利用废弃物和天然产物开发的混凝剂

对近几年利用废弃物和天然产物开发的混凝剂的研究与应用进行了分析和概括。结果表明，以硫铁矿渣、粉煤灰等为原料制得的混凝剂价廉，处理效果优良；天然产物改性制备的混凝剂无毒或低毒，可生物降解，混凝效果显著。

Study on the Application of Coagulant using Castoff and Crude

With the increasing aggravation of the environmental pollution and the higher demand of the water quality, it has been becoming an important and urgent research subject to develop a new and highly efficient coagulant. Based on the related information domestic and abroad, the study on the recent application of coagulant using castoff and crude are analyzed and summarized in this article. It is economic to use castoff like coal flyash for preparation of coagulant with low cost and benign properties, while modification of natural products is proven to be effective to lower their toxicity and enable them bio-degradable.