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环境科学技术 活性 Simultaneously,Cu is a heavy metal element which is relatively easy to exceed standard,so before the sludge using in agriculture we must take certain measures to reduce excessive levels of heavy metals o its activeness. 同时Cu元素也是一种比较容易超标的重金属元素,污泥在农用之前必须采取一定措施使超标重金属的含量降低或者使其活性降低。
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