Biosorption of Methyl violet onto palm kernel fiber: Diffusion studies and multistage process design to minimize biosorbent mass and contact time

Kinetic, isotherm and thermodynamic studies of amaranth dye biosorption from aqueous solution onto water hyacinth leaves

“…Furthermore, at all initial AD concentrations and temperatures assayed, the values of DG # were positive (58.58e64.8 kJ mol À1 ), indicating that the AD biosorption reaction is not spontaneous and therefore requires some energy from an external source to take place (Do gan et al, 2009;Alkan et al, 2008). The biosorption processes of methyl violet onto palm kernel fiber (Ofomaja et al, 2011), maxilon blue 5G onto sepiolite (Alkan et al, 2008) and methylene blue onto hazelnut shell (Do gan et al, 2009) were also found to be endothermic (DH # > 0), non-spontaneous (DG # > 0) and occur without changes in the structure of the sorbents (DS # < 0).…”

Biosorption of cationic dyes on breadfruit (Artocarpus altilis) peel and core

“…2), where the surface charge density of the core is more negative at the pH of investigation. Further, the q max values obtained for the removal of MB and MV by breadfruit waste are higher as compared to those observed for palm kernel fibre and sunflower seed hull (Namasivayam and Sureshkumar 2008;Ofomaja et al 2011;Hameed 2008) (Table 3), indicating the superior sorption ability of breadfruit waste for cationic dyes without any carbonization, which is comparable to activated carbon of natural substances. This is further supported by high q max values reported for sorption of MB on jackfruit peel, another Artocarpus variety (Hameed, 2009), and for sorption of crystal violet on breadfruit skin (Lim et al 2015).…”

Optimization of the use of a biosorbent to remove heavy metals: Regeneration and reuse of exhausted biosorbent

“…It is an effective technology widely studied over recent years, because of its wide range of target pollutants, high sorption capacity, excellent performance, ecofriendly nature and low operating cost [19][20][21]. In recent years, the characterization and application of different agricultural waste from olive cultivar have been studied to use them as biosorbent.…”