Navigation Links
Onion soaks up heavy metal
Date:12/10/2012

Onion and garlic waste from the food industry could be used to mop up hazardous heavy metals, including arsenic, cadmium, iron, lead, mercury and tin in contaminated materials, according to a research paper published in the International Journal of Environment and Pollution.

Biotechnologists Rahul Negi, Gouri Satpathy, Yogesh Tyagi and Rajinder Gupta of the GGS Indraprastha University in Delhi, India, explain how waste from the processing and canning of onion (Allium cepa L.) and garlic (Allium sativum L.) could be used as an alternative remediation material for removing toxic elements from contaminated materials including industrial effluent. The team has studies the influence of acidity or alkalinity, contact time, temperature and concentration of the different materials present to optimize conditions for making a biological heavy metal filter for industrial-scale decontamination.

They have found that at 50 Celsius (122 Fahrenheit), the efficiency of the clean-up process is largely dependent on pH (acidity or alkalinity) and equilibration time usually occurs within half an hour; a pH of 5 was optimal. They demonstrated the maximum extraction was achievable for lead, one of the most troublesome metallic environmental pollutants. They could extract more than 10 milligrams per gram of Allium material from a test solution containing 5 grams per liter of mixed metal ion solution, amounting to recovery efficiency of more than 70%. The absorbed metals can be released into a collecting vessel using nitric acid and the biomass reused.

The team experimented with Allium biomass to demonstrated effective removal of heavy metals from both simulated and actual industrial effluents. "The technique appears to be industrially applicable and viable," they suggest. "This may provide an affordable, environmental friendly and low maintenance technology for small and medium scale industries in developing countries," they conclude.


'/>"/>

Contact: Albert Ang
press@inderscience.com
Inderscience Publishers
Source:Eurekalert

Related biology news :

1. Nano-velcro clasps heavy metal molecules in its grips
2. Earthworms soak up heavy metal
3. Handful of heavyweight trees per acre are forest champs
4. Kinesiology team gets $975,000 Defense grant to study effects of heavy loads on soldiers
5. SETAC announces Chris Lee Award for metals research winner, Kevin Brix
6. Sweet new approach discovered to help produce metal casting parts, reduce toxicity
7. Measuring mercury levels: Nano-velcro detects water-borne toxic metals
8. Increase in metal concentrations in Rocky Mountain watershed tied to warming temperatures
9. A new avenue to better medicines: Metal-peptide complexes
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/2/2017)... Summary This report provides all the information ... partnering interests and activities since 2010. Download the ... Deals and Alliance since 2010 report provides an in-depth ... world,s leading life sciences companies. On demand ... of the most up to date deal and company ...
(Date:2/28/2017)... 28, 2017 News solutions for biometrics, bag ... ... from 14 to 16 March, Materna will present its complete ... seamless travel is a real benefit for passengers. To accelerate ... their passenger touch point solutions to take passengers through the complete ...
(Date:2/22/2017)... 2017 With the biometrics market to ... four technologies that innovative and agile startups must ... in the changing competitive landscape: multifactor authentication (MFA), ... "Companies can no longer afford to ... Dimitrios Pavlakis , Industry Analyst at ABI ...
Breaking Biology News(10 mins):
(Date:3/29/2017)... 2017  Applied BioMath ( www.appliedbiomath.com ), ... drug research and development, today announced an ... for quantitative systems pharmacology (QSP) support for ... treatment of cancer. Applied ... toxicology studies and first-in-human dose predictions for ...
(Date:3/29/2017)... ... March 29, 2017 , ... Cancer diagnostics and pathology ... 513 at the Association of Community Cancer Centers (ACCC) 43rd Annual Meeting, ... CANCERSCAPE unites key stakeholders from leading national organizations to share insights on how ...
(Date:3/29/2017)... , March 29, 2017 /PRNewswire/ - The University of ... Nordion, a business of Sterigenics International, and General Atomics ... been submitted to the U.S. Nuclear Regulatory Commission (NRC). ... production of molybdenum-99 (Mo-99). Once operational, production from this ... U.S. demand for Mo-99, which currently must be imported ...
(Date:3/28/2017)... ... March 28, 2017 , ... ... American Association for the Advancement of Science (AAAS), the world's largest general ... will enhance its high-impact scholarly collection across its cross-platform reference management system. ...
Breaking Biology Technology: