目的：我们采用先进的自动控制技术、膜分离技术、精滤、双级反渗透和紫外消毒系统研制出全自动封闭式医用纯水制备系统。
Objective We adopted techniques of the modern membrane separation and exact filtration and the technology of reserve osmosis solves difficulty of medicinal water.
结果表明，BPA在纯水体系中直接光解很慢，但在碱性体系和硝酸根溶液中光解迅速，符合一级动力学反应。
BPA direct photodegradation was very slow in pure aquatic system; but was rapid in alkaline system and nitrate solutions according with first grade dynamic equation.
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