A note on the chemical composition of lake water in the Laguna Amarga, a saline lake in Patagonia, Chile

1995 ◽  
Vol 4 (2) ◽  
pp. 165-167 ◽  
Author(s):  
Y. Saijo ◽  
O. Mitamura ◽  
M. Tanaka
Keyword(s):  
Chemical Composition ◽  
Lake Water ◽  
Saline Lake

Detection of Upward Percolation of Saline Lake Water

1970 ◽  
Vol 96 (9) ◽  
pp. 1795-1802
Author(s):  
C. J. Braudo ◽  
F. Mero ◽  
A. Mercado
Keyword(s):  
Lake Water ◽  
Saline Lake

Outdoor cultivation of Dunaliella salina KU 11 using brine and saline lake water with raceway ponds in northeastern Thailand

2017 ◽  
Vol 64 (6) ◽  
pp. 938-943 ◽  
Author(s):  
Zhe Wu ◽  
Wipawee Dejtisakdi ◽  
Prasart Kermanee ◽  
Chunhong Ma ◽  
Wallop Arirob ◽  
...  
Keyword(s):  
Lake Water ◽  
Dunaliella Salina ◽  
Saline Lake ◽  
Outdoor Cultivation ◽  
Northeastern Thailand ◽  
Raceway Ponds

scholarly journals Lake water and talik groundwater interaction in continuous permafrost, Central Yakutia

2019 ◽  
Vol 98 ◽  
pp. 07024
Author(s):  
Nadezhda Pavlova ◽  
Liudmila Lebedeva ◽  
Vladimir Efremov
Keyword(s):  
Chemical Composition ◽  
Air Temperature ◽  
Lake Water ◽  
Structural Features ◽  
Downward Trend ◽  
Hydrological Data ◽  
Hydrochemical Data ◽  
Continuous Permafrost ◽  
Solids Content ◽  
Winter Air Temperature

Structural features of a lake talik associated with eolian relief are discussed. Analysis of hydrochemical and hydrological data for 2010-2017 showed that talik groundwater feeds lake and maintains perennial outflow from the lake. Variations in the chemical composition of the lake and outflowing creek are characterized on an annual and interannual basis. Seasonal comparison of hydrochemical data indicates a downward trend in dissolved-solids content of the lake water over the last six years, suggesting an increasing contribution of suprapermafrost groundwater to the lake and lake talik. Probable reason of enhanced suprapermafrost flow is increase of its duration due to observed rise of winter air temperature.

scholarly journals Effect of Humic Substance Photodegradation on Bacterial Growth and Respiration in Lake Water

2005 ◽  
Vol 71 (10) ◽  
pp. 6267-6275 ◽  
Author(s):  
Alexandre M. Anesio ◽  
Wilhelm Granéli ◽  
George R. Aiken ◽  
David J. Kieber ◽  
Kenneth Mopper
Keyword(s):  
Chemical Composition ◽  
Humic Substance ◽  
Bacterial Growth ◽  
Lake Water ◽  
Standard Error ◽  
Growth Efficiency ◽  
Bacterial Respiration ◽  
Growth Respiration ◽  
Biological Substrates ◽  
Highly Correlated

