Production of Silk Fibroin Membrane for Heavy Metal Removal in Water

Abstract Thermodynamically driven salts and annealing processes developed the pure silk fibroin (SF) membranes from Bombyx mori cocoons. For more generation, the silk fibroin solution 5 wt% mixed the sodium chloride (NaCl) and polyethylene glycol (PEG). The top surface and cross-section of silk fibroin mixed with NaCl (SF/NaCl) showed pore in the surface membrane and hydrophilic property. The β-sheet content in the SF/NaCl membrane is higher than pure silk fibroin (SF) and the silk fibroin mixed with PEG (SF/PEG) membranes. Then cadmium (Cd), lead (Pb), and mercury (Hg) metals in water filtered pass through only SF/NaCl experimented. The pressure, pH, and temperature were effect by the flow rate efficiency of SF/NaCl membranes. The results showed that the highest % removal of Cd, Pb, and Hg were 45.36%, 61.43%, and 86.87%, respectively. The best condition of absorption capacity was 8.50, 6.42, and 41.14 mg/g for Cd, Pb, and Hg. As a natural biopolymer, SF/NaCl possibly apply for Hg removal for water treatment, its nontoxicity, excellent biocompatibility, and mechanical toughness.

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Applications of Nanoparticles in Heavy Metal Removal for Wastewater Treatment at Brahmani River

Journal of Computational and Theoretical Nanoscience ◽

10.1166/jctn.2020.9296 ◽

2020 ◽

Vol 17 (9) ◽

pp. 4666-4670

Author(s):

Himanshu Sekhar Rath ◽

Mira Das ◽

Smita Rath ◽

U. N. Dash ◽

Alakananda Tripathy

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Metal Removal ◽

Activated Carbons ◽

Low Cost ◽

Groundwater Resources ◽

Heavy Metal Removal ◽

Absorption Capacity ◽

Current Standard ◽

River Stretch

The goal of this research is to determine the current standard of water quality along the Brahmani River stretch in terms of physico-chemical parameters. The River Brahmani receives a substantial amount of industrial waste in the identified study area and is witness to a large amount of human and agricultural activities. Nowadays Ninety percent of Brahmani’s required water is secured with groundwater resources and it is essential to forecast pollutant content in those resources. Hence, this research aimed at using of nanoparticles such as Activated Carbons (ACs) for removal of heavy metal such as nickel and zinc in Brahmani river using the Langmuir approach. Adsorption seems to be the most widely used method for heavy metal recovery due to its low cost, easy installation and the presence of alternative adsorbents. In addition, the process of adsorption can also be made in use to recover heavy metal ions from wastewater. Despite these advantages, adsorption is hard to commercialize. Due to the strong absorption capacity, high number of pores and wide, common area, nanoparticles are treated as the effective method in removal of heavy metals in rivers. Comparative analysis shows that seventy-one percent of heavy metals can be removed using the nanotechnology model.

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Efficiency of SPIONs functionalized with polyethylene glycol bis(amine) for heavy metal removal

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2016.04.064 ◽

2016 ◽

Vol 414 ◽

pp. 32-37 ◽

Cited By ~ 20

Author(s):

Yongyuth Wanna ◽

Anon Chindaduang ◽

Gamolwan Tumcharern ◽

Darinee Phromyothin ◽

Supanit Porntheerapat ◽

...

Keyword(s):

Heavy Metal ◽

Polyethylene Glycol ◽

Metal Removal ◽

Heavy Metal Removal

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STUDY ON SYNTHESIS OF MnFe2O4/GNPs COMPOSITE AND APPLICATION ON HEAVY METAL REMOVAL

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/56/1a/12524 ◽

2018 ◽

Vol 56 (1A) ◽

pp. 204

Author(s):

Nguyen Duy Anh

Keyword(s):

Heavy Metal ◽

Metal Oxide ◽

Metal Removal ◽

Metal Oxide Nanoparticles ◽

Heavy Metal Removal ◽

Absorption Capacity ◽

Mixed Metal Oxide ◽

Oxide Nanoparticles ◽

Toxic Heavy Metal ◽

Mixed Metal

Nowadays, composite materials between mixed-metal oxides and graphene are widely studied due to their multiple applications on different fields. MnFe2O4 is a magnetic material which has the ability to absorb toxic heavy metal in water. Graphene nanoplatelets (GNPs) with about 10 layers, is one of type of graphene. GNPs was used as matrix for the fine distribution of metal oxide nanoparticles. Surface area for the absorption process can be increased. Composite was synthesized using solvothermal method, in which mixed-metal oxide nanoparticles were directly formed in-situ from precursor salts onto GNPs surface. Synthesized material was analyzed using XRD, SEM and EDX methods to determine its properties. Heavy metal absorption capacity was also studied and showed good results.

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