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article

In vitro assessment of activated charcoal‐based dental products

Andrey Gonçalves Emídio, Vitória Fraga Fogaça Melo e Silva, Edgar Pedreiro Ribeiro, Gabriela Torres Zanin, more

Journal of Esthetic and Restorative Dentistry > 35 > 2 > 423 - 430

Objective Assess the effects of activated charcoal‐based products on whitening and changes on dental enamel surface. Material and Methods Fifty‐two blocks of bovine dental enamel were randomly distributed in four groups (n = 13): brushing with activated charcoal‐based powder (PW); brushing with activated charcoal‐based dentifrice (AC); brushing with a conventional dentifrice containing 1450 ppm...

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Reconstructing late Holocene vegetation and fire histories in monsoonal region of southeastern China

Kangyou Huang, Zhuo Zheng, Wenbo Liao, Linglong Cao, more

Palaeogeography, Palaeoclimatology, Palaeoecology > 2014 > 393 > Complete > 102-110

Eastern subtropical China is a key region for understanding the variability of the East Asian Summer Monsoon (EASM). Multidisciplinary studies in southeastern China have shown that the summer monsoon intensity declined in the mid-late Holocene. We present a high-resolution pollen record of the last 4000calyr BP in Jinggang Mts of Jiangxi Province, southeastern China. The identified pollen taxa from...

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Holocene vegetation history and fire regimes of Pseudotsuga menziesii forests in the Gulf Islands National Park Reserve, southwestern British Columbia, Canada

Jennifer D. Lucas, Terri Lacourse, J.D. Lucas, T. Lacourse

Quaternary Research > 2013 > 79 > 3 > 366-376

Pollen analysis of a 9.03-m-long lake sediment core from Pender Island on the south coast of British Columbia was used to reconstruct the island's vegetation history over the last 10,000years. The early Holocene was characterized by open mixed woodlands with abundant Pseudotsuga menziesii and a diverse understory including Salix and Rosaceae shrubs and Pteridium aquilinum ferns. The establishment...

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Palaeobotanical evidence of wildfires in the Late Palaeozoic of South America – Early Permian, Rio Bonito Formation, Paraná Basin, Rio Grande do Sul, Brazil

André Jasper, Dieter Uhl, Margot Guerra-Sommer, Volker Mosbrugger

Journal of South American Earth Sciences > 2008 > 26 > 4 > 435-444

Fossil charcoal, as direct evidence of palaeowildfires, has repeatedly been reported from several plant-bearing deposits from the Late Palaeozoic of the Northern Hemisphere. In contrast charcoal reports from the Late Palaeozoic deposits of the Southern Hemisphere are relatively rare in comparison to the Northern Hemisphere. Although the presence of pyrogenic coal macerals has repeatedly been reported...

article

Dye Removal From Tannery Wastewater Utilizing Footwear Waste: A Sustainable Approach

Saidur Rahman Shakil, Adhir Chandra Paul, Md. Abdulla‐Al‐Mamun, Sainik Roy Thirtho, more

Environmental Quality Management > 34 > 1 > n/a - n/a

Waste‐to‐3R (reduce, reuse, and recycle) is a promising mass balance approach in the leather sector for addressing the current challenge of overproduction of rubber sole waste in the footwear industry and dye pollution in tanneries. In this study, low‐cost charcoal derived from discarded natural rubber (NR) soles was effectively employed to remove anionic and cationic dyes from a model tannery dye...

article

Inbuilt age, residence time, and inherited age from radiocarbon dates of modern fires and late Holocene deposits, Western Transverse Ranges, California

Katherine Scharer, Devin McPhillips, Jenifer Leidelmeijer, Matthew Kirby

Earth Surface Processes and Landforms > 49 > 8 > 2552 - 2566

Radiocarbon dates from alluvial sections provide maximum deposit ages because of the time lag between formation of the dated material and deposition at the sample site, potentially producing decade‐ to century‐long biases in the dates of historic events, paleoclimatic change, fire histories, and paleoearthquakes. This bias, called the inherited age, combines the inbuilt age distribution, which reflects...

article

Exploring the past through lynchet landscapes in the Vosges Mountains and the Lorraine Plateau (France)

Benjamin Keller, Robin Vincent, Dominique Schwartz, Damien Ertlen

Geoarchaeology > 39 > 3 > 300 - 319

Lynchets are ridges formed by erosion and sediment accumulation downstream of agricultural plots and offer valuable insights into past agricultural activity. These microtopographies cover vast areas and serve as indicators of historical changes in land use. As a result, their ubiquity across Europe makes them particularly interesting. In this study, we propose a geoarchaeological approach to analyze...