ABSTRACT This study addresses how humic substance (HS) chemical composition and photoreactivity affect bacterial growth, respiration, and growth efficiency (BGE) in lake water. Aqueous solutions of HSs from diverse aquatic environments representing different dissolved organic matter sources (autochthonous and allochthonous) were exposed to artificial solar UV radiation. These solutions were added to lake water passed through a 0.7-μm-pore-size filter (containing grazer-free lake bacteria) followed by dark incubation for 5, 43, and 65 h. For the 5-h incubation, several irradiated HSs inhibited bacterial carbon production (BCP) and this inhibition was highly correlated with H2O2 photoproduction. The H2O2 decayed in the dark, and after 43 h, nearly all irradiated HSs enhanced BCP (average 39% increase relative to nonirradiated controls, standard error = 7.5%, n = 16). UV exposure of HSs also increased bacterial respiration (by ∼18%, standard error = 5%, n = 4), but less than BCP, resulting in an average increase in BGE of 32% (standard error = 10%, n = 4). Photoenhancement of BCP did not correlate to HS bulk properties (i.e., elemental and chemical composition). However, when the photoenhancement of BCP was normalized to absorbance, several trends with HS origin and extraction method emerged. Absorbance-normalized hydrophilic acid and humic acid samples showed greater enhancement of BCP than hydrophobic acid and fulvic acid samples. Furthermore, absorbance-normalized autochthonous samples showed ∼10-fold greater enhancement of BCP than allochthonous-dominated samples, indicating that the former are more efficient photoproducers of biological substrates.

scholarly journals Drying Lakes: A Review on The Health Conditions and Restoration Strategies

2020 ◽  
Author(s):  
Anchita Anchita ◽  
Kamshat Tussupova ◽  
Peder Hjorth
Keyword(s):  
Water Level ◽  
Lake Water ◽  
Saline Lakes ◽  
Saline Lake ◽  
Dust Storms ◽  
Water Levels ◽  
Aral Sea ◽  
Water Withdrawal ◽  
Local Context ◽  
Lake Urmia

<p><strong>Abstract: </strong>Decrease of saline lakes, which comprises of 44% of all the available lake water, is a major concern. It additionally brings to desertification process to the region. Thus, various countries have taken different actions in protecting their lake’s water level. The aim of this paper is to assess different strategies directed to tackle the decreasing saline lake water levels. Lake Urmia and the Aral Sea which split into North Aral and South Aral were among the world's largest saline lakes and now have reduced to 10% of their original size. A thorough review of academic reports, official documents and databases were considered. Although the dry-up of the lake is a natural process, it has been sped up by human interventions in the hydrology cycle. Dust storms (strong winds) in the case of the Aral Sea, transmit the pollutants from dry lake surface which initially accumulated in the lakebed causing severe health issue. Various strategies were implemented to manage the socio-economic conditions caused due to the drying of lakes. The strategy implemented for the North Aral Sea was to restore the lake by reducing the water withdrawal from tributary rivers which leads to increased water level in the sea. The strategy implemented for Lake Urmia was to restore the lake by water transfer activities from neighbouring water sources which until now show no increase in water level. The strategy implemented for the South Aral Sea was to use a dry lakebed to diversify the economy by oil and mineral extraction which shows the adaptation to the environmental conditions with no restoration strategy. As a conclusion, it is found that there is no common best solution for this kind of problem. The best fit depends on the local context and it is strongly path dependent.<strong> </strong></p><p>Keywords: Drying saline lake; Dust storms; Aral sea; Health impacts; Lake Urmia; Restoration of saline lake; Strategies.</p>

scholarly journals Chemistry of Bottom Sediments from Selected Karst Lakes in the Vicinity of Staszów (Nida Basin)

2020 ◽  
Vol 20 (2) ◽  
pp. 81-87
Author(s):  
Artur Zieliński ◽  
Adam Choiński ◽  
Sylwia Machula ◽  
Agnieszka Ławniczak ◽  
Agnieszka Strzelczak
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Bottom Sediments ◽  
Lake Water ◽  
Chemical Elements ◽  
Field Investigation ◽  
Organic Substances ◽  
Karst Lakes ◽  
Wide Range ◽  
Measurement Results

AbstractThe aim of this study was to reveal the chemical composition of bottom sediments in karst lakes located in the northern part of Połaniec Basin (eastern part of the Nida Basin, vicinity of Staszów municipality). A field investigation was carried out in 2010 on four lakes: Duży Staw, Donica, Dziki Staw and Łajba. The contents of a very wide range of chemical elements were determined, which is a rarity. On the basis of our research, it was found that the analysed lakes differed considerably between each other in spite of their close location. In general, sediments contained fair amounts of organic substances as well as Fe, Al, Ca and Mg due to the type of source rock and soligenic lake water supply. Increased concentrations of V, Cr and Ni might be explained by the weathering of rock material. In turn, higher contents of Zn, Pb, Cu and Co in the bottom sediments from Duży Staw indicated anthropopression. The measurement results obtained in this study will allow a future comparative analysis with bottom sediments from other lakes.

