scholarly journals Recent advances in dye and metal ion removal using efficient adsorbents and novel nano-based materials: an overview

RSC Advances ◽  
2021 ◽  
Vol 11 (58) ◽  
pp. 36528-36553
Author(s):  
Ahmad K. Badawi ◽  
M. Abd Elkodous ◽  
Gomaa A. M. Ali
Keyword(s):  
Water Treatment ◽  
Metal Ions ◽  
Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Recent Advances ◽  
Metal Ions Removal

Various materials including waste precursors used as adsorbents for water treatment (dyes and metal ions removal).

scholarly journals Removal of barium, cobalt, strontium and zinc from solution by natural and synthetic allophane adsorbents

2018 ◽  
Author(s):  
Andre Baldermann ◽  
Andrea Cäcilia Grießbacher ◽  
Claudia Baldermann ◽  
Bettina Purgstaller ◽  
Ilse Letofsky-Papst ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Physical Adsorption ◽  
Ion Concentration ◽  
Pseudo First Order Reaction ◽  
Uptake Mechanism ◽  
Nano Structure ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Transmission Electron

The capacity and the mechanism of the adsorption of aqueous barium (Ba), cobalt (Co), strontium (Sr) and zinc (Zn) by Ecuadorian (NatAllo) and synthetic (SynAllo-1 and SynAllo-2) allophanes were studied as a function of contact time, pH and metal ion concentration using kinetic and equilibrium experiments. The mineralogy, nano-structure and chemical composition of the allophanes were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and specific surface area analyses. The evolution of adsorption fitted to a pseudo-first-order reaction kinetics, where equilibrium between aqueous metal ions and allophane was reached within < 10 min. The metal ion removal efficiencies varied from 0.7 to 99.7 % at pH 4.0 to 8.5. At equilibrium, the adsorption behavior is better described by the Langmuir model than by the Dubinin-Radushkevich model, yielding sorption capacities of 10.6, 17.2 and 38.6 mg/g for Ba^(2+), 12.4, 19.3 and 29.0 mg/g for HCoO_2^-, 7.2, 15.9 and 34.4 mg/g for Sr^(2+) and 20.9, 26.9 and 36.9 mg/g for Zn^(2+), respectively, by NatAllo, SynAllo-2 and SynAllo-1. The uptake mechanism is based on a physical adsorption process. Allophane holds great potential to remove aqueous metal ions and could be used instead of zeolites, montmorillonite, carbonates and phosphates for wastewater treatment.

scholarly journals Heavy Metal Removal from Aqueous Solution Using Biosurfactants Produced by Pseudomonas aeruginosa with Corn Oil as Substrate

2018 ◽  
Vol 18 (3) ◽  
pp. 472
Author(s):  
Venty Suryanti ◽  
Sri Hastuti ◽  
Tutik Dwi Wahyuningsih ◽  
Mudasir Mudasir ◽  
Dian Kresnadipayana ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Metal Removal ◽  
Corn Oil ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Removal Capacity

The batch removal of Cu(II), Cd(II) and Pb(II) from individual heavy metal ion aqueous synthetic solution using biosurfactants produced by Pseudomonas aeruginosa with corn oil as substrate was investigated. The metal ion removal process of crude preparation biosurfactants (CPB) was established to be dependent on the initial pH and contact time. The optimum metal removal was observed at pH 6.0 of the initial metal solution and 10 min of contact time. The affinity sequence for metal ion removal was Pb(II)>Cd(II)>Cu(II). The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from single metal ions solution were 0.169, 0.276 and 0.323 mg/g, respectively. The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from multi metal ions solution were 0.064, 0.215 and 0.275 mg/g, respectively. The removal capacity of individual metal ion was diminished by the presence of other metal ions in multi metal ions from synthetic aqueous solution. The removal capacity value of biosurfactant for Cu(II), Cd(II) and Pb(II) from silver industry wastewater were 0.027, 0.055 and 0.291 mg/g, respectively. The results indicated that biosurfactants have potential to be used in the remediation of heavy metals in industrial wastewater.

