scholarly journals Adsorption of Mixtures of Toxic Metal Ions Using Non-Viable Cells of Saccharomyces Cerevisiae

2012 ◽  
Vol 30 (1) ◽  
pp. 43-63 ◽  
Author(s):  
Shahram Amirnia ◽  
Argyrios Margaritis ◽  
Madhumita B. Ray
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Toxic Metal ◽  
Operating Conditions ◽  
Ion Concentration ◽  
Yeast Cells ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Model Equations ◽  
Biomass Dosage

The use of waste biomaterial for the adsorption of heavy metal ions is an economically appealing alternative to conventional metal ion removal methods. In the present work, S. cerevisiae biomass has been shown to be capable of the simultaneous removal of more than 98% of Pb(II) ions, 60% of Zn(II) ions and up to 55% of Cu(II) ions from aqueous solutions in the 10–50 mg/ℓ concentration range. Model equations describing the removal efficiency of each metal ion were determined using Response Surface Methodology (RSM) with respect to operating conditions such as pH, initial metal ion concentration and biomass dosage. Characterization of the metal ion–biomass interactions responsible for biosorption was studied employing zeta potential measurements, BET, FT-IR and EDX techniques; these indicated that the uptake of metal ions by non-living yeast was a surface adsorption phenomenon. The results proved the involvement of an ion-exchange mechanism between the adsorbing metal ions and the cell walls. In the presence of the complete range of metal ions studied, yeast cells were more selective towards Pb(II) ions.

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 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.

Heavy and toxic metal ion removal by a novel polymeric ion-exchanger: synthesis, characterization, kinetics and equilibrium studies

2014 ◽  
Vol 90 (12) ◽  
pp. 2170-2179 ◽  
Author(s):  
Raja S. Azarudeen ◽  
Mohamed A. Riswan Ahamed ◽  
R. Subha ◽  
Abdul R. Burkanudeen
Keyword(s):  
Metal Ion ◽  
Toxic Metal ◽  
Ion Exchanger ◽  
Equilibrium Studies ◽  
Metal Ion Removal ◽  
Ion Removal

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 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.

Chemical equilibria in wastewaters during toxic metal ion removal by agricultural biomass

2010 ◽  
Vol 254 (17-18) ◽  
pp. 2181-2192 ◽  
Author(s):  
Valeria Marina Nurchi ◽  
Guido Crisponi ◽  
Isabel Villaescusa
Keyword(s):  
Metal Ion ◽  
Toxic Metal ◽  
Chemical Equilibria ◽  
Agricultural Biomass ◽  
Metal Ion Removal ◽  
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 Isotherm, Kinetics and Thermodynamics of Cu(II) and Pb(II) Adsorption on Groundwater Treatment Sludge-Derived Manganese Dioxide for Wastewater Treatment Applications

2021 ◽  
Vol 18 (6) ◽  
pp. 3050
Author(s):  
Stephanie B. Tumampos ◽  
Benny Marie B. Ensano ◽  
Sheila Mae B. Pingul-Ong ◽  
Dennis C. Ong ◽  
Chi-Chuan Kan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Metal Ion ◽  
Acid Leaching ◽  
Single Layer ◽  
Toxic Metal ◽  
Ion Concentration ◽  
Groundwater Treatment ◽  
Toxic Heavy Metals ◽  
Solution Ph ◽  
Metal Ion Removal

The ubiquitous occurrence of heavy metals in the aquatic environment remains a serious environmental and health issue. The recovery of metals from wastes and their use for the abatement of toxic heavy metals from contaminated waters appear to be practical approaches. In this study, manganese was recovered from groundwater treatment sludge via reductive acid leaching and converted into spherical aggregates of high-purity MnO2. The as-synthesized MnO2 was used to adsorb Cu(II) and Pb(II) from single-component metal solutions. High metal uptake of 119.90 mg g−1 for Cu(II) and 177.89 mg g−1 for Pb(II) was attained at initial metal ion concentration, solution pH, and temperature of 200 mg L−1, 5.0, and 25 °C, respectively. The Langmuir isotherm model best described the equilibrium metal adsorption, indicating that a single layer of Cu(II) or Pb(II) was formed on the surface of the MnO2 adsorbent. The pseudo-second-order model adequately fit the Cu(II) and Pb(II) kinetic data confirming that chemisorption was the rate-limiting step. Thermodynamic studies revealed that Cu(II) or Pb(II) adsorption onto MnO2 was spontaneous, endothermic, and had increased randomness. Overall, the use of MnO2 prepared from groundwater treatment sludge is an effective, economical, and environmentally sustainable substitute to expensive reagents for toxic metal ion removal from water matrices.

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