Chalk Point Cooling Tower Project:Effects of Simulated Saline Cooling Tower Drift on Woody Species.

摘要

Cooling towers of power plants are used to dissipate waste heat into the atmosphere. If saline water is used for cooling, a saline aerosol known as drift is released into the atmosphere. Drift effects on vegetation are not well known. To simulate drift for a field study,cooling tower basin water was sprayed thirty separate times during a 46-day period in 1975on Virginia pine (Pinus virginiana),flowering dogwood (Cornus florida),tulip tree (Liriodendron tulipfera),and California privet (Ligustrum ovalifolium),Norway spruce (Picea abies),and white ash (Fraxinus americana) were added in 1976and all trees were sprayed 43times during a 59-day period. Only dogwood leaves showed significant injury. Absence of injury on other species was probably due to the ability of their leaves to exclude,or reduce absorption of,toxic concentrations of the ions supplied.