Large-scale coal mining is being carried out in Tete province, Mozambique. This area is also being planned to become a large coal fired power production hub serving electricity to neighboring ...countries in southern Africa. Thus, huge amounts of coal will be burned, resulting in the generation of a large quantity of coal ash. High concentrations of hazardous elements are often released from coal and coal ash causing negative impacts to human health and the environment. Therefore, it is important to understand the possibility of hazardous elements leaching. Aqueous batch leaching experiments under ambient conditions were conducted using six coal samples and their ash. Most of the coal leached very low concentrations of hazardous elements. However, an absence of carbonate minerals gave rise to higher acidity levels. This resulted in elevated leaching concentrations of manganese and iron, regardless of their contents. Burning coal resulted in higher contents of hazardous elements in the ash. However, leaching concentrations of most of the elements from the ash samples were still lower than the environmental standards. Chromium and manganese were enriched in slightly acidic leachates regardless of their contents while higher arsenic than the permitted level was leached from the ash containing the highest arsenic content that generated neutral pH leachate. These findings highlight a possibility of hazardous elements contamination from Mozambican coal and coal ash. Therefore, the storage of coal and disposal of coal wastes and ash in Tete Province should be done carefully and monitored to avoid the contamination in the region.
•Leaching properties of hazardous elements from coal and coal ash are different.•Coal ash has higher leachability than its parent coal.•Leachate with lower pH promotes the mobility of some hazardous elements.•There is a possibility of hazardous element contamination from coal and coal ash.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
A fluorose dentária é uma doença endêmica, prevalente em cerca de 25 países do mundo. O objetivo deste estudo foi estimar a prevalência e a severidade de fluorose dentária na Cidade de Tete, ...Moçambique, no período de 2013. Foi feito um estudo epidemiológico, observacional descritivo de corte transversal, com uma amostra representativa de 369 residentes da Cidade de Tete, de 2-34 anos de idade, no período de 2013. Os participantes assinaram o termo de consentimento livre e esclarecido. A avaliação de fluorose dentária foi realizada por dois examinadores treinados e calibrados (inter e intraexaminadores Kappa >0,7) usando Índice de Dean. A prevalência de fluorose dentária foi de 88,1%, com maior frequência no sexo feminino, em 49,1%. Os grupos de idades mais afetados foram de 5-11 anos, em 20,6% e de 12-18 anos, em 18,8%. Houve maior ocorrência de casos leves, nas idades de 5-11 anos em 16,6% e de casos moderados na faixa etária de 12-18 anos, em 14,5%. O estudo sugere uma alta prevalência de fluorose dentária, na Cidade de Tete, com predomínio do grau leve, na faixa etária de 5-11 anos, no sexo feminino.
The now classic "Pocket Pasha"--Otolaryngology-Head and Neck Surgery: Clinical Reference Guide--returns for its sixth edition. This universally standard guidebook concisely reviews all aspects of ...otolaryngology including rhinology, laryngology, otology, plastic surgery, sleep medicine, and more. All chapters focus on the key basic science and clinical information to quickly digest the essentials. This "high-yield" book retains a "by residents, for residents" feel while also including expert content useful not only for students and residents but also allied health professionals, primary care providers, and other health providers. The concise, outline format is useful for rapid reading during urgent clinical situations as well as a last-minute refresher before rounds. The guide has proven essential for board review and maintenance of certification exams.
•Potential glacier bed overdeepenings (GBOs) in the Mont Blanc massif are studied.•Predicted locations and morphologies of GBOs are compared to field observations.•Levels of confidence are determined ...and ranked for each predicted GBO.•The timing of potential future lake (PFL) formation in GBOs is roughly estimated.•A baseline for an integrative risk assessment associated to PFL is given.
