Adsorption of Acid Blue 193 from aqueous solutions onto Na–bentonite and DTMA–bentonite

Paper-like composites of cellulose acetate–organo-montmorillonite for removal of hazardous anionic dye in water

“…At pH = 1, the adsorption capacity of the CA/OMMT 60% composites reached the maximum of 95.1 mg g À1 , whereas at pH = 9, the adsorption capacity gave the minimum of 61.7 mg g À1 . Such a gap of 33.4 mg g À1 was attributed to the strong electrostatic interaction between the [C 16 H 33 (CH 3 ) 3 N] + -in OMMT and dye anions and the ionization of azonium group took priority at low pH [43]. When the pH value of the dye solution was raised from 1 to 10, the ionization of naphtholic group made the negative charge on the ASG in the solution increase.…”

Applications on agricultural and forest waste adsorbents for the removal of lead (II) from contaminated waters

“…ions. Adsorbent materials derived from low-cost agricultural wastes can be used for the effective removal and recovery of heavy metal ions from wastewater (Holan and Volesky 1994;Volesky and Holan 1995;Ake et al 2001;Ahalya et al 2003;Ö zcan et al 2004;Tunali et al 2006). The basic components of the agricultural waste biomass include hemicelluloses, lignin, extractives, lipids, proteins, simple sugars, water hydrocarbons and starchcontaining variety of functional groups (Bailey et al 1999).…”

Adsorption and Photochemical Behaviour of the Herbicide Monuron on Clay Surfaces

“…It is apparent that adsorption is independent on the pH of the solution. The pKa of monuron is too weak, it is about -0.082 (Ozcan et al, 2004), and does not have ionisable functions. Therefore the pH does not influence its sorption to the clays.…”