Navigation Links
Sulphur and iron compounds common in old shipwrecks
Date:5/15/2012

Sulphur and iron compounds have now been found in shipwrecks both in the Baltic and off the west coast of Sweden. The group behind the results, presented in the Journal of Archaeological Science, includes scientists from the University of Gothenburg and Stockholm University.

A few years ago scientists reported large quantities of sulphur and iron compounds in the salvaged 17th century warship Vasa, resulting in the development of sulphuric acid and acidic salt precipitates on the surface of the hull and loose wooden objects.

Other vessels also affected

Similar sulphur compounds have now been discovered also in other shipwrecks both from the Baltic and off the west coast of Sweden, including fellow 17th century warships Kronan, Riksnyckeln and Stora Sofia, the 17th century merchant vessel in Gothenburg known as the Gta wreck, and the Viking ships excavated at Skuldelev in Denmark.

"This is a result of natural biological and chemical processes that occur in low-oxygen water and sediments," explains Yvonne Fors from the University of Gothenburg's Department of Conservation, one of the scientists behind the study in collaboration with Stockholm University.

Preventive action possible

Besides the Vasa, similar problems have previously been reported for Henry VIII's flagship Mary Rose in the UK, which sank off Portsmouth in 1545, and the Dutch vessel Batavia in Australia, which was lost in 1629, the year after the Vasa.

"Our work on the Vasa and the Mary Rose has given us a good insight into these problems," Yvonne Fors says. "With the right actions, such as new preservation procedures, we'll be better able to prevent these shipwrecks from developing such serious problems with sulphuric acid."

Toxic hydrogen sulphide reacts with wood

Even in low-oxygen-water, bacteria can break down organic material including the wood cells in a vessel's hull. Sulphates that occur naturally in the water are transformed by bacteria into toxic hydrogen sulphide which reacts with the wood. In the presence of iron ions, sulphur and iron compounds form which readily oxidise into sulphuric acid and acid salt precipitates in a damp museum environment once the vessel has been recovered.

"For some of the wrecks, such as the Skuldelev Viking ships and the Gta wreck, the conservation treatment is already finished," says Fors. "It's then a matter of keeping an eye on the chemical developments, which requires additional resources."


'/>"/>

Contact: Yvonne Fors
yvonne.fors@conservation.gu.se
46-070-443-0007
University of Gothenburg
Source:Eurekalert  

Related biology news :

1. Sulphur in just one hair could blow a terrorists alibi
2. Duke team finds compounds that prevent nerve damage
3. Discovery of natural compounds that could slow blood vessel growth
4. New $11 million center to speed production of new compounds for drug discovery
5. 3-substituted indolones as novel therapeutic compounds for neurodegenerative conditions
6. Scripps research scientists identify compounds for stem-cell production from adult cells
7. Two new compounds show promise for eliminating breast cancer tumors
8. 2 new compounds show promise for eliminating breast cancer tumors
9. Grape-seed extract kills laboratory leukemia cells, proving value of natural compounds
10. Compounds could be new class of cancer drugs
11. MSU discoveries upend traditional thinking about how plants make certain compounds
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Sulphur and iron compounds common in old shipwrecks
(Date:6/2/2016)... The Department of Transport Management (DOTM) ... million US Dollar project, for the , Supply ... Enrolment, and IT Infrastructure , to ... implementation of Identity Management Solutions. Numerous renowned international vendors participated ... was selected for the most compliant and innovative ...
(Date:6/1/2016)... 1, 2016 Favorable Government Initiatives ... and Criminal Identification to Boost Global Biometrics System Market ... TechSci Research report, " Global Biometrics Market By ... and Opportunities, 2011 - 2021", the global biometrics market ... on account of growing security concerns across various end ...
(Date:5/16/2016)... 2016   EyeLock LLC , a market leader ... of an IoT Center of Excellence in ... development of embedded iris biometric applications. EyeLock,s ... and security with unmatched biometric accuracy, making it the ... DNA. EyeLock,s platform uses video technology to deliver a ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... PHILADELPHIA , June 27, 2016  Liquid ... today announced the funding of a Sponsored Research ... study circulating tumor cells (CTCs) from cancer patients.  ... changes in CTC levels correlate with clinical outcomes ... therapies. These data will then be employed to ...
(Date:6/24/2016)... ... 24, 2016 , ... While the majority of commercial spectrophotometers and fluorometers use ... 6000i models are higher end machines that use the more unconventional z-dimension of 20mm. ... from the bottom of the cuvette holder. , FireflySci has developed several Agilent ...
(Date:6/23/2016)... CAMBRIDGE, Mass. , June 23, 2016 /PRNewswire/ ... the development of novel compounds designed to target ... compound, napabucasin, has been granted Orphan Drug Designation ... in the treatment of gastric cancer, including gastroesophageal ... cancer stemness inhibitor designed to inhibit cancer stemness ...
(Date:6/23/2016)... ... 23, 2016 , ... Charm Sciences, Inc. is pleased to ... AOAC Research Institute approval 061601. , “This is another AOAC-RI approval of the ... Vice President of Regulatory and Industrial Affairs. “The Peel Plate methods perform comparably ...
Breaking Biology Technology: