Cadmium is one of the most harmful five heavy metals, so it is needed to find an economical adsorbent to treat cadmium-containing wastewater. The distribution area of red soil in China is more than 2 million square kilometers, and it has been proved to be a potential adsorbent for removing Cd(II). The particle size of the red soil used in the test is mainly between 10 ~200 μm, the surface area was 16.41 m2/g. The maximum adsorption capacity of red soil to Cd(II) was about 2.10 mg/g. Study found that the initial solution pH, ionic strength, coe...
