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根据粘土表面改性对其絮凝作用影响的理论模型，提出在粘土中引入 ＭＭＨ（混合 金属层状氢氧化物正电胶体）的改性方法；考察了ＭＭＨ浓度及ＰＨ值对絮凝作用的影响。 结果表明，粘土中引入ＭＭＨ后，显著提高了对赤潮异弯藻（Ｈｅｔｅｒｏｓｉｇｍａ ａｋａｓｈｉｗｏ）和新月菱形 藻（Ｎｉｔｚｃｈｉａ ｃｌｏｓｔｅｒｉｕｍ）的去除效率，二者的适宜配比为ＭＭＨ：粘土＝０．１ｇ：１ｇ。在此基础上， 进一步研究了ＭＭＨ促进粘土絮凝作用的机制，发现其去除赤潮生物的效率与改性后表面 电性呈正相关，相关系数Ｒ＝０．９３，与以前提出的理论模型一致。
According to the theoretical model of the effect of clay surface modification on its flocculation, a modification method of introducing MMH (mixed metal layered hydroxide positive colloid) into clay was proposed; the effect of MMH concentration and PH value on flocculation was investigated. The results showed that MMH was added to clay to significantly improve the removal efficiency of Heterosigma akashiwo and Nitzchia closterium. The suitable ratio of MMH to clay was 0.1g: 1g . On this basis, the mechanism of MMH promoting clay flocculation was further studied. It was found that the efficiency of removing red tide organisms was positively correlated with the surface electrical properties after modification. The correlation coefficient R = 0.93 was consistent with the theoretical model proposed previously.