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Paleofires and vegetation in a Late Pleistocene paleolake (>43 ka bp) of the savannas of central Brazil

Gabriela Luiza Pereira Pires Follador, Raquel Franco Cassino, Angélica F. Drummond C. Varajão, Jonathas S. Bittencourt

Journal of Quaternary Science > 38 > 8 > 1305 - 1312

This study investigates paleoenvironmental changes at the Paleolagoa Seca site, an Upper Quaternary locality of lacustrine origin in central Brazil. We present charcoal and pollen analyses of this sedimentary sequence, and assess how they compare with previously published fossil macroflora and paleoclimatic reconstructions of the same site and adjacent localities. We identified a mosaic of savannas,...

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Paleoecological data complete historical and archaeological archives: Human–environment nexus at the fluvio maritime city port of Chilia (Licostomo; Northern Danube delta) since the 14th century

Luminița Preoteasa, Diana Hanganu, Anca Dan, Gabriela Florescu, more

Geoarchaeology > 38 > 6 > 786 - 803

This study reconstructs the paleoecological settings of Chilia/Licostomo, the most important Genoese colony in the Danube delta. Our paleoenvironmental data (i.e., sedimentology, pollen, charcoal, radiocarbon ages) corroborate historical and archaeological information over the last seven centuries to document the habitation at Chilia and its military and socioeconomic activity during ca. 14th–19th...

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Climatic and vegetational controls of Holocene wildfire regimes in the boreal forest of northern Fennoscandia

Cécile C. Remy, Gwenaël Magne, Normunds Stivrins, Tuomas Aakala, more

Journal of Ecology > 111 > 4 > 845 - 860

Climate change is expected to increase wildfire activity in boreal ecosystems, thus threatening the carbon stocks of these forests, which are currently the largest terrestrial carbon sink in the world. Describing the ecological processes involved in fire regimes in terms of frequency, size, type (surface vs. crown) and severity (biomass burned) would allow better anticipation of the impact of climate...

article

Characteristics of Char from Low-Rank Coal Gasification

Marwan Asof, Susila Arita, Winny Andalia

Journal of Ecological Engineering > 2023 > Vol. 24, nr 4 > 78--84

The coal gasification process in this study aimed to increase the quality of low-rank coal (LRC) from lignite type to coal with semi-anthracite and anthracite grades with higher fixed carbon values. The gasification process was carried out at temperatures between 700-900 °C. In the initial stages of the study, the relationship between the increase in gasification temperature with the mass of coal...

article

Late Pleistocene montane forest fire return interval estimates from Mount Kenya

Colin J. Courtney Mustaphi, Stephen M. Rucina, Rob Marchant

Journal of Quaternary Science > 38 > 2 > 146 - 159

Past forest fire events and fire frequencies are reconstructed with sediment–charcoal records at lake catchment spatial scales. Few quantitative palaeofire analyses exist in tropical montane forests, where fire return intervals are long (decadal and centennial scales) because of the infrequency of fire weather and fuel conditions. Fire return intervals are a key characteristic of fire regimes and...

article

Potential critical sources of error in the analysis of microcharcoal in Greenlandic palynological samples – an initial study

S. Krüger, B. Schnetger, A. Strunk, C. Jessen

Journal of Quaternary Science > 38 > 2 > 139 - 145

It is common practice to count charcoal particles alongside pollen and non‐pollen palynomorphs in palynological samples. The classification of material as charcoal is dependent upon a number of morphological criteria which, in certain geological zones, could be misclassified. In a preliminary study we tested the effects of different preparation techniques on the count result of charcoal from the same...

article

Long‐term fire and vegetation change in northwestern Amazonia

Britte M. Heijink, Quinten A. Mattijs, Renato Valencia, Annemarie L. Philip, more

Biotropica > 55 > 1 > 197 - 209

Amazonian forest plots are used to quantify biodiversity and carbon sequestration, and provide the foundation for much of what is known about tropical ecology. Many plots are assumed to be undisturbed, but recent work suggests that past fire, forest openings, and cultivation created vegetation changes that have persisted for decades to centuries (ecological legacies). The Yasuní Forest Dynamics plot...

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Holocene climate–fire–vegetation feedbacks in tropical savannas: Insights from the Marura sinkhole, East Arnhem Land, northern Australia

Cassandra Rowe, Emma Rehn, Michael Brand, Lindsay B. Hutley, more

Journal of Vegetation Science > 33 > 6 > n/a - n/a

Aims Informed management of savanna systems depends on understanding determinates of composition, structure and function, particularly in relation to woody‐plant components. This understanding needs to be regionally based, both past and present. In this study, Holocene plant patterns are explored at a site within the eucalypt savannas of northern Australia. Australian savannas are the least developed...

article

Characterization of fine particulate matter from indoor cooking with solid biomass fuels

Axel Eriksson, Asmamaw Abera, Ebba Malmqvist, Christina Isaxon

Indoor Air > 32 > 11 > n/a - n/a

Household burning of solid biomass fuels emits pollution particles that are a huge health risk factor, especially in low‐income countries (LICs) such as those in Sub‐Saharan Africa. In epidemiological studies, indoor exposure is often more challenging to assess than outdoor exposure. Laboratory studies of solid biomass fuels, performed under real‐life conditions, are an important path toward improved...

