Determination of Surface Area of Red Mud and BeringiteUsing Methylene Blue MethodEnglish Full Text

ZHANG GANGYA, LUO YONGMING and DENG XIHAIInstitute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China)

Abstract: The adsorption of methylene blue （MB） on three soil amendments, red mud from Hungary, red mudfrom UK and beringite from Belgium, was studied to determine the surface areas of the amendments usinga 0.005 mol L-1 NaCl solution and deionised water as background solutions. The surface areas determinedby the methylene blue method in the 0.005 mol L-1 NaCl solution were 3.357, 2.340 and 5.576 m2 g-1 forred mud （Hungary）, red mud （UK） and beringite, respectively slightly lower than those in the deionisedwater system. The largest surface area of beringite suggested that the MB could adsorb effectively on theinterlayer surface of illite. The effect of NaCl on the surface areas was relatively small and may therefore beignored. Both the 0.005 mol L-1 NaCl solution and deionised water could be used as a background solutionfor measurement of surface area of oxide-rich materials.

Keywords：

beringite; methylene; blue; red; surface area;

Series：
(D) Agriculture
Subject：
Fundamental Science of Agriculture; Agronomy
Classification Code：
S153

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Determination of Surface Area of Red Mud and BeringiteUsing Methylene Blue MethodEnglish Full Text

ZHANG GANGYA, LUO YONGMING and DENG XIHAIInstitute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China)

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