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:3/14/2016)... March 14, 2016 NXTD ) ("NXT-ID" ... commerce market, announces the airing of a new series of ... week of March 21 st .  The commercials will air ... popular Squawk on the Street show. --> NXTD ... growing mobile commerce market, announces the airing of a new ...
(Date:3/11/2016)... 11, 2016 --> ... report "Image Recognition Market by Technology (Pattern Recognition), by ... by Deployment Type (On-Premises and Cloud), by Industry Vertical ... by MarketsandMarkets, the global market is expected to grow ... Billion by 2020, at a CAGR of 19.1%. ...
(Date:3/9/2016)... March 9, 2016 This BCC Research report ... of the RNA Sequencing (RNA Seq) market for the ... instruments, tools and reagents, data analysis, and services. ... of the RNA-Sequencing market such as RNA-Sequencing tools and ... main factors affecting each segment and forecast their market ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... ... April 29, 2016 , ... Summit for Stem Cell has ... development of a patient-specific stem cell therapy for the treatment of Parkinson’s disease. The ... Jeanne Loring at The Scripps Research Institute in San Diego, CA. , ...
(Date:4/28/2016)... ... April 28, 2016 , ... ... support for Connecticut's innovative, growing companies, today announced the launch of VentureClash ... technology (fintech) companies. , “VentureClash looks to attract the best early-stage ...
(Date:4/27/2016)... ... April 27, 2016 , ... ... testing technology at the Spring 2016 Marijuana Business Conference and Expo. Shimadzu’s high-performance ... solvents, heavy metals, and more. Expo attendees can stop by booth 1021 to ...
(Date:4/27/2016)... ... April 27, 2016 , ... The Board of ... appointment of John Tilton as Chief Commercial Officer.  Mr. Tilton joined Biohaven from ... founding commercial leaders responsible for the commercialization of multiple orphan drug indications. ...
Breaking Biology Technology: