Arsenic Contamination of Groundwater' How to solve this problem in Vietnam

1
Arsenic Contamination of Groundwater. How to
solve this problem in Vietnam


2
Main Contents

• Introduction an overview of Arsenic
  contamination of groundwater
• Reason for choosing this topic
• Research goals
• Research Contents

3
Some characteristics of As

• What is Arsenic?
• Arsenic is a semi-metal, a member of the nitrogen
  family
• occurs in the earths crust-rock, soil, all
  natural sources of exposure
• combine with other elements to form inorganic and
  organic arsenicals
• inorganic derivatives are regarded as more toxic
  than the organic forms
• food contains both inorganic and organic
  arsenicals, primarily inorganic forms are present
  in water

4
An overview of arsenic contamination of
groundwater

• In the world
• Many projects, surveys undertaken
• - assess the scale of the groundwater arsenic
  problem
• - increase our understanding of the origins and
  behaviour of arsenic
• a number of researches, studies and other
  interventions have been conducted for more than a
  decade in South and East Asian countries

5
An overview

• In the world
• A number of patients were identified during
  screening in arsenic affected countries,
  particularly in Bangladesh
• the negative impact of arsenic ingestion have
  been documented for the last 200 years
• millions of people are at risk from arsenic
  induced diseases.

6
An overview

• A project funded by UK-DFID was undertaken
  between 1992 and 1995 in Ashanti Region in Ghana
  -a centre of major gold-mining activity
• Collecting groundwater samples
• Determining the concentration of arsen

7
In Vietnam

• In the years 1999 and 2000 conducted a
  comprehensive survey on arsenic in ground and
  drinking water of the city Hanoi and the adjacent
  rural districts
• average arsenic concentration of 159 µg/L

8
In Vietnam

• In a highly affected rural area, the groundwater
  used directly as drinking water had an average
  concentration of 430 µg/L arsenic

9
Arsenic removal Technology

• 1.Activated alumina filters2.Anion
  exchange3.Distillation4.Reverse
  Osmosis5.Nanofiltration6. Iron Oxide Filters

10
Reason for selecting this field

• Arsenic contamination of Groundwater is a popular
  problem
• Having serious influences on human health
• Not yet clearly study
• Others

11
Research Goals

• Solve the problem of As contamination of
  groundwater and its affection
• Improve the groundwater quanlity in vietnam
• Supply fresh water for livings
• Protect human health

12
Research contents

• Determine the resource of As contamination
• Select suitable and affordable Arsenic removal
  Technologies
• Apply in the area with large number of people
  affected by As contamination

13
thankyou for your attention