Attenuation of methylene blue dye during riverbank filtration through sandy aquifers

作者：Mishra Shrinishtha^*; Kumar Pradeep

来源：Water and Environment Journal, 2015, 29(4): 507-514.

DOI：10.1111/wej.12123

• adsorption
• isotherms
• kinetics
• methylene blue
• retardation factor
• river bank filtration

Although several studies have focused on the removal of organics and pathogens during riverbank filtration (RBF), no study has been carried out on the attenuation of dyes during RBF. In the present work, removal of methylene blue (MB) through aquifer materials collected from five RBF sites in India has been investigated. Brunauer Emmet Teller (BET) surface areas of the aquifer materials were 1.2-6.5 m(2)/g. Adsorption followed the pseudo-second-order kinetics and Langmuir isotherm, suggesting monolayer adsorption. Column results showed saturation capacity of 0.467-1.234mgMB/g for different aquifer materials. Retardation factors for MB were found to be very high ranging from 430 to 987, due to its high hydrophobicity (octanol/water partition coefficient55.85). Results showed that BET surface area or the roughness played a very important role in the retardation of MB. Results suggest that the breakthrough of MB in a RBF well in sandy aquifers will take several years.

• 出版日期2015-12