tailieunhanh - In Situ Treatment Technology - Chapter 11

Thấm xử lý các rào cản Peter L. Palmer NỘI DUNG Giới thiệu khái niệm Thiết kế cài đặt phương pháp liên tục đào rãnh khai quật và đất thép Caissons san lấp trộn thủy lực bẻ gãy và thấm Infilling quá trình điều trị thấm Barrier chuyển đổi quá trình vật lý diệt Sửa đổi pH hoặc Eh Lượng mưa Điều kiện của kim loại chất gây ô nhiễm Loại bỏ qua Sorption hoặc Ion Exchange suy thoái sinh học Thiết kế cân nhắc nghiên cứu điển hình phản ứng bức tường nền Kênh và nghiên cứu mô hình hóa cổng. | Palmer Peter L. Permeable Treatment Barriers In Situ Treatment Technology Boca Raton CRC Press LLC 2001 CHAPTER 11 Permeable Treatment Barriers Peter L. Palmer CONTENTS Introduction Design Concepts Installation Methodologies Continuous Trenching Excavation and Backfilling Steel Caissons Soil Mixing Hydraulic Fracturing and Permeation Infilling Permeable Treatment Barrier Processes Transformation Processes Physical Removal Modify pH or Eh Conditions Precipitation of Metals Contaminant Removal via Sorption or Ion Exchange Biological Degradation Design Considerations Case Study Reactive Wall Design Background Funnel and Gate Modeling Study Gradient Control Underflow of Barrier Gate Design System Performance References 2001 CRC Press LLC INTRODUCTION Permeable treatment barriers are an innovative technology that show a lot of promise for remediating shallow groundwater plumes. In principle a permeable treatment barrier also referred to as permeable reactive barriers containing the appropriate treatment material is placed across the path of a contaminant plume. As contaminated groundwater moves through the barrier the contaminants are removed or degraded allowing uncontaminated water to continue its natural course through the flow system. Much of the early work on permeable treatment barriers has been performed by the Waterloo Center for Groundwater Research University of Waterloo. Their work focused primarily on the use of a reactive material zero-valent granular iron to degrade halogenated organic compounds in groundwater. Although much of the focus on permeable treatment barriers today is on the application of zero-valent iron some of the concepts developed have been applied to permeable treatment barriers that use media other than zero-valent iron to remediate impacted groundwater. A summary of early developments using zero-valent iron as permeable treatment barriers has been compiled by Gillham and Burris 1994 . More recent developments including application of .