Context. The Origins, Spectral Interpretation, Resource Identification, and Security-Regolith Explorer (OSIRIS-REx) mission detected an infrared absorption at 3.4 ?m on near-Earth asteroid (101955) Bennu. This is indicative of carbon species, including organics, the surface. Aims. We aim to describe composition organic matter Bennu by investigating spectral features in detail. Methods. use a cu...

background: due to the increasing pollution of water resources, this study was carried out for evaluation of water quality pollution indices for monitoring of heavy metals (as, zn, pb and cu) contamination in ghahavand plain, hamadan province, western iran during spring and summer 2012. methods: totally, 20 ground water wells were chosen randomly. the samples were filtered (0.45 μm) and maintai...

In recent years, with an increase in the stringent water quality regulations due to environmental concerns, extensive research has focused on upgrading current water treatment technologies and developing more economical processes that can effectively deal with toxic and biologically refractory organic contaminants in wastewater. In this context, in order to avoid or mitigate the possible advers...

Most physical properties of short chain organosulfate aerosol cannot be approximated by salts or similar sized organics.

Spring flooding of the Red River of the North (RR) is common, but little information exits on how these flood events affect water and overbank sediment quality within an urban area. With the threat of the spring 2009 flood in the RR predicted to be the largest in recorded history and the concerns about the flooding of farmsteads, outbuildings, garages, and basements, the objectives of this stud...

The presence of calcium and humic substances or natural organic matter (NOM) in surface waters can cause severe fouling of nanofiltration (NF) membranes. Conditions of fouling were studied using a stainless steel stirred cell of volume 185 mL and a membrane area of 21.2*10-4m2 at a transmembrane pressure of 5 bar. Deposition of organic matter was determined by mass balance in feed and concentra...

[1] Significantly older C ages by 2500–7900 years are found for sedimentary total organic carbon (TOC) when compared to ages of codeposited surface-dwelling foraminifera in the southern Okinawa Trough. This age discrepancy increases with rising sea level since the Last Glacial Maximum. A progressive shift in TOC dC toward more negative values with rising sea level reflects an increasing fractio...

Introduction and Motivation: Apart from Earth, Mars and Europa are the most likely worlds in our solar system on which evidence of present or past life may be found. In the case of Earth, we concluded that impact delivery of organics, in particular amino acids, could have played an important role in the organic inventory of the early Earth [1]. This was a result more optimistic with respect to ...