Chemical Characterization of Saline Lake and Playa Salts in Qaidam Basin: Implications for Climates of Planet Earth and Mars

2021 ◽  
Author(s):  
Wanyu Liu ◽  
Jun Li ◽  
Luis Santos ◽  
Johan Boman ◽  
Xiying Zhang ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Saline Lakes ◽  
Saline Lake ◽  
Qaidam Basin ◽  
Chemical Characterization ◽  
Physicochemical Characteristics ◽  
Global Scale ◽  
Factors Affecting ◽  
Complex Chemical Composition ◽  
The Common

<p>Salt aerosol from saline lakes and playas has been recognized to affect climate in the global scale, but the understandings of the chemical and physical natures of these salts are still limited due to their complex chemical composition. The Qaidam Basin, one of the largest and driest deserts on Earth, is composed of many saline lakes and is regarded as a good terrestrial analogue for Mars due to similar environment conditions and elementary composition(Xiao et al., 2017). The study on the chemical characteristics of salts from Qaidam Basin is helpful to explore their influences on climate and reveal the physical and chemical factors affecting the paleoclimate of both Planet Earth and Mars.</p><p> </p><p>In this study, four types of salt samples (brines, crystalized brines, lakebed salts and crust salts) collected at and near four saline lakes (Chaka, Keke, Qarhan and Mang’ai) in the Qaidam Basin are studied for their physicochemical characteristics. The common cations (Na<sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup> and Ca<sup>2+</sup>) and anions (Cl<sup>−</sup>, SO<sub>4</sub><sup>2−</sup>, and NO<sub>3</sub><sup>−</sup>) are determined by ion chromatography (IC), and the elemental compositions are measured by energy dispersive X-ray fluorescence (EDXRF) spectrometry. The chemical composition results are analyzed by positive matrix factorization (PMF)(Paatero and Tapper, 1994). The pH of sample brines and solutions are measured, and the governing factors are discussed.</p><p> </p><p>The common elements detected by XRF and IC have excellent consistency. Notably, the crystalized brines exhibit similar ionic compositions with brines, suggesting that the crystalized brines well reflect the complex mineral composition of brines and evaporative crystallization can be used for brine preservation. However, the natural solid salts (lakebed salts and crust salts) present obvious composition differences. Mg<sub>2</sub><sup>+</sup> and SO<sub>4</sub><sup>2-</sup> are primarily found in brines, while the natural solid salts are dominated by NaCl and KCl. The pH of the brines and salt solutions are found to correlate to Mg<sup>2+</sup> concentrations and potentially affected by ambient CO<sub>2</sub> uptake. The electrical conductivities of sample solutions are not linearly scaled by the dilution factors, indicating that balanced reactions and buffer systems exist in the salt textures. Three interpretable factors are identified by the PMF analysis, and the differences of sample types and sampling sites are clearly reflected by the three factors. The lakebed salts (except for the QH lakebed salt) presented excellently correlation with the crust salts, and the crystalized salts are greatly correlated with the brines. This study improves the understandings of the physiochemical features of saline lake and playa salts in Qaidam Basin, and the roles that surface salts potentially play in the climate systems of both Planet Earth and Mars are discussed.</p><p> </p><p><strong>Reference</strong></p><p>Paatero, P., and Tapper, U., Environmetrics, 5, 111-126, <strong>1994</strong>.</p><p>Xiao, L., Wang, J., Dang, Y., et al., Earth-Sci Rev, 164, 84-101, <strong>2017</strong>.</p>

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