities and some graduate students will be able to benefit from the expertise of SEGH members as the need arises.

At this juncture, I would like to thank members of SEGH for their input in structuring of the curriculum.

 

Dr Therese Nganje

University of Calabar

 

 

Pictures:

  1. Dr Therese Nganje with Departmental alumni, 2012
  2. Students of the Department of Geology, University of Calabar, 2012
  3. University of Calabar
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Latest on-line papers from the SEGH journal: Environmental Geochemistry and Health

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    Abstract

    A 30-day incubation experiment was conducted using a heavy metal-contaminated mined soil amended with date palm feedstock (FS) and its derivative biochars (BCs) at three pyrolysis temperatures of 300 (BC-300), 500 (BC-500), and 700 °C (BC-700) with different application rates (0.0, 5, 15, and 30 g kg−1) to investigate their short-term effects on soil respiration (CO2–C efflux), microbial biomass carbon (MBC), soil organic carbon (SOC), mobile fraction of heavy metals (Cd, Cu, Pb, Zn, Mn, and Fe), pH, and electrical conductivity (EC). The results showed that FS and BC-300 with increasing addition rate significantly reduced soil pH, whereas SOC, CO2–C efflux, and soil MBC were increased compared to the control. On the contrary, BC-500 and BC-700 increased soil pH at early stage of incubation and have small or no effects on SOC, CO2–C efflux, and MBC. Based on the results, the date palm biochars exhibited much lower cumulative CO2–C efflux than feedstock, even with low-temperature biochar, indicating that BCs have C sequestration potential. Applying BC-700 at 15 and 30 g kg−1 significantly reduced cumulative CO2–C efflux by 21.8 and 45.4% compared to the control, respectively. The incorporation of FS into contaminated soil significantly increased the mobile content of Cd and Mn, but decreased the mobile content of Cu. However, BC-300 significantly reduced the mobile content of Cd, Cu, Pb, and Zn. It could be concluded that low-temperature biochar could be used as a soil amendment for reducing heavy metal mobility in mining contaminated soil in addition to minimize soil CO2–C efflux.

  • Historical record of anthropogenic polycyclic aromatic hydrocarbons in a lake sediment from the southern Tibetan Plateau 2017-04-17

    Abstract

    High-altitude lake sediments can be used as natural archives to reconstruct the history of pollutants. In this work, the temporal distribution of polycyclic aromatic hydrocarbons (PAHs) was determined in a sediment core collected from the southern Tibetan Plateau (TP), which was dated by using the 210Pb dating method and validated with the 137Cs fallout peak. The concentrations of the anthropogenic PAHs (Σ8PAH) in the sediment core ranged from 0.83 to 12 ng/g dw, and the fluxes of the Σ8PAH were in the range of 2.1–27 g/cm2/year. The temporal variations in the concentration and input flux of anthropogenic PAHs were low with little variability before the 1950s, and then gradually increased from the 1950s to the 1980s, and an accelerated increase was observed after the early 1980s. The content of total organic carbon played an insignificant role in affecting the time trends of PAHs in the sediment core. Diagnostic concentration fractions of PAH components indicate PAHs in the lake sediment of the southern TP which are mainly from biomass burning and/or from long-range atmospheric transport.

  • Determination of the potential implementation impact of 2016 ministry of environmental protection generic assessment criteria for potentially contaminated sites in China 2017-04-12

    Abstract

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