The results indicated that fluorine pollution strengthened the stability of soil colloid and increased the critical flocculationconcentration.
结果表明，氟污染使土壤黏粒的稳定性增强，土壤胶体的临界聚沉浓度增大；
2
The effect extent of increasing the critical flocculationconcentration is different among various soils, expressing that the effect on red soils is more remarkable than that on the paddy soil.
土壤中增加氟，对土壤胶体临界聚沉浓度增大的影响程度因土壤类型不同而不同，表现为红壤大于水稻土；
3
This kind of technique is an effective detecting means, which can be used to detect flocculation process of suspension with high concentration.