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
The Partial Molal Volumes and Compressibilities of Nonelectrolytes and Amino Acids in 0.725 m NaCl
Aquatic Geochemistry - Tập 22 - Trang 1-16 - 2015
Frank J. Millero, Fen Huang
The partial molal volumes and compressibilities of a number of nonelectrolytes and amino acids in 0.725 m NaCl have been determined from density and compressibility measurements. The results have been used to examine the behavior of these compounds in ocean waters. The partial molal volumes of the solutes in 0.725 m NaCl were a linear function of the values in water. The partial molal compressibi...... hiện toàn bộ
Fe(III) Reduction in the Presence of Catechol in Seawater
Aquatic Geochemistry - Tập 16 - Trang 467-482 - 2010
J. Magdalena Santana-Casiano, M. González-Dávila, A. G. González, F. J. Millero
Fe(II)-Fe(III) redox behavior has been studied in the presence of catechol under different pH, ionic media, and organic compound concentrations. Catechol undergoes oxidation in oxic conditions producing semiquinone and quinone and reduces Fe(III) in natural solutions including seawater (SW). It is a pH-dependent process. Under darkness, the amount of Fe(II) generated is smaller and is related to l...... hiện toàn bộ
Hydrogeochemical Processes Controlling the Water Chemistry of a Closed Saline Lake Located in Sahara Desert: Lake Qarun, Egypt
Aquatic Geochemistry - Tập 21 - Trang 31-57 - 2015
Mahmoud S. M. Abdel Wahed, Essam A. Mohamed, Mohamed I. El-Sayed, Adel M’nif, Mika Sillanpää
We present here the first detailed hydrogeochemical study about Lake Qarun. It is a closed, saline, and alkaline lake located in the North African Sahara Desert. It has no outflow except by evaporation. This lake is the deepest area in the Fayoum Depression with elevation 43 m below sea level. In this area, Nile River is the main source of water and Lake Qarun acts as the main reservoir of all dra...... hiện toàn bộ
Correction to: The Effect of Bacterial Sulfate Reduction Inhibition on the Production and Stable Isotopic Composition of Methane in Hypersaline Environments
Aquatic Geochemistry - Tập 26 - Trang 311-325 - 2020
Cheryl A. Kelley, Brad M. Bebout, Jeffrey P. Chanton, Angela M. Detweiler, Adrienne Frisbee, Brooke E. Nicholson, Jennifer Poole, Amanda Tazaz, Claire Winkler
For reason beyond the control of the authors or the editors, the article.
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
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