Abstract Chronic kidney disease of unknown etiology (CKDu) becomes a health concern in developing countries. It is urgent to recognize CKDu-related groundwater CKDu-prevalent areas. Here, spectral indices showed that DOM from CKDu was characterized by higher molecular weight, stronger exogenous feature, and greater degree humification unsaturation than non-CKDu groundwater. Parallel factor anal...

In this study, the extraction and characterization of aquatic humic substances (AHS) from two blackwater rivers in Amazon basin was carried out order to assess seasonal effects AHS structure. addition, an investigation complexing capacities (CC) structures containing metal ions CdII, NiII PbII also done. The (of AHS) done using UV-Vis, molecular fluorescence, infrared spectroscopy. Negro River ...

In the search for the mechanisms involved in the immobilization of organic nitrogen in humified remains of vascular plants, the efforts of the present investigation were directed toward the examination of the transformation of nitrogenous compounds during the peat and coal stage by means of solid-state nuclear magnetic resonance (NMR) spectroscopy. While accumulation of heteroaromatic-N is not ...

[1] The surface pattern of vegetation influences the composition and humification of peat laid down during the development of a bog, producing a subsurface hydrological structure that is expected to affect both the rate and pattern of water flow. Subsurface peat structures are routinely derived from the inspection of peat cores. However, logistical limits on the number of cores that can be coll...

Improving cell performance and durability through both new materials and membrane electrode processing optimization is needed for the commercialization of alkaline membrane fuel cell (AMFC) technologies. In this work, we adopted an in-situ cross-linking strategy of an anion-conducting block copolymer to prepare durable ionomers for use in alkaline membrane fuel cells (AMFCs). Our goal was to us...

Alteration of the composition of soil organic matter (SOM) in Inner Mongolian grassland soils associated with the duration of grazing exclusion (GE) has been considered an important index for evaluating the restoring effects of GE practice. By using five plots from a grassland succession series from free grazing to 31-year GE, we measured the content of soil organic carbon (SOC), humic acid car...