Aquatic organic matter fluorescence

TL;DR: This work compares the performance of in-situ measurements of FDOM with laboratory measurements of fluorescence spectroscopy within the context of two distinct glacierized watersheds in Peru and shows that the three techniques together were able to capture the DOM dynamics for both studied watersheds.

TL;DR: In this paper, fluorescence and absorption measurements of the samples collected from a surface microlayer (SML) and a subsurface layer (SS), at a depth of 1 m, were studied during three research cruises in the Baltic Sea along with hydrophysical studies and meteorological observations.

TL;DR: In this article , Hou et al. investigated the effect of Husk, Biochar, and CharSil husk amendments on soil organic carbon (SOC) preservation and production of carbon dioxide (CO2) and methane (CH4), which are greenhouse gases (GHG).

Abstract: Membranes remove contaminants from drinking water, but require routine cleaning with harsh chemicals that are less conveniently accessed, handled, and disposed of in remote communities. This work demonstrates a non-chemical solar cleaning alternative using simulated sunlight that has been conveniently directed through a light-transmitting porous glass substrate to a thin TiO 2 photocatalytic membrane coating. Dead-end filtration of non-potable water with routine chemical-free backwashing showed the solar cleaning provided a 4.5-fold extension to the time needed before a chemical clean, as well as a 50% reduction in filtration pump electricity demand. These improvements were attributed to formation of hydroxyl radicals and subsequent oxidation of organic foulants, as well as the well-known photocatalytic superhydrophilic surface stimulation of TiO 2 surfaces. Both effects acted together to reduce irreversible surface attachment of organic foulants. Size exclusion chromatography (SEC) indicated the effect only targeted the organic molecule-membrane surface interaction as little change was observed to bulk organics profiles. Substrate light transmission onto photocatalytic membrane surfaces demonstrated in this work could be successfully applied as a membrane cleaning method during water treatment in remote communities. Future explorations can be made into potential for enhanced disinfection and anti-fouling functions on wider ranges of organic contaminated water supplies.

TL;DR: Standard Methods for the Examination of Water and Wastewater seventh edition, Standard methods for the examination of water and wastewater seventh edition , کتابخانه دیجیتال جندی اهواز.

TL;DR: In this paper, a tutorial on the Partial Least Squares (PLS) regression method is provided, and an algorithm for a predictive PLS and some practical hints for its use are given.

TL;DR: Localized Chemical bonding Delocalized Chemical Bonding Bonding Weaker than Covalent Stereochemistry Carbocations, Carbanions, Free Radicals, Carbenes and Nitrenes Mechanisms and Methods of Determining them Photochemistry Acids and Bases Effects of Structure on Reactivity Aliphatic Nucleophilic Substitution Aromatic Electrophilic Substitutes Aliphatically Electrophilic Substitution Free-Radical Substitution Addition to Carbon-Carbon Multiple Bonds Adding to Carbon Hetero Multiple Bonds Eliminations Rearrangements Ox

TL;DR: Aromatic carbon and the presence of specific aromatic compounds resulted in EEMs that aided in differentiating wastewater effluent DOM from drinking water DOM, and the highest cumulative EEM volume was observed for hydrophobic neutral DOM fractions.