De-glaciating high mountain areas result in new landscapes of bedrock and debris where permafrost can degrade, persist or even newly form in cases, and of new lakes in glacier bed overdeepenings (GBOs) becoming ice-free. These landscapes with new lakes in close neighborhood to over-steepened and perennially frozen slopes are prone to chain reaction processes (e.g. rock-ice avalanches into lakes triggering impact waves, dam breach or overtopping, and debris flows) with potentially far-reaching run-out distances causing valley floors devastation. The frequency, magnitude and zonation of hazards are shifting, requiring integrative approaches combining comprehensive information about landscape evolution and related processes to support stakeholders in their adaptation strategies. In this study, we intend to setup an essential baseline for such an integrative approach in the Mont Blanc massif (MBM), which is a typical high-mountain range affected by de-glaciation processes. We first (i) predict and (ii) detect potential GBOs by combining the GlabTop model with a visual analysis based on morphological indications of glacier flow through over-deepened bed parts. We then (iii) determine the level of confidence concerning the resulting information, and (iv) estimate the approximate time range under which potential lakes could form. The location of the predicted GBOs and the shape of glacier beds are evaluated against currently forming water bodies at retreating glacier snouts, and seismic and ice penetrating radar measurements on the Argentière glacier. This comparison shows that the location of predicted GBOs is quite robust whereas their morphometric characteristics (depth, volume) are highly uncertain and tend to be underestimated. In total, 48/80 of the predicted or detected GBOs have a high level of confidence. In addition to five recently formed water bodies at glacier snouts, one of the high confidence GBOs (Talèfre glacier) which is also the most voluminous one could form imminently (during coming years), if not partially or totally drained through deeply incised gorges at the rock threshold. Twelve other lakes could form within the first half of the century under a constant or accelerated scenario of continued glacier retreat. Some of them are located below high and permanently frozen rock walls prone to destabilization and high-energy mass movements, hinting at possible hot spots in terms of hazards in the coming decades, where more detailed analysis would be required.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
In Tete Loeper's novel Barefoot in Germany (2020), Black first-person narrator Mutoni from Rwanda recounts her experiences as a marriage migrant, sex worker, maid, and caregiver in Germany, a ...supposed "Happyland" where racism is considered the offense of "others": bad individuals and Nazis. However, Loeper's white savior characters are both nice people and (unwitting) racists, while some of Mutoni's Black sisters behave in discriminatory ways as well. Drawing on critical race theory and imagology, this article shows how the novel deconstructs and appropriates stereotypical images from "'colorblind' Europe" on both a thematic and formal-aesthetic level. By engaging with a comparative and transnational frame of reference that goes beyond a monolingual white canon of theory and literature, the article reveals the novel's connections to other Black texts and genres, as well as its literary strategies in dealing with identity (politics).
Polythermal glaciers can trap considerable volumes of liquid water with the potential to generate devastating outburst floods. This study aims to identify water‐filled subglacial reservoirs from ...ambient seismic noise collected by moderate‐cost surveys. The horizontal‐to‐vertical spectral ratio technique is highly sensitive to impedance contrasts at interfaces, thus commonly used to estimate glacier thickness. Here, we focus on the inverse ratio, that is, the V/H spectral ratio (VHSR), whose high values indicate a low impedance volume beneath the surface, suggesting subglacial cavities. We analyze VHSR peaks from a seismic array of 60 nodes installed on the Tête‐Rousse Glacier (Mont Blanc massif, French Alps); data were gathered over 15 days. Mapping the VHSR amplitude over the free surface reveals the main cavity locations and the basal areas affected by melting within the glacier. Results obtained in the field are supported by a conceptual model based on 3D finite‐element simulations.
Plain Language Summary
Considerable volumes of liquid water may be trapped within cavities in polythermal glaciers. If these cavities rupture, the resulting outburst flood has the potential to cause devastation in populated mountain areas. With the aim of testing methods to locate such cavities, we installed 60 small 3‐component seismic sensors on the Tête‐Rousse Glacier (Mont Blanc massif, French Alps), which is known to contain such cavities. We used these sensors to test a detection method based on ambient seismic noise. For 3 weeks, the sensors recorded vibrations within the glacier. On a glacier without cavities, these vibrations ought to be predominantly in the horizontal direction. In the presence of a cavity, we expect the ice above the cavity to vibrate mostly vertically—like a bridge. In this paper, we highlight areas on the glacier where vertical vibrations were stronger than horizontal vibrations. These areas fit well with the locations of the main known cavities in this glacier, and with areas affected by basal melting. We supported our field observations with modeling based on 3D simulations, paving the way to a new method to locate water‐filled cavities within glaciers.
