Featured Research

from universities, journals, and other organizations

Pulp and paper manufacture: Pulp friction cleans up 'Brockovich' chemical

Date:
October 10, 2013
Source:
Inderscience Publishers
Summary:
A byproduct of the manufacture of pulp using the sulfite process for making paper, sodium lignosulfonate, can be used to immobilize and soak up toxic chromium compounds from soil and water, according to new research.

A byproduct of the manufacture of pulp using the sulfite process for making paper, sodium lignosulfonate, can be used to immobilize and soak up toxic chromium compounds from soil and water, according to research published in the International Journal of Innovation and Sustainable Development.

Konstantin Volchek and Carl Brown of Environment Canada, and Dario Velicogna of Velicogna Consultants Inc in Ottawa, have carried out two successful parallel tests of efficacy on a laboratory scale. The first involved removal of chromium ions from water using reagent binding and membrane separation and the second was the stabilization of chromium ions in the soil using chemical soil flushing. Lignosulfonates can bind hexavalent chromium and allow it to be removed from contaminated water by subsequent membrane filtration. The soil tests showed that lignosulfonates can reduce the mobility of chromium so that it becomes trapped within the soil matrix; in the field this would reduce the risk of it leaching from a contaminated site into the underlying water table or waterways.

Chromium has many uses in industry but its accidental and even deliberate release into the environment has led to widespread contamination of soil and water. However, chromium salts are also naturally present in rock and soil at relatively high concentration in certain parts of Greece, Italy and the USA. Chromium(III), which carry a 3+ electrical charge and chromium(VI) 6+ charge are the most stable and so the most common. Cr(III) is not very soluble and although it has some toxicity it is the highly soluble and so mobile Cr(VI) that is a significant cause for environmental and health concerns. Cr(VI) ions are both toxic and cancer causing.

There are various technologies that might be used to extract chromium(VI) ions from contaminated soil or water. However, these usually require the addition of expensive chemicals to allow the heavy metal ions to be extracted or immobilized. A much more sustainable approach would be to use a reagent that was just as effective or more so and that was itself a waste product from industry. Sodium salts of lignosulfonates from the paper industry offer such an alternative, the researchers say.

"Inexpensive, effective and easy to use reagents that reduce chromium toxicity and mobility would make a remediation technology more attractive and competitive," Volchek and colleagues reports. The lignosulfonate first reduces toxic Cr(VI) ions to the less soluble and less hazardous Cr(III) and these bind strongly to the lignosulfonate molecules and can then be removed by membrane filtration.


Story Source:

The above story is based on materials provided by Inderscience Publishers. Note: Materials may be edited for content and length.


Journal Reference:

  1. Konstantin Volchek, Carl E. Brown, Dario Velicogna. Evaluation of sodium lignosulfonate for the remediation of chromium-contaminated soil and water. International Journal of Innovation and Sustainable Development, 01/2013; 7(3):289-302

Cite This Page:

Inderscience Publishers. "Pulp and paper manufacture: Pulp friction cleans up 'Brockovich' chemical." ScienceDaily. ScienceDaily, 10 October 2013. <www.sciencedaily.com/releases/2013/10/131010124738.htm>.
Inderscience Publishers. (2013, October 10). Pulp and paper manufacture: Pulp friction cleans up 'Brockovich' chemical. ScienceDaily. Retrieved September 20, 2014 from www.sciencedaily.com/releases/2013/10/131010124738.htm
Inderscience Publishers. "Pulp and paper manufacture: Pulp friction cleans up 'Brockovich' chemical." ScienceDaily. www.sciencedaily.com/releases/2013/10/131010124738.htm (accessed September 20, 2014).

Share This



More Earth & Climate News

Saturday, September 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Wildfires in CA Burn Forest Asunder

Raw: Wildfires in CA Burn Forest Asunder

AP (Sep. 18, 2014) An out-of-control Northern California wildfire has nearly 2,800 people from their homes as it continues to grow, authorities said Thursday. Authorities said a man has been arrested on suspicion of arson for starting the fire on Saturday. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Elephant Undergoes Surgery in Tbilisi Zoo

Raw: Elephant Undergoes Surgery in Tbilisi Zoo

AP (Sep. 18, 2014) Grand the elephant has successfully undergone surgery to remove a portion of infected tusk at Tbilisi Zoo in Georgia. British veterinary surgeons used an electric drill to extract the infected piece. (Sept. 18) Video provided by AP
Powered by NewsLook.com
Raw: Scientists Examine Colossal Squid

Raw: Scientists Examine Colossal Squid

AP (Sep. 16, 2014) Squid experts in New Zealand thawed and examined an unusual catch on Tuesday: a colossal squid. It was captured in Antarctica's remote Ross Sea in December last year and has been frozen for eight months. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Man Floats for 31 Hours in Gulf Waters

Man Floats for 31 Hours in Gulf Waters

AP (Sep. 16, 2014) A Texas man is lucky to be alive after he and three others floated for more than a day in the Gulf of Mexico when their boat sank during a fishing trip. (Sept. 16) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins