Inorder to promote the efficiency of clay, We improve it with QACs, and ourresearchs indicate that the QAC-clay has good effect: With 1 gIL 1 .5CECQAC-clay, the removing rate rises to 100% from the crude clay 40% in 6h.

• 5CEC量的季铵盐改性得到的有机土，在1g/L用量下，对赤潮异弯藻去除率从原土的40%25提高到100%25。