Browsing by Autor "Joseline Tapia"

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Arsenic in Latin America: A critical overview on the geochemistry of arsenic originating from geothermal features and volcanic emissions for solving its environmental consequences
(Elsevier BV, 2019) Nury Morales-Simfors; Jochen Bundschuh; Indika Herath; Claudio Inguaggiato; Alberto Caselli; Joseline Tapia; Fredy Erlingtton Apaza Choquehuayta; M. A. Armienta; Mauricio Ormachea; Erouscilla P. Joseph
Geochemical background, baseline and origin of contaminants from sediments in the mining-impacted Altiplano and Eastern Cordillera of Oruro, Bolivia
(Zoological Society of London, 2012) Joseline Tapia; Stéphane Audry; Brian Townley; Jean‐Louis Duprey
Oruro, located in the Bolivian Altiplano, has been subjected to intense mining and smelting activities since Colonial times (17th Century), yet the current geochemical composition of sediments and trace element behavior is practically unknown. A collection of 91 sediment samples retrieved from five sedimentary cores from Lake Uru Uru (Altiplano) and Cala Cala Lagoon (Eastern Cordillera) subjected to a total digestion technique, with a compilation of a pre-existing database of trace element concentrations in soils and lacustrine sediments obtained from the Oruro Pilot Project (PPO), facilitated the proposal of geochemical backgrounds and a present-time baseline for As, Cd, Cu, Pb, Sb and Zn in sediments from this area. Results obtained by statistics and geographical information system (GIS) analyses showed that the natural geochemical backgrounds of As and Sb are significantly enhanced in comparison to the Upper Continental Crust (UCC) concentrations, world background levels, and those of industrial sites and historical mining sites. The use of a local enrichment factor (EF) normalized by the mean concentration within the Cala Cala lagoon (CCLAC) demonstrated that using UCC concentrations to calculate EFs (EF UCC ) is inadequate for this highly mineralized environment and therefore is not supported. Regarding metals and metalloids, the strong multiplicity of sources in this environment makes it difficult to discriminate between natural and anthropogenic inputs into this endorheic drainage basin, although it is suggested that surficial soils are probably impacted by airborne particulates dispersed from the Vinto (Sb-Sn) smelter, while Lake Uru Uru is influenced by mining activities, particularly drainage waste of the San José and Huanuni mines. As a final contribution, a geochemical background and a present-time baseline for Bolivian highlands sediments are provided, which will be helpful for the improvement of environmental legislation and for the future interpretation of geochemistry data in contamination and/or pollution studies in the altiplanic area.
Origin, Distribution, and Biogeochemistry of Arsenic in the Altiplano-Puna Plateau of South America
(2020) Jésica Murray; Joseline Tapia; Mauricio Ormachea; Noemí Tirado; Kirk Nordstrom
Origin, distribution, and geochemistry of arsenic in the Altiplano-Puna plateau of Argentina, Bolivia, Chile, and Perú
(Elsevier BV, 2019) Joseline Tapia; Jésica Murray; Mauricio Ormachea; Noemí Tirado; D. Kirk Nordstrom
The solid-state partitioning, distribution, and mineralogical associations of arsenic and antimony: Integrated findings from the Altiplano Puna, South America and international comparisons
(Elsevier BV, 2022) Joseline Tapia; Stéphane Audry; Jésica Murray; Prosun Bhattacharya; Mauricio Ormachea; Israel Quino-Lima; D. Kirk Nordstrom
The Unique Altiplano-Puna Plateau: Environmental Perspectives
(Elsevier BV, 2022) Joseline Tapia; Jésica Murray; Mauricio Ormachea; Prosun Bhattacharya
Towards a comprehensive understanding of the “Origin, distribution, and biogeochemistry of arsenic in the Altiplano-Puna plateau of South America” with the IGCP-707 project
(International Union of Geological Sciences, 2023) Jésica Murray; Joseline Tapia; Mauricio Ormachea; Noemí Tirado; D. Kirk Nordstrom
Arsenic (As) is one of the most prevalent geogenic trace elements in the groundwater environment that presents a worldwide health concern.In South America, the "Altiplano-Puna" plateau exhibits high As concentrations in water that could be affecting 3 million inhabitants from Argentina, Bolivia, Chile, and Perú.In this As-rich environment with limited water resources, there exists a lack of knowledge regarding the basic geochemistry of As, water quality characterization, and affected population and biodiversity.Between 2020-2022 we performed interdisciplinary research to understand (i) the origin of As, (ii) its geochemistry and mobility, (iii) its distribution in the environment, and (iv) its effects in the local community and unique biodiversity.Our research provides new scientific insights into the biogeochemical cycle of As in the environment and its effect on human health and biodiversity.Our dissemination activities increased the visibility of the As issue for the region that had historically received little attention from the scientific community and local authorities.This project led to additional funding and the creation of a solid research network between the South and North hemispheres, fostering the participation of young researchers, students, and women.An extension of the project was obtained to continue our work during 2023.