tailieunhanh - NATURAL ARSENIC IN GROUNDWATER: OCCURRENCE, REMEDIATION AND MANAGEMENT - CHAPTER 33

Sự hiện diện của các cấp cao của tự nhiên asen trong nước ngầm của Bangladesh, đã bị suy giảm nghiêm trọng các nỗ lực thập kỷ dài cung cấp nước sạch cho gần 98% dân số và đưa 35 triệu người, gần 1 / 4 tổng dân số â € " có nguy cơ. Để giải quyết vấn đề này, một dự án mang tên â € œArsenic trong tubewell (TW) nước và sức khỏe hậu quả trong Matlab Upazila huyện Chandpur (AsMat) - đang được thực hiện do ICDDR, B và BRAC. Trong nghiên cứu này. tất cả các TWS trong Matlab đã. | Natural Arsenic in Groundwater Occurrence Remediation and Management -Bundschuh Bhattacharya and Chandrasekharam eds 2005 Taylor Francis Group London ISBN 04 1536 700 X Sustainable safe water options in Bangladesh experiences from the Arsenic Project at Matlab AsMat Md. Jakariya Mizanur Rahman . Chowdhury Research and Evaluation Division BRAC Dhaka Bangladesh Mahfuzar Rahman Md. Yunus Abbas Bhiuya . Wahed Center for Health and Population Research International Centre for Diarrhoeal Disease Research Bangladesh ICDDR B Dhaka Bangladesh Prosun Bhattacharya Gunnar Jacks Groundwater Arsenic Research Group Department of Land and Water Resources Engineering Royal Institute ofTechnology KTH Stockholm Sweden Marie Vahter Division of Metals and Health Karolinska Institutet Stockholm Sweden Lars-Ảke Persson Department of Women s and Children s Health Uppsala University Uppsala Sweden ABSTRACT The presence of elevated levels of naturally occurring arsenic in groundwater of Bangladesh has severely impaired the decade long effort of providing safe water to nearly 98 of its population and putting an estimated 35 million people-nearly one fourth of the total population -at risk. In order to address this problem a project titled Arsenic in tubewell TW water and health consequences in Matlab Upazila of Chandpur district AsMat is being implemented jointly by ICDDR B and BRAC. During this study. all the TWs in Matlab have been assigned unique identification numbers with marked GPS coordinates depth and age. It is estimated that nearly 65 of the about 13 000 TWs in Matlab have As concentrations above the Bangladesh drinking water standard 50 gg L . In order to minimize arsenic exposure a work to provide various alternate safe drinking water options to the exposed population has been initiated. As of March 2004 about 1047 different alternate safe water options such as Pond Sand Filter PSF Rainwater Harvester RWH and different filters to remove arsenic as well as pathogenic .