Hi,
Could anyone list the MAIN points in summarising the geological and chemical processes causing arsenic contamination in Bangladesh groundwater...
I know a little about aquifiers and stuff but am struggling with the MAIN points. I have looked at the various websites...but if someone can identify the main points that should see me thru.....
Thanks :-)
Here is an excellent study.
http://64.233.169.104/search?q=cache:uXTfazDO1qQJ:www.eng-consult.com/pub/ArsenicIEB.pdf+Causes+of+geological+and+chemical+arsenic+contamination+in+Bangladesh+groundwater&hl=en&ct=clnk&cd=1&gl=us&ie=UTF-8
Gurublue...
Thank you very much !!!!
You are entirely welcome!
Of course! Here are the main points summarizing the geological and chemical processes causing arsenic contamination in Bangladesh groundwater:
1. Geological Factors: The primary geological factor leading to arsenic contamination in Bangladesh groundwater is the presence of arsenic-rich sediments, such as iron oxides and clay minerals, in the region's aquifers. These sediments contain naturally occurring arsenic.
2. Redox Reactions: In areas where the groundwater has a low oxygen content (reducing conditions), chemical reactions occur that release arsenic into the groundwater. This process is known as redox reactions. The release of arsenic is influenced by various factors, such as the presence of iron and sulfur compounds, the pH level, and the availability of organic matter.
3. Hydrological Factors: The hydrological characteristics of the region also play a significant role in arsenic contamination. Bangladesh is situated in a deltaic plain, where rivers deposit sediments rich in arsenic over time. These sediments gradually infiltrate into the aquifers, leading to the contamination of groundwater.
4. Human Activities: Human activities, such as excessive groundwater extraction, can further exacerbate arsenic contamination. Over-pumping of groundwater causes the migration of arsenic-contaminated water from deeper aquifers towards shallower ones, where it is used for drinking and irrigation purposes.
To find this information, I recommend consulting reliable sources such as scientific journals, government reports, or scholarly articles. These sources will provide you with in-depth knowledge and scientific explanations of the geological and chemical processes involved in arsenic contamination in Bangladesh groundwater.