UV-visible absorbance spectroscopy as a proxy for peatland dissolved organic carbon (DOC) quantity and quality: considerations on wavelength and absorbance degradation
نویسندگان
چکیده
منابع مشابه
Quantifying tropical peatland dissolved organic carbon (DOC) using UV-visible spectroscopy.
UV-visible spectroscopy has been shown to be a useful technique for determining dissolved organic carbon (DOC) concentrations. However, at present we are unaware of any studies in the literature that have investigated the suitability of this approach for tropical DOC water samples from any tropical peatlands, although some work has been performed in other tropical environments. We used water sa...
متن کاملInvestigations of freezing and cold storage for the analysis of peatland dissolved organic carbon (DOC) and absorbance properties.
Although measured rates of biological degradation of DOC are typically low under dark conditions, it is assumed that water samples must be analysed soon after collection to provide an accurate measure of DOC concentration and UV-visible absorbance. To examine the impact of storage on DOC quality and quantity, we took water samples from an ombrotrophic peatland, and stored them in the dark at 4 ...
متن کاملEffects of salinity changes on the photodegradation and ultraviolet–visible absorbance of terrestrial dissolved organic matter
We performed laboratory studies to determine the effects of salinity on the photodegradation of dissolved organic matter (DOM) from the Great Dismal Swamp, Virginia, an important source of terrestrial DOM to the lower Chesapeake Bay. Samples were created by mixing Great Dismal Swamp water (ionic strength < 0 mol L21) with modified artificial seawater solutions of differing salinities while keep...
متن کاملUltraviolet absorbance as a proxy for total dissolved mercury in streams.
Stream water samples were collected over a range of hydrologic and seasonal conditions at three forested watersheds in the northeastern USA. Samples were analyzed for dissolved total mercury (THg(d)), DOC concentration and DOC composition, and UV(254) absorbance across the three sites over different seasons and flow conditions. Pooling data from all sites, we found a strong positive correlation...
متن کاملغلظت کربن آلی و پتانسیل تشکیل فرآورده‌های جانبی گندزدایی در آب شرب شبکه توزیع آب تهران در برخی مواقع سال
Background and Aim: Natural organic matter (NOMs), measured on the basis of organic carbon, produces disinfection by-products precursors (DBPs) during the chlorination process. Some DBPs are carcinogenic. NOMs are not completely removed by conventional water treatment. As a result, in addition to forming DBPs, they support bacterial regrowth in the water distribution systems and cause unpleasan...
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ژورنال
عنوان ژورنال: Environmental Science: Processes & Impacts
سال: 2014
ISSN: 2050-7887,2050-7895
DOI: 10.1039/c4em00108g