Adsorption of Methyl Orange, Pb²⁺ and Cd²⁺ from Aqueous Solution by Composites of Lignocellulose‐Montmorillonite Modified with Methacryloxypropyl Trimethoxysilane

Abstract

A composite material based on lignocellulose and montmorillonite clay (MPSgLig‐NaMMT) was prepared and evaluated as an adsorbent for the removal of pollutants (dyes and heavy metals) from aqueous solution. The lignocellulose‐montmorillonite composite was prepared by in situ intercalative polymerisation, using methacryloxypropyl trimethoxysilane (MPS) as a coupling agent. The composite material was characterised by FTIR, TGA and SAXS. The lignocellulose‐montmorillonite composite was assessed as an adsorbent for methyl orange dye from aqueous solution. The composite material showed enhanced adsorption of methyl orange (MetO) compared with the NaMMT or lignocellulose separately. Competitive adsorption studies were carried out from binary mixtures of MetO with Cd2+ or Pb2+ in aqueous solution. The adsorption process of MetO onto the composite material was found to follow the Freundlich adsorption model. The adsorption of methyl orange from binary mixtures, were found to follow both the pseudo first‐order and pseudo second‐order models.

Evaluation of Toluene Adsorption by Porous Resins: Batch and Continuous Flow Studies

“…www.advancedsciencenews.com www.ms-journal.de adsorptive capacity of a material is a function of its surface area along with other factors, such as pore size and volume, particle size and adsorbate-adsorbent interaction, the last of which involves, for example, the material's polarity, hydrophobicity and crosslinking degree. [29][30][31] The toluene adsorption efficiencies of the resins DVB and MMA-DVB (Figure 1), starting at a mass of 0.3 g, were 94 and 88%, respectively, very close to the maximum efficiency value. Although DVB has surface area eight times larger than MMA-DVB and the aromatic ring of toluene enables π-π interactions with DVB, leading to greater adsorption capacity.…”

“…This study enabled estimating the minimum quantity of adsorbents necessary to reach maximum adsorption. The adsorptive capacity of a material is a function of its surface area along with other factors, such as pore size and volume, particle size and adsorbate‐adsorbent interaction, the last of which involves, for example, the material's polarity, hydrophobicity and crosslinking degree …”

Radioactive Cobalt(II) Removal from Aqueous Solutions Using a Reusable Nanocomposite: Kinetic, Isotherms, and Mechanistic Study

“…Bunhu and Tichagwa [ 23 ] prepared a lignocellulose–montmorillonite composite, and investigated its adsorption of methyl orange, lead (Pb 2+ ), and cadmium (Cd 2+ ). Polymer/clay nanocomposites have become a promising alternative for the expansion of industrial and economic activities and the satisfaction of increasingly stringent environmental conditions [ 24 , 25 , 26 , 27 , 28 ].…”

How Does Competition between Anionic Pollutants Affect Adsorption onto Mg–Al Layered Double Hydroxide? Three Competition Schemes

“…In several papers that have been published regarding the retention of acid or basic dyes by various inorganic or carbonaceous solid substrates from multisolute solutions, − the competition is chiefly viewed between the negatively or positively charged dye and inorganic species. The retention performance toward a given dye in the mixed dye solutions was generally found to be decreased as compared to the single-solute systems. − Furthermore, the impact of competition on individual sorption quantities was demonstrated to depend on both the individual affinity of each dye for the solid surface and the composition of the aqueous phase.…”