Preparation of sustainable nanocomposite as new adsorbent for dyes removal

Metal nanoparticles fabricated by green chemistry using natural extracts: biosynthesis, mechanisms, and applications

“…The past decade has witnessed the vast development and involvement of nanomaterials in many different areas of research due to their unique optoelectronic and physicochemical properties. 1,2 Nanoparticles (NPs) are a particularly important class of nanomaterials with applications in diverse elds including electronics, 3,4 catalysis, 5 sensing, water treatment, 6,7 oil recovery, 8 corrosion inhibition, 9 and drug delivery. Although NPs are usually dened as particles with diameters in the range of 1-100 nm, 10 this term has been applied to particles with diameters of up to 500 nm in the context of biotechnology.…”

Use of fibroin polypeptide from silk processing waste as an effective biosorbent for heavy metal removal

“…Similar to a number of other studies on heavy metal sorption on bio-materials, [41][42][43] the Langmuir model appears to be adequate to describe the sorption isotherm, and monolayer adsorption is sometimes used to explain the maximum sorption capacity of the biosorbents [18,19] in view of complexation interactions between metal ions and the functional groups (eg, hydroxyl and secondary amine groups) of the biomacromolecules. [4,44] It is considered that when these active sorption sites are tied up with the metal ions, additional sorption of the metal ions to form multilayers will be difficult.…”

“…[14][15][16] Silk fibroin is a natural biopolymer that is potentially an economical adsorbent for the removal of heavy metals from water. [17,18] A great deal of work has been done on the use of fibroin to form bio-composites [19][20][21][22] with other suitable materials (eg, cellulose acetate, chitosan, nylon 6, and graphene oxide and titanate nanosheets), in the form of membranes and films, [23,24] porous foams, [25] hydrogels, [26] aerogels, [27] and nanofibers [28,29] for dye and heavy metal removal. The properties of the bio-composites are obviously affected by the intrinsic properties of fibroin, especially when fibroin is the major component in the composites.…”

Assembly of gelatin biopolymer to fibrous sepiolite clay for efficient dye removal from wastewater

“…The assembly of biopolymers to clay minerals giving rise because of their synergistic effect regarding both the mechanical and the absorption properties of these systems . Recently, several attempts have been made to composite the adsorbents with biopolymers, such as poly(vinyl alcohol), carrageenan, chitosan, alginate, cellulose, and silk fibroin which led to enhancement in their adsorption capacity. Gelatin (GE) is a natural biopolymer and has a long history of safe use in cosmetic, pharmaceutical and food industries .…”