Biotech Articles
Publish Your Research Online
Get Recognition - International Audience

Request for an Author Account   |   Login   |   Submit Article
 
 
HOME FAQ TOP AUTHORS FORUMS PUBLISH ARTICLE
 
 

Phytoremediation For Heavy Metals

BY: Nidhi Uppangala | Category: Environmental-Biotechnology | Submitted: 2010-06-24 18:00:38
       No Photo
Article Summary: "Plants can be used to remove heavy metal from the environment and hence will reduce the toxic effects of heavy metal on health of all living organisms, this is known as phytoremediation..."


Share with Facebook Share with Linkedin Share with Twitter Share with Pinterest Email this article
     


Introduction:


Heavy metals are those with a specific gravity more than 5.0, and these metals at very low concentration damage living organisms and accumulate in the food chain, some of the examples for heavy metals are lead, mercury, chromium, cadmium and many more. Some of the main sources of heavy mental in the environment include sediment from waste water treatment plant, mining waste, municipal and industrial waste.

Plants can be used to remove heavy metal from the environment and hence will reduce the toxic effects of heavy metal on health of all living organisms, this is known as phytoremediation.

Types of Phytoremediation:

1. Phytotransformation, in this type the contaminants from water and soil are absorbed by the roots and they are transformed in other parts of the plant like leaves, stem

2. Rhizosphere Remediation, here transformation of contaminants occur in the root itself, hence it increases the organic carbon, bacterial and fungal population.

3. Phytostabilization, here movement of contaminants are restricted to the area of vegetation or immobilizes the contaminants.

4. Phytoextraction, here the plants are used to extract the metals from the soil and these metals gets accumulated in the parts of the plants, such as root, stem, leaves and then these metals are extracted from the plants.

5. Rhizofiltration, in this method of phytoremediation plants are used to absorb, accumulate and concentrate metals from the contaminated surface water or ground water.

Heavy Metal Phytoremediation:

Plants called as hyperaccumulators are used for the extraction of heavy metal from the contaminants. These plants that is hyperaccumulators, when compared to the usual plants they take up almost 100 times more of heavy metal from the contaminated water or soil. Heavy metals are extracted from the soil and accumulate in the root, stem or leaves of plants. The plant is then harvested and disposed and the contaminated site is again planted with new plant until all the contaminants are extracted from the soil.

Some of the examples of phytoremediation:

1. Indian mustard Brassica juncea are used to extract the heavy metal lead from contaminated soil. After harvesting Brassica juncea average concentration of lead from all the crops is more than 1,000 ppm.

2. Thlaspi caerulescens accumulates upto 26,000 ppm of cadmium or zinc from the contaminated soil, while a normal plant accumulates around 100ppm of heavy metal.

3. Ipomea alpina accumulates around 12,000 ppm of copper from contaminated soil.

4. Haumaniastrum robertii accumulates around 10,200 ppm of cobalt from the contaminated soil surface.

5. Astragalus racemosus is used to accumulate 10,000 ppm of heavy metal selenium from the contaminated soil

6. Sebertia acuminata is used to extract heavy metal nickel from the contaminated soil

Advantages of Phytoremediation:

1. Phytoremediation is conducted at the site of contamination, that is in situ
2. Low cost when compared to other chemical peocedures
3. Transfer id faster than natural attenuation
4. Well suited for large fields or large contaminated sites
5. Fewer or very less water and air emission
6. Soils are in place and they can be used for cultivation after phytoremediation
7. Compatible with engineered technology
8. Phytoremediation is environment friendly method

About Author / Additional Info:


Search this site & forums
Share this article with friends:



Share with Facebook Share with Linkedin Share with Twitter Share with Pinterest Email this article

More Social Bookmarks (Digg etc..)


Comments on this article: (0 comments so far)

Comment By Comment

Leave a Comment   |   Article Views: 9871



Additional Articles:

•   Nanotoxicology : The Surprising Small Scale Threat.

•   Impact of Waste Management

•   Biosorptions - Toxic Waste Treatment by Microorganisms

•   Electronic Data Capture - An Essential Element in the Field of DM




Latest Articles in "Environmental-Biotechnology" category:
•   Advantages and Disadvantages of Biofuels

•   Biotechnology For a Clean Environment

•   Methods of Wastewater Treatment

•   Steps Involved in Nitrogen Cycle

•   Biotechnology and Environment Protection

•   Greenhouse Effect - Importance and Types

•   Biological Degradation of Xenobiotics

•   Phytoremediation - Greener Approach to Control Pollution

•   Impact of Waste Management

•   Waste Water Treatment Steps: Primary, Secondary and Tertiary Treatment

•   Bioremediation - A Weapon to Tackle Oil Spills

•   Phytoremediation - Use of green plants to remove pollutants

•   The History of Botany | Botanists in Philippines

•   Bioremediation by Cold Tolerant Microbes

•   Cold Adaptation by Microorganisms

•   Succession Stages of Xerosere

•   The Climax Concept - Theories and Categories

•   Succession Stages of Hydrosere

•   Bioextraction Mechanisms of Metals From Their Ores



Important Disclaimer: All articles on this website are for general information only and is not a professional or experts advice. We do not own any responsibility for correctness or authenticity of the information presented in this article, or any loss or injury resulting from it. We do not endorse these articles, we are neither affiliated with the authors of these articles nor responsible for their content. Please see our disclaimer section for complete terms.
Page copy protected against web site content infringement by Copyscape
Copyright © 2010 biotecharticles.com - Do not copy articles from this website.

ARTICLE CATEGORIES :
Agriculture Bioinformatics Applications Biotech Products Biotech Research
Biology Careers College/Edu DNA Environmental Biotech
Genetics Healthcare Industry News Issues Nanotechnology
Others Stem Cells Press Release Toxicology  


  |   Disclaimer/Privacy/TOS   |   Submission Guidelines   |   Contact Us