SEGH Articles

SEGH2019 Sponsored Attendees: Adewole Michael Gbadebo

02 September 2019
Adewole Michael Gbadebo a Professor of Environmental Geochemistry at the Department of Environmental Management and Toxicology, Federal University of Agriculture, Abeokuta, Nigeria shares his experience of SEGH2019

I arrived at Manchester Metropolitan University (MMU), venue of the 35th SEGH conference at around 4 pm on Monday 1st July 2019  where  I was welcomed by Prof. Sanja Potgieter-Vermaak. On the morning of  Tuesday 2nd July 2019, I came to the venue of the conference from my hotel registered for the conference, mounted my poster on the assigned billboard, attended the welcome and introduction section and attended the day’s sessions (comprising of morning and afternoon sessions). Each session started with keynote speakers’ presentation followed by 15 minutes of Platform /Oral presentations and 2-minute flash presentations with an interlude of lunch break before the afternoon section. I was at my poster stand during the break periods to present my work to poster viewing conference-participating-audience. This I did routinely from Tuesday 2nd – Thursday 4th July 2019.

I also attended behind the scenes evening social at the Manchester City Football Stadium on the evening of Tuesday 2nd. I remember hearing Prof Sanja Potgieter-Vermaak mention that participants at the conference were from 15 countries of the world including Nigeria. At the end of the conference, during the closing ceremony/remarks, hosts of the 36th and 37th SEGH in Kenya and China were announced and acceptance speeches were given by Prof Odipo Osano from Kenya and China representatives. Prizes were given to the best poster presenter and people who worked with Prof Sanja Potgieter-Vermaak to make the conference a huge success. This was capped with SEGH AGM which took place on Thursday at the same venue of the conference with the delegates (conference participants) in attendance and Dr Michael Watts from BGS was re-elected as the chair of SEGH.

With regards to networking opportunities, the conference afforded me opportunities for meeting professional colleagues from diverse institutions and fields of specialization and interests. I was able to discuss with these scientists, possibilities of research collaborations. Some of these people include but not limited to: Michael Watts (BGS); David Manning (on carbon-capturing); Ricardo Godoi (on Pollen & Hospitality); Paul Preton (on Brownfield Sciences); Khadija and Jane (on Household Dust); Alex Stewart (on Iodine Diseases in Nigeria, Nee Africa).

I am grateful for the SEGH bursary I received as an international participant from a developing country.

Presenting my poster at SEGH2019

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

  • Geophagy among East African Chimpanzees: consumed soils provide protection from plant secondary compounds and bioavailable iron 2019-12-01

    Abstract

    Geophagy, the intentional consumption of earth materials, has been recorded in humans and other animals. It has been hypothesized that geophagy is an adaptive behavior, and that clay minerals commonly found in eaten soil can provide protection from toxins and/or supplement micronutrients. To test these hypotheses, we monitored chimpanzee geophagy using camera traps in four permanent sites at the Budongo Forest Reserve, Uganda, from October 2015–October 2016. We also collected plants, and soil chimpanzees were observed eating. We analyzed 10 plant and 45 soil samples to characterize geophagic behavior and geophagic soil and determine (1) whether micronutrients are available from the soil under physiological conditions and if iron is bioavailable, (2) the concentration of phenolic compounds in plants, and (3) if consumed soils are able to adsorb these phenolics. Chimpanzees ate soil and drank clay-infused water containing 1:1 and 2:1 clay minerals and > 30% sand. Under physiological conditions, the soils released calcium, iron, and magnesium. In vitro Caco-2 experiments found that five times more iron was bioavailable from three of four soil samples found at the base of trees. Plant samples contained approximately 60 μg/mg gallic acid equivalent. Soil from one site contained 10 times more 2:1 clay minerals, which were better at removing phenolics present in their diet. We suggest that geophagy may provide bioavailable iron and protection from phenolics, which have increased in plants over the last 20 years. In summary, geophagy within the Sonso community is multifunctional and may be an important self-medicative behavior.

  • Accumulation of uranium and heavy metals in the soil–plant system in Xiazhuang uranium ore field, Guangdong Province, China 2019-12-01

    Abstract

    Plants that have grown for many years in the special environmental conditions prevailing in mining areas are naturally screened and show strong capacity to adapt to their environment. The present study investigated the enrichment characteristics of U and other heavy metals (As, Cu, Pb, Mn, Mo, Zn, Cd, Co, and Ni) in the soil–plant system in Xiazhuang uranium mine. Four dominant plants (Castanopsis carlesii, Rhus chinensis, Liriodendron chinense, and Sapium discolor) and soil samples were collected from the mined areas, unmined areas, and background areas away from the ore field. U, As, Cu, Pb, Mn, Mo, Zn, Cd, Co, and Ni concentrations were analyzed by ICP-MS. The results demonstrate that (1) The highest concentrations of U (4.1–206.9 mg/kg) and Pb (43.3–126.0 mg/kg) with the geoaccumulation index (Igeo) greater than 1 show that they are the main soil pollutants in the research area. (2) The biological accumulation coefficient (LBAC) values for Cd, Mn, and Cu are greater than zero in S. discolor, L. chinense, and C. carlesii and these three plants indicate that they can be used for remediation of the soil in the ore field. (3) R. chinensis inhibits the accumulation of heavy metals and shows sensitive pigment responses to the accumulation of U in the leaves. L. chinense has the strongest enrichment effect on heavy metals but exhibits weak biochemical responses under U stress. C. carlesii demonstrates strong adaptation to U and can maintain healthy pigment characteristics in case of high U enrichment. (4) S. discolor, L. chinense, C. carlesii and R. chinensis have strong tolerance to U toxicity and different biochemical responses.

  • Distribution, sources and health risk assessment of contaminations in water of urban park: A case study in Northeast China 2019-12-01

    Abstract

    This case study was performed to determine whether the pollutants in water of urban park could bring health risk to human engaging in water-related activities such as swimming and provide evidence demonstrating the critical need for strengthened recreational water resources management of urban park. TN, NH4+-N, TP, Cu, Mn, Zn, Se, Pb, As, Cd and Cr(VI) contents were determined to describe the spatial distribution of contaminations; sources apportionment with the method of correlation analysis, factor analysis and cluster analysis were followed by health risk assessment for swimmers of different age groups. The results reveal that element contents in all sites do not exceed Chinese standard for swimming area and European Commission standard for surface water; all detected elements except Cr(VI) have a tendency to accumulate in the location of lake crossing bridge; Mn and Zn are considered to have the same pollution source including geogenic and anthropogenic sources by multivariable analysis. Carcinogenic risks of different age groups descend in the same order with non-carcinogenic risks. Among all elements, Zn and Mn contribute the lowest non-carcinogenic risk (5.1940E-06) and the highest non-carcinogenic risk (7.9921E-04) through skin contact pathway, respectively. The total average personal risk for swimmers in swimming area is 1.9693E-03, and this site is not suitable for swimming. Overall, it is possible that swimmers are exposed to risk via the dermal route when carrying out water-related activities, it is recommended that necessary precautions and management should be taken in other similar locations around the world.