Radiocarbon Articles & Analysis
11 articles found
This article focuses on prominent isotopic systems employed in soil studies, including radiocarbon (14C) dating, lead (Pb) isotopes, strontium (Sr) isotopes, and boron (B) isotopes, as well as briefly discussing oxygen (O), carbon (C), and nitrogen (N) ...
The analysis of archaeological artifacts through isotopic techniques has become a cornerstone of modern archaeological research. These methods allow for the investigation of the origins, movements, and interactions of ancient materials, thereby illuminating the complex relationships between humans and their environments over millennia. By employing various isotopic signatures, researchers can ...
In this paper, we present an overview of the results of radiocarbon measurements of biogenic and fossil CO2 from 5 Danish and 4 Swedish waste incineration plants. ...
ASTM International's Committee on Plastics recently approved revisions to standard D6866, Test Methods for Determining the Biobased Content of Solid, Liquid, and Gaseous Samples Using Radiocarbon Analysis. This standard was originally approved in 2004, and is used by the U.S. ...
Hydrogeochemical investigations and spatial variations studies on the distribution of water isotopes and radiocarbon in the groundwater of Žitný Island (Rye Island) were carried out. ...
![Environmental biodegradability of [14C]SWNT by Trametes versicolor and natural microbial cultures found in New Bedford Harbor sediment and aerated wastewater treatment plant sludge](https://d32zuqhgcrpxli.cloudfront.net/eyJidWNrZXQiOiJlZS1maWxlcyIsImtleSI6ImZpbGVzLzQ4NzQvaW1hZ2VzLzQ4NzRfMF8yMDIwMDcyMTEzMjQwMjM0NjI3NzguanBnIiwiZWRpdHMiOnsicmVzaXplIjp7ImZpdCI6ImNvbnRhaW4iLCJiYWNrZ3JvdW5kIjp7InIiOjI1NSwiZyI6MjU1LCJiIjoyNTUsImFscGhhIjoxfSwid2lkdGgiOjI0MCwiaGVpZ2h0IjoxNDV9fX0= "Environmental biodegradability of [14C]SWNT by Trametes versicolor and natural microbial cultures found in New Bedford Harbor sediment and aerated wastewater treatment plant sludge")
The mixed cultures were chosen as more environmentally‐relevant media where SWNT will likely be deposited. [14C] activity was assessed in solid, aqueous, and 14CO2 gaseous phases to determine amounts of intact SWNT, partially soluble SWNT degradation products, and mineralized SWNT, respectively, during the six months of the experiment. Mass balances based on radiocarbon activity ...
One of the most significant is ASTM D6866, Test Methods for Determining the Biobased Content of Solid, Liquid and Gaseous Samples Using Radiocarbon Analysis. Borns points out that this standard has been adopted by the U.S. ...
At Armstrong, a standard from ASTM International Committee D20 on Plastics provides a method to quantify biobased content in its ceiling and flooring products: D6866, Test Methods for Determining the Biobased Content of Solid, Liquid and Gaseous Samples Using Radiocarbon Analysis. ASTM D5116, Guide for Small-Scale Environmental Chamber Determinations of Organic Emissions From ...
We analyzed measured SOC time series from 1977 to 2004 and applied soil fractionation, radiocarbon dating, and modeling with the carbon model RothC. The SOC declined significantly in most parcels, but was not systematically different between systems. ...
Soil profiles contained a minimum in C content within the top 35 cm of the profile which originated from a rapid deposition from low C upland soils. Radiocarbon and radioisotope dating showed that increases in C above this minimum were the result of C sequestered in the past ~50 yr. ...
Uncorrected accelerator mass spectrometry (AMS) radiocarbon dates of mollusc shells show that the depositional environment was marine since 6.2 ka, becoming gradually more brackish as a result of progradation of the Pearl River delta. ...