Featured Research

from universities, journals, and other organizations

Olive Industry Waste, Such As Olive Pits, Pomace And Pruning Remains Used To Decontaminate Sewage

Date:
June 4, 2009
Source:
University of Granada
Summary:
Olive waste obtained during the oil extraction process may be used to eliminate heavy metals from sewage or waste waters of productive activities. The olive industry produces great amounts of such sub-products in and their cost is very low or nothing; sometimes, their management can even be a problem.

The waste obtained from olive during the oil extraction process can be used to eliminate heavy metals from sewage or waste waters of productive activities. Olive pits, pomace and remains (from olive tree pruning) present an outstanding capacity to retain the lead present in this water, which confirms their capacity as biosorbents for their application in the depuration of effluents on an industrial scale.

This is one of the main conclusions of the doctoral thesis "Characterization and application of residual biomass for the elimination of heavy metals" carried out by Mª Ángeles Martín Lara in the department of Chemical Engineering of the University of Granada, which has been supervised by professors Francisco Hernáinz Bermúdez de Castro, Gabriel Blázquez García and Mónica Calero de Hoces. 

Given the high la toxicity of heavy metals in solution on the ecosystem, one of the main problems of this industry at present is that there are not many metabolisation routes by the living beings or of degradation by the environment, and some of them have a limited capacity. This recalcitrance, together with an excessive deposit to the environment, usually of anthropogenic origin, generates serious environmental problems that sometimes are difficult to control.

A “clean” alternative

Biotechnological processes have attracted the attention of the scientific community due to the variety of detoxification methods of heavy metals. Among them, according to the UGR researchers, “biosortion represents a viable alternative technical and economically, both for its depuration capacity and its economic operation cost, it has also been considered as a “clean” technology in the elimination of heavy metals in sewage and waste waters of productive activities”.

The UGR scientists have studied the capacity of these three solid residues obtained from olive oil industry (olive pits, pomace and pruning remains) to depurate effluents with lead in dissolution, both in mono-metallic systems (lead only) and in bi-metallic systems (lead and chromo).

Olive industry produces great amounts of such sub-products in Andalusia and their costs are very low or even nothing; sometimes, their management can become a problem. Their use as biosorbents of heavy metals, according to the researchers of the UGR, “makes them a very desirable alternative, as they would have an extra value before their final elimination”.

Lead retention takes place in a very fast way with the three biosorbents used. The process becomes faster when using pruning remains; similar results have been obtained when using pits and pomace.

The work carried out at the UGR has also revealed that the three biosorbents analyzed present a higher affinity for lead than for chromo as the lead biosortion capacity is significantly higher. When two heavy metals are present in an environment, the capacity of biosortion is lower, which could be connected, according to the researchers, with the interferences produced between both ions in the points of sortion.


Story Source:

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


Cite This Page:

University of Granada. "Olive Industry Waste, Such As Olive Pits, Pomace And Pruning Remains Used To Decontaminate Sewage." ScienceDaily. ScienceDaily, 4 June 2009. <www.sciencedaily.com/releases/2009/06/090603091304.htm>.
University of Granada. (2009, June 4). Olive Industry Waste, Such As Olive Pits, Pomace And Pruning Remains Used To Decontaminate Sewage. ScienceDaily. Retrieved September 18, 2014 from www.sciencedaily.com/releases/2009/06/090603091304.htm
University of Granada. "Olive Industry Waste, Such As Olive Pits, Pomace And Pruning Remains Used To Decontaminate Sewage." ScienceDaily. www.sciencedaily.com/releases/2009/06/090603091304.htm (accessed September 18, 2014).

Share This



More Earth & Climate News

Thursday, September 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

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
Researchers Explore Shipwrecks Off Calif. Coast

Researchers Explore Shipwrecks Off Calif. Coast

AP (Sep. 16, 2014) — Federal researchers are exploring more than a dozen underwater sites where they believe ships sank in the treacherous waters west of San Francisco in the decades following the Gold Rush. (Sept. 16) Video provided by AP
Powered by NewsLook.com
Isolated N. Korea Asks For International Help With Volcano

Isolated N. Korea Asks For International Help With Volcano

Newsy (Sep. 16, 2014) — Mount Paektu volcano in North Korea is showing signs of life and there's not much known about it. Video provided by Newsy
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