Comprehensive analysis of cationic dye removal from synthetic and industrial wastewater using a semi-natural curcumin grafted biochar/poly acrylic acid composite hydrogel

Abstract

Curcumin-engineered biochar is embedded into a cross-linked polyacrylic acid hydrogel matrix using in situ polymerization for developing a semi-natural adsorbent for the removal of cationic dye from an aqueous solution.

Efficient dye adsorption of mesoporous activated carbon from bamboo parenchyma cells by phosphoric acid activation

“…According to the above pore structure analysis results, PPAC-30C has a rich mesoporous structure, and many MB molecules enter the internal pores of PPAC-30C mainly through the pore filling effect under acidic conditions. 31,32 The competition between dye cations and protons for effective adsorption sites decreases with increasing pH. At simultaneously, the deprotonation of the hydroxyl and carboxyl functional groups released more adsorption sites, and electrostatic attraction between the negative charges on the activated carbon-surface and the dye cations was generated, facilitating the adsorption of MB.…”