DOI: 10.36347/sjet

Pages: 397-401

The problem of environmental geotechnical engineering is the important problem that relates to the safety and the sustainable development of the geotechnical structure. This paper, studied the adsorption characteristics and pH of arsenic in different size of laterite particles. The test results show that the adsorption trend of arsenic by different particle size aggregates is consistent with that of the change. The isothermal adsorption process of arsenic in each particle of the particle was fitted by Langmuir equation. The effect of pH on the adsorption of arsenic in laterite was greatly. The adsorption capacity of arsenic decreased with the increase of pH value. The pH effect the greatest impact on the four types of laterite in class A, the other three types of laterite effect is almost the same, indicating that particle size range for the laterite in the middle reaches of the 0-0.005mm high off the state of iron oxide content, and pH value has a direct impact on the free ferric oxide existing forms and characteristics, and ultimately effect of arsenic ion adsorption capacity of laterite particles.