Aquatic Geochemistry

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Carbon dioxide dynamics in rivers and coastal waters of the “big island” of Hawaii, USA, during baseline and heavy rain conditions
Aquatic Geochemistry - Tập 13 - Trang 1-18 - 2006
François S. Paquay, Fred T. Mackenzie, Alberto V. Borges
The distributions of the partial pressure of carbon dioxide (pCO2) and total alkalinity (TA) were examined for a 6-month period in the Wailuku and Wailoa rivers and coastal waters of Hilo Bay on the west coast of the Island of Hawaii, USA. Main results for the largest and turbulent Wailuku River show in the watershed an oversaturation in CO2 with respect to atmospheric equilibrium and a CO2 unders...... hiện toàn bộ
Chemical Analysis of Gaet’ale, a Hypersaline Pond in Danakil Depression (Ethiopia): New Record for the Most Saline Water Body on Earth
Aquatic Geochemistry - Tập 23 - Trang 109-117 - 2017
Eduardo Pérez, Yonas Chebude
The chemical analysis of the water of Gaet’ale Pond, a small water body located in Danakil Depression, Ethiopia, resulted to be the most saline water body on earth with total dissolved solids (TDS) of 433 g kg−1. The composition of the water indicates the predominance of two main salts: CaCl2 and MgCl2 at a proportion of Ca:Mg = 3.1 (w/w). Traces of K+, Na+ and NO3 − are al...... hiện toàn bộ
Adsorption of Copper, Nickel, and Cadmium on Goethite in the Presence of Organic Ligands
Aquatic Geochemistry - Tập 9 - Trang 65-85 - 2003
Diane Buerge-Weirich, Philippe Behra, Laura Sigg
Adsorption of copper, cadmium and nickel at low concentrations on goethite was studied in the presence of the simple organic ligands oxalate, salicylate, and pyromellitate. The experimental metal adsorption behavior was compared to calculations with a surface complexation model to evaluate the most important interactions. Oxalate mostly decreased Cu and Ni adsorption at high pH-values by competiti...... hiện toàn bộ
Nguồn gốc và Biến đổi MgCl2–NaCl trong Một Hồ Nước Tự Nhiên: Những Hiểu Biết Từ Dữ Liệu Hóa Học và Isotopic Dịch bởi AI
Aquatic Geochemistry - Tập 24 - Trang 137-162 - 2018
Tiziano Boschetti, Salih Muhammad Awadh, Emma Salvioli-Mariani
Việc khảo sát dữ liệu hóa học - đồng vị trước đây và mới (tỷ lệ 2H/1H–18O/16O, 11B/10B và 87Sr/86Sr) cho thấy nguồn gốc mưa của Hồ Sawa (Tỉnh Muthanna, Iraq) và sự kết nối của nó với các tầng nước ngầm địa phương, cung cấp nước cho hồ qua nước ngầm nổi lên từ đáy của nó thông qua các hệ thống đứt gãy. Các mô hình hóa học và đồng vị bay hơi được theo dõi bằng mã máy tính địa hóa bằng cách sử dụng t...... hiện toàn bộ
#hồ Sawa #nước ngầm #hóa học đồng vị #bay hơi #khoáng chất thạch cao #biến đổi khí hậu
Arsenic in Porewaters of the Unsaturated Zone of an Argentinean Watershed: Adsorption and Competition with Carbonate as Important Processes that Regulate its Concentration
Aquatic Geochemistry - - 2015
Virginia Puccia, Fabiana Limbozzi, Marcelo Javier Avena
Desert Potholes: Ephemeral Aquatic Microsystems
Aquatic Geochemistry - - 2005
Marjorie A. Chan, Katrina Moser, Jim M. Davis, Gordon Southam, Kebbi Hughes, Tim Graham
An enigma of the Colorado Plateau high desert is the “pothole”, which ranges from shallow ephemeral puddles to deeply carved pools. The existence of prokaryotic to eukaryotic organisms within these pools is largely controlled by the presence of collected rainwater. Multivariate statistical analysis of physical and chemical limnologic data variables measured from potholes indicates spatial and temp...... hiện toàn bộ
Dolomite Versus Calcite Weathering in Hydrogeochemically Diverse Watersheds Established on Bedded Carbonates (Sava and Soča Rivers, Slovenia)
Aquatic Geochemistry - Tập 17 - Trang 357-396 - 2011
Kathryn Szramek, Lynn M. Walter, Tjaša Kanduč, Nives Ogrinc
The relative contributions of dolomite to calcite weathering related to riverine fluxes are investigated on a highly resolved spatial scale in the diverse watersheds of Slovenia, which previous work has shown have some of the highest carbonate-weathering intensities in the world and suggests that dolomite weathering is favored over limestone weathering in mixed carbonate watersheds. The forested S...... hiện toàn bộ
Characterization and Assessment of Groundwater Resources in a Complex Hydrological Basin of Central Greece (Kopaida basin) with the Joint Use of Hydrogeochemical Analysis, Multivariate Statistics and Stable Isotopes
Aquatic Geochemistry - - 2017
Evangelos Tziritis, P. S. Datta, Rahim Barzegar
Dissolved Trace Metal–Organic Complexes in the Lot–Garonne River System Determined Using the C18 Sep-Pak System
Aquatic Geochemistry - Tập 12 - Trang 21-38 - 2006
E. Lemaire, G. Blanc, J. Schäfer, A. Coynel, H. Etcheber
An 11-month observation of dissolved and particulate organic matter, chlorophyll a(Chl a), C18 Sep-Pak extractable hydrophobic dissolved organic matter (hDOM) fraction and associated dissolved trace metals (Cd, Cu, V, Co, Ni, Mo, U) was performed in the Lot–Garonne River system. This system includes the Riou Mort, the Lot River and the downstream reaches of the Garonne River and represents the flu...... hiện toàn bộ
Influence of Diverse Urban Pressures on Water Characteristics in a Small Eastern Mediterranean Watershed
Aquatic Geochemistry - Tập 28 - Trang 111-133 - 2022
E. Maatouk, A. El Samrani, R. Sawan, R. Bou Ghosn Salameh, V. Kazpard, Z. Matar
This work focuses on the characterization of a typical coastal karst watershed by addressing its physico-chemical parameters. The concentrations of the main ions clearly indicate the dominance of Ca2+ and HCO3− with a carbonate weathering rate equivalent to 230t/Km2/year; that is a typical weathering of karst watersheds. The spatio-temporal variability of dissolved organic matter (DOM) is also ass...... hiện toàn bộ
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