Effect of Different Chemical and Physical Characteristic Having Lignocellulosic Fibers on Heavy Metal Ion Removal from Auqueous Solution

2008 ◽  
Vol 569 ◽  
pp. 285-288 ◽  
Author(s):  
Hyun Jong Lee ◽  
Beom Goo Lee ◽  
Dae Yong Shin ◽  
Heon Park
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Lignocellulosic Fibers ◽  
Heavy Metal Ion Removal ◽  
Kenaf Bast

In this study lignocellulosic fibers, such as kenaf bast, kenaf core, sugar cane bagasse, cotton, coconut coir, and spruce, which are environment friendly natural materials, were tested for their ability to remove copper, nickel and zinc ions from aqueous solutions. The fibers were analyzed for Klason lignin content, water sorption capacity and dry volume. The fiber with the highest level of heavy metal removal in the separate and mixed solution was kenaf bast.. In the mixed solution kenaf bast, sugar cane bagasse and cotton removed more copper and nickel ion than in the separate solution, and the amounts of removed heavy metal ions were changed in some lignocellulosic fibers, compared to those of the separate solution. In the mixed solution heavy metal ions may compete with one another for sorption sites on the surface of lignocellusic fiber. In kenaf bast to remove heavy metal ions most, Klason lignin content was the second lowest, and water sorption and dry volume were the lowest in all tested lignocellulosic fibers. It showed that removal of heavy metal ions does not correlate with any chemical and physical factors, but may be affected by the cell wall structure of lignocellulosic fibers and how many free phenolic groups in lignin, which are considered as the heavy metal ion binding site, are exposed on the surface of fibers. Cotton, with about 1% Klason lignin, was very low in heavy metal ion removal, while all other fibers containing greater than about 10% lignin did remove heavy metal ions. It showed that even the lignin content of lignocellulosic fibers does not correlate with heavy metal ion removal but lignin does play a role in heavy metal ion removal.

scholarly journals Metal ion removal using waste byssus from aquaculture

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Devis Montroni ◽  
Giorgia Giusti ◽  
Andrea Simoni ◽  
Genny Cau ◽  
Claudio Ciavatta ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
High Efficiency ◽  
Water Remediation ◽  
Isotherm Models ◽  
Metal Ion Removal ◽  
Chemical Systems ◽  
Ion Removal ◽  
Adsorption Isotherm Models ◽  
Ideal Solutions

AbstractByssus is a thread-like seafood waste that has a natural high efficiency in anchoring many metal ions thanks to its richness of diverse functional groups. It also has structural stability in extreme chemical, physical and mechanical conditions. The combination of these properties, absent in other waste materials, has novelty suggested its use as matrix for water remediation. Thus, pristine byssus, upon de-metalation, was studied to remove metal ions from ideal solutions at pH 4 and 7, as model chemical systems of industrial and environmental polluted waters, respectively. The byssus matrix’s uptake of metal ions was determined by ICP-OES and its surface microstructure investigated by SEM. The results showed that the byssus matrix excellently uptakes metal ions slightly reorganizing its surface micro-structure. As example of its efficiency: 50 mg of byssus absorbed 21.7 mg·g−1 of Cd2+ from a 10 mM solution at pH 7. The adsorption isotherm models of Freundlich and Langmuir were mainly used to describe the system at pH 7 and pH 4, respectively. In conclusion, we showed that the byssus, a waste material that is an environmental issue, has the potential to purify polluted industrial and environmental waters from metal ions.

scholarly journals Selective Removal of Toxic Ions from Water/Wastewater: Using a Novel Surfactant

Substantia ◽  
2021 ◽  
pp. 79-88
Author(s):  
Mohammad Ziaee ◽  
Mojtaba Taseidifar ◽  
Richard M. Pashley ◽  
Barry W. Ninham
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Heavy Metal Ions ◽  
Toxic Heavy Metal ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Advantages And Disadvantages ◽  
Heavy Metal Ion Removal ◽  
Green Surfactant

Pollution of drinking water by toxic heavy-metal ions is a matter of concern worldwide. These ions occur naturally, and also from environmental spills, radioactive wastes and other industrial waste. Arsenic and lead are typical examples. A novel green surfactant, purpose designed, and environmentally friendly is shown to be extremely effective and specific for heavy metal ion removal. This is a considerable step forward on previous technologies. Surfactants have been used universally to remove organic and inorganic contaminants from water. But little selectivity has been achieved. After usage, the residual surfactants are discharged into surface waters or sewage systems.  This causes environmental pollution. In this review, three surfactants from different classes (novel green surfactant, synthetic chemical surfactant and biosurfactant) are compared in terms of their efficiency in flotation, removal of different heavy-metal ions, biodegradability, and toxicity level, including their advantages and disadvantages.

scholarly journals Isothermal titration microcalorimetry to determine the thermodynamics of metal ion removal by magnetic nanoparticle sorbents

2016 ◽  
Vol 3 (5) ◽  
pp. 1206-1214 ◽  
Author(s):  
Yuxiong Huang ◽  
Arturo A. Keller
Keyword(s):  
Magnetic Nanoparticles ◽  
Metal Ions ◽  
Thermodynamic Parameters ◽  
Metal Ion ◽  
Magnetic Nanoparticle ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Isothermal Titration Microcalorimetry ◽  
Titration Microcalorimetry

