Rapid biotic molecular transformation of fulvic acids in a karst aquifer
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چکیده
منابع مشابه
Rapid biotic molecular transformation of fulvic acids in a karst aquifer
The study of molecular transformation processes of dissolved organic carbon (DOC) in the environment significantly contributes to a better understanding of the global biogeochemical organic matter cycle. In an oxic karst groundwater system, in which the most powerful abiotic DOC degradative reactions, photodegradation and metal-mediated redox chemistry, are at best marginal contributors, a near...
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Fulvic acids are active principles in humic substances allowing big absorption of mineral ions from soil through vegetables. They are formed by large organic molecules having several reactive sites. Tested in mice and rats with radioactive labeled ions (Ca, PO4, Fe and I) in drinking water, it has been found that for even concentrations of mineral ions (μg/ml), more than double of them are filt...
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The article “Characteristics of Point Recharge in Karst Aquifers, Water 6: 2782–2807” by N. Somaratne evaluates various recharge estimation techniques applied to four limestone aquifers in South Australia. Somaratne [1] concludes that methods based on watertable fluctuations, groundwater modelling and water budgets are independent of recharge processes, and are therefore superior to the chlorid...
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The karstic Rijab Spring with an average discharge of 3290 l/s is located in the Alvand River basin in the northwest of the Zagros, Iran, which drains Asmari formation. To investigate groundwater flow in the catchment area of the Spring, the physicochemical parameters include major cations and anions, discharge, EC, pH, and temperature were studied from September 2000-2002. The results indicate...
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The presence oí aggregates oí humic substances (HS) with inorganic adsorbates in a lagaon located in Huelva (south Spain) ia reported. The chemical nature oftbe fulvic acid (FA) fraction, extracted froro the natura] aggregate by treatment with chelating resins, has been investigated by physical and chemical methods. Tbe results suggest that these FA are similar f.o FA from other aquatic environ...
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ژورنال
عنوان ژورنال: Geochimica et Cosmochimica Acta
سال: 2007
ISSN: 0016-7037
DOI: 10.1016/j.gca.2007.09.024