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Limited information is available on the changes of surface chemical properties of tropical soils with time during the pedogenesis. Soil samples of three profiles derived from basalts of 10, 1330 and 2290kilo annum (ka) in age were collected from adjacent locations in a tropical region of Hainan Province, China. The changes in soil surface chemical properties and the mineralogy of the soil clay fraction...
Adsorption and desorption of Cu(II) and Cd(II) in the soils derived from basalts aged 10, 1,330, and 2,290 kiloyears (ky) in the tropical regions of Hainan, China were investigated. X-ray diffraction analysis indicated that the clay minerals were dominated by smectite, halloysite, and kaolinite mixed with montmorillonite in the soil derived from 10 ky-basalt and by kaolinite, halloysite, and gibbsite...
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