*To whom all correspondence should be addressed. otal organic carbon (TOC) analysis is a fast and effective analytical technique for cleaning validation in pharmaceutical manufacturing. This nonspecific method can be used to test for residues of previously manufactured products, cleaning detergents, chemicals, solvents, by-products, degradants, and microbial contaminants. However, many factors ...

In this study, multi-walled carbon nanotubes (MWNTs) were employed to remove benzene, toluene, ethylbenzene, and xylenes (BTEX) from low and high salinity water pre-equilibrated with crude oil. The treatment endpoint of crude oil-contaminated water is often controlled by BTEX compounds owing to their higher aqueous solubility and human-health toxicity compared to other hydrocarbons. The MWNT so...

[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...

Water, suspended particulate matter (SPM), and sediment samples were collected from ten rivers in Tianjin and analyzed for 16 polycyclic aromatic hydrocarbons (PAHs), dissolved organic carbon (DOC), particulate organic carbon (POC) in SPM and total organic carbon (TOC) in sediment. The behavior and fate of PAHs influenced by these parameters were examined. Generally, organic carbon was the prim...

Simultaneous nitrification/denitrification and trace organic contaminant (TrOC) removal during wastewater treatment by an integrated anoxic-aerobic MBR was examined. A set of 30 compounds was selected to represent TrOCs that occur ubiquitously in domestic wastewater. The system achieved over 95% total organic carbon (TOC) and over 80% total nitrogen (TN) removal. In addition, 21 of the 30 TrOCs...

Appropriate conditions have been achieve d for the accurate, rapid, and highly precise shipboard simultaneous determination of dissolved organic carbon and total dissolved nitrogen in seawater by high tem perature catalytic oxidation. A nitrogen-specific Antek 705D chemiluminescence detector and a CO 2-specific LiCor Li6252 IRGA have been coupled inseries with a Shimadzu TOC-5000 organic carbon...

Analytical determination of organic load (the whole organic substance present in water as dissolved or/and in suspension form) in aqueous matrices is of continuously increasing interest in environmental chemistry. The most used indexes are BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand) and TOC (Total Organic Carbon); various normative and analytical line guides have been elaborat...

We used coupled watershed and reservoir models to evaluate the impacts of deforestation and l Niño Southern Oscillation (ENSO) phase on drinking water quality. Source water total organic carbon (TOC) is especially important due to the potential for production of carcinogenic disinfection byproducts (DBPs). The Environmental Fluid Dynamics Code (EFDC) reservoir model is used to evaluate the diff...