Key Points
Spectral analysis from ambient seismic noise is complementary to other geophysical methods for investigating glaciers at depth
Results suggest that the vertical‐to‐horizontal spectral ratio is a reliable proxy to locate subglacial cavities
Experimental results were confirmed using a simplified numerical model
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK
The Permian–Triassic transition has been identified for the first time in the Karoo Supergroup of the Moatize–Minjova Basin in Mozambique. This transition was identified in the subsurface in deep ...(ca. 500m) coal exploration boreholes that penetrated the Matinde Formation. Two palynomorph assemblages (assemblage 1 and assemblage 2) assigned to the latest Permian were defined for the Matinde Formation. These assemblages are both dominated by taeniate pollen, cavate trilete spores of Kraeuselisporites spp., associated with conifer (Lueckisporites virkkiae) and pteridosperm pollen (Guttulapollenites hannonicus and Weylandites lucifer). Assemblage 3 represents a microfloral turnover. For the first time specimens of Lunatisporites pellucidus appear in an assemblage dominated by lycopod spore taxa such as Lundbladisporites spp. This assemblage was assigned to the Early Triassic and occurs at the top of borehole DW 132 within the Matinde Formation. The palynostratigraphic signature obtained for the Permian–Triassic transition puts the Moatize–Minjova Basin in the central Gondwana palaeobiogeographic province with strong affinities with the Karoo basins of Madagascar and the Salt Range Basin in Pakistan. These new data indicate that coal deposits accumulated in the Moatize–Minjova Basin until the latest Permian and that these are possibly more extensive temporally than previously described, opening new perspectives for coal and unconventional hydrocarbon exploration in this basin.
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•Permian–Triassic transition was identified in Karoo succession in Mozambique.•Mozambique was part of the central Gondwana palaeobiogeographic province.•Data opens new perspectives for coal and unconventional hydrocarbons exploration.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK, ZRSKP
This study aims to describe a melting process of Christianity faith and local beliefs of the Moluccas’, namely Tete Manis and the crazy bamboo dance. Tete Manis is a local term for God in the ...context of the Moluccas, while Crazy Bamboo is a local dance, which contains mystical aspect within its performance. In combining these two terms, we uses Raimundo Panikkar's thoughts of diatopic hermeneutics because with this model we can understand something else, find an alternative way to overcome some embedded boundaries, and bring together some different horizons, either in a tradition or in a different culture. This research is a library research, using a qualitative analysis of Panikkar's thoughts and also the context of faith and belief of the Moluccas’, namely Tete Manis and the crazy bamboo dance. The findings show that the faith and belief in God, the ancestors and the rulers of bamboo is Faith owned by Moluccas’, and the rituals carried out are the beliefs of the Moluccas’. The relationship between Moluccas’ and ancestors (Tete nene moyang) is not a relationship based on a belief, but rather, it is a relationship based of respect or appreciation. Penelitian ini bertujuan untuk melakukan perjumpaan antara iman dan kepercayan orang Maluku yakni Tete Manis dan tarian bambu gila. Tete Manis merupakan penyebutan Tuhan dalam konteks orang Maluku dan Bambu gila adalah tarian yang memiliki nuansa mistik dalam atraksinya. Dalam menjembatani akan kedua perbedaan ini penulis menggunakan pemikiran Raimundo Panikkar dengan hermeneutik diatopical karena dengan model ini kita dapat memahami sesuatu yang lain, dapat mencari jalan keluar dari batas-batas yang diciptakan, mempertemukan cakrawala yang berbeda secara radikal, baik itu dalam tradisi atau dalam budaya yang berbeda. Jenis penelitian yang digunakan adalah library research atau penelitian kepustakaan dan metode yang digunakan adalah analisis kualitatif terhadap pemikiran Panikkar dan juga Konteks iman dan kepercayaan orang Maluku yaitu Tete Manis dan Tarian bambu gila. Temuan dalam penelitian ini adalah iman dan kepercayaan pada Tuhan, leluhur dan penguasa bambu adalah Faith dimiliki oleh orang Maluku, dan ritual-ritual yang dilakukan merupakan Belief masyarakat Maluku. Hubungan manusia Maluku dan leluhur (Tete-nene moyang) bukanlah relasi kepercayaan, melainkan relasi penghormatan atau penghargaan.