EFFICACY AND CHEMICAL EFFECTS OF BASE TREATMENT TO FLOWING WATER SYSTEMS
作者:
W.Peter Saunders,
JamesE. Fraser,
期刊:
Lake and Reservoir Management
(Taylor Available online 1987)
卷期:
Volume 3,
issue 1
页码: 452-459
ISSN:1040-2381
年代: 1987
DOI:10.1080/07438148709354803
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Three techniques of stream liming were analyzed with respect to dissolution efficiency, ability to treat fluctuations in flow and effects on selected water quality parameters: a slurried-powder mechanical doser, a rotary drum system, and a limestone aggregate stream barrier. All achieved similar minimum levels of alkalinity and pH. The doses of calcium carbonate produced by both mechanical treatment methods were relatively unaffected by flow while the limestone barrier lost effectiveness at higher flows. Analysis of changes in concentrations of metals (particularly aluminum) indicated a complex interaction between base material addition and metals. The base material added by the slurried-powder doser appears to have contributed to an observed increase in total aluminum concentrations downstream of the doser. The limestone barrier appears to have acted as a sink for aluminum during low flows, subsequently releasing the metal during high flows. The treatment methods reviewed all appear capable of achieving water quality targets under specific conditions. Care must be taken, however, in selection of materials in order to produce desirable reductions in potentially toxic constituents.
点击下载:
PDF (699KB)
返 回