article

Repeated Wildfires in the Middle Jurassic Xishanyao Formation (Aalenian and Bajocian Ages) in Northwestern China

Haihai HOU, Longyi SHAO, Guodong LIANG, Yue TANG, more

Acta Geologica Sinica ‐ English Edition > 96 > 5 > 1752 - 1763

The coal‐bearing strata in the southern Junggar Basin in northwestern China have recently attracted the attention of coal geologists. Its abundance of coal resources is of great interest as there is a potential of unlocking details about the palaeoclimatic information. Coal deposits have the capacity to record wildfire events, even those with inefficient combustions. To characterize wildfire events...

article

Anthropogenic dark earth: Evolution, distribution, physical, and chemical properties

Michael O. Asare

European Journal of Soil Science > 73 > 5 > n/a - n/a

Anthropogenic dark earth (ADE) is a category of Anthrosols (anthropogenic soils) characterised by dark colour from homogeneous charcoal inclusion and extraordinary fertility compared with non‐anthropogenic soils. The study aims to provide a detailed overview of the origin and distributions of ADEs, together with their physical and chemical characteristics, to reveal their fertility status for arable...

article

Millennial land use explains modern high‐elevation vegetation in the submediterranean mountains of Southern Europe

César Morales‐Molino, Maria Leunda, Mario Morellón, Jon Gardoki, more

Journal of Biogeography > 49 > 10 > 1779 - 1792

Aim Pinewood decline and scrubland expansion are major features of Late Holocene vegetation history in the Cantabrian Range. However, the drivers of this remarkable vegetation shift remain to be investigated. Here, we aim at disentangling the role of past land use and climate in shaping the high‐elevation Cantabrian landscape during the past two millennia. Location Cantabrian Range (northern Iberia)...

article

Rapid elimination of copper (II), nickel (II) and chromium (VI) ions from aqueous solutions by charcoal modified with phosphoric acid used as a green biosorbent

Fouad El Mansouri, Hammadi El Farissi, Francesco Cacciola, Abdelmonaem Talhaoui, more

Polymers for Advanced Technologies > 33 > 7 > 2254 - 2264

Activated carbon modified by phosphoric acid noted CAa was successfully used as a new low‐cost adsorbent for removing Cu²⁺, Ni²⁺ and Cr⁶⁺ metal ions from artificially contaminated aqueous solutions. Experiments were performed in batches for adsorption kinetics and isotherms. Scanning electron microscope (SEM) observations as well as a nitrogen adsorption–desorption BET surface area measurement showed...

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Search results

In vitro assessment of activated charcoal‐based dental products

Reconstructing late Holocene vegetation and fire histories in monsoonal region of southeastern China

Holocene vegetation history and fire regimes of Pseudotsuga menziesii forests in the Gulf Islands National Park Reserve, southwestern British Columbia, Canada

Palaeobotanical evidence of wildfires in the Late Palaeozoic of South America – Early Permian, Rio Bonito Formation, Paraná Basin, Rio Grande do Sul, Brazil

Dye Removal From Tannery Wastewater Utilizing Footwear Waste: A Sustainable Approach

Inbuilt age, residence time, and inherited age from radiocarbon dates of modern fires and late Holocene deposits, Western Transverse Ranges, California

Exploring the past through lynchet landscapes in the Vosges Mountains and the Lorraine Plateau (France)

Paleofires and vegetation in a Late Pleistocene paleolake (>43 ka bp) of the savannas of central Brazil

Paleoecological data complete historical and archaeological archives: Human–environment nexus at the fluvio maritime city port of Chilia (Licostomo; Northern Danube delta) since the 14th century

Climatic and vegetational controls of Holocene wildfire regimes in the boreal forest of northern Fennoscandia

Characteristics of Char from Low-Rank Coal Gasification

Late Pleistocene montane forest fire return interval estimates from Mount Kenya

Potential critical sources of error in the analysis of microcharcoal in Greenlandic palynological samples – an initial study

Long‐term fire and vegetation change in northwestern Amazonia

Holocene climate–fire–vegetation feedbacks in tropical savannas: Insights from the Marura sinkhole, East Arnhem Land, northern Australia

Characterization of fine particulate matter from indoor cooking with solid biomass fuels

Repeated Wildfires in the Middle Jurassic Xishanyao Formation (Aalenian and Bajocian Ages) in Northwestern China

Anthropogenic dark earth: Evolution, distribution, physical, and chemical properties

Millennial land use explains modern high‐elevation vegetation in the submediterranean mountains of Southern Europe

Rapid elimination of copper (II), nickel (II) and chromium (VI) ions from aqueous solutions by charcoal modified with phosphoric acid used as a green biosorbent

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