Applying ITC to determine key thermodynamic parameters needed to model the sorption of metal ions by magnetic nanoparticles sorbents.

scholarly journals Biosorptive Removal of Cadmium(II) and Copper(II) Using Microwave-Assisted Thiourea-Modified Sorghum bicolor Agrowaste

2020 ◽  
Vol 2020 ◽  
pp. 1-11 ◽  
Author(s):  
Muhammad Salman ◽  
Rabia Rehman ◽  
Umar Farooq ◽  
Anum Tahir ◽  
Liviu Mitu
Keyword(s):  
Metal Ions ◽  
Sorghum Bicolor ◽  
Metal Ion ◽  
Toxic Metal ◽  
Order Kinetic ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Removal Capacity ◽  
Biosorption Process ◽  
Ft Ir

Sorghum bicolor (S.B.) is used in this work for preparing chemically modified adsorbent for toxic metal ions, i.e., cadmium(II) and copper(II). Thiourea is selected for chemical modification of this plant waste by microwave solid fusion methodology, so that its chelating ability for metal ions can be enhanced in both acidic and basic conditions, in a cheaper and quicker way. Characterization was carried out by different physiochemical means using FT-IR, SEM, etc. An increase in pHpzc value was observed in TSB, which is confirmed by FT-IR analysis. The effect of biosorption process parameters was also studied and found that maximum removal of these toxic ions occurred in slightly acidic pH (5-6) conditions, following pseudo-second-order kinetic model. Boyd plots indicated that film dispersion mode was the rate-determining step. Langmuir model indicated that the maximum metal ion removal capacity of TSB was 17.241 mg/g and 15.151 mg/g for cadmium(II) and copper(II) ions. So, TSB can be used on a larger scale for toxic metal ion removal by Sorghum bicolor waste in a cleaner way.

scholarly journals Surface Modification of Polypropylene Membrane Using Biopolymers with Potential Applications for Metal Ion Removal

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Omar Alberto Hernández-Aguirre ◽  
Alejandra Núñez-Pineda ◽  
Melina Tapia-Tapia ◽  
Rosa María Gómez Espinosa
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Potato Starch ◽  
Membrane Surface ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Polypropylene Membrane ◽  
Grafting Reaction ◽  
Potential Applications ◽  
Ft Ir

This work aims to present the modification of polypropylene (PP) membranes using three different biopolymers, chitosan (CHI), potato starch (PS), and cellulose (CEL), in order to obtain three new materials. The modified membranes may be degraded easier than polypropylene ones and could be used as selective membranes for metal ions removal, among other applications. For this purpose, the UV energy induced graft copolymerization reaction among polypropylene membrane, acrylic acid, benzophenone (as photoinitiator), and the biopolymer (CHI, PS, or CEL) was conducted. The results of FT-IR-ATR, XRD, TGA, DSC, SEM, BET, and AFM analyses and mechanical properties clearly indicate the successful modification of the membrane surface. The change of surface wettability was monitored by contact angle. The grafting reaction depends on natural polymer, reaction time, and concentration. In order to prove the potential application of the modified membranes, a preliminary study of sorption of metal ion was carried out. For this purpose, the PP-CHI membrane was chosen because of the high hydrophilicity, proportionate to -OH and NH2; these groups could act as ligands of metal ions, provoking the interaction between PP-CHI and M+ (PP-CHI-M+) and therefore the metal ion removal from water.

Enhanced Adsorption Properties of Poly(2-Acrylamido-2-Methyl-1-Propansulfonic Acid)/Silica Composite Materials for Heavy Metal Ion Removal

2012 ◽  
Vol 164 ◽  
pp. 154-157
Author(s):  
Jing Jing Wang ◽  
Xian Ning Li
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Metal Ion ◽  
Silica Content ◽  
Metal Ion Removal ◽  
Composite Hydrogels ◽  
Ion Removal ◽  
Silica Composite ◽  
Heavy Metal Ion Removal ◽  
Enhanced Adsorption

Poly(2-acrylamido-2-methyl-1-propansulfonic acid)(PAMPS)/silica composite hydrogels have been prepared by in situ free-radical polymerization. The composite hydrogels were used to remove heavy metal ions from aqueous solution under the non-competitive condition. The results showed that the adsorption capacity of the hydrogels increased with the pH values and silica content in the formulation. Furthermore, the synergistic complexation of metal ions was found in the adsorption studies. Regeneration studies suggested that metal rebinding capacity of the hydrogels did not change significantly through repeated applications compared with the first run.

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