scholarly journals Removability Efficiency of Heavy Metals with Modified Humate from Aqueous Media

2014 ◽  
Vol 16 (4) ◽  
Author(s):  
A.S. Taubayeva ◽  
U.Z. Dzhusipbekov ◽  
G.О. Nurgalieva ◽  
A.K. Shakirova ◽  
H. Temel ◽  
...  
Keyword(s):  
Metal Ions ◽  
Sorption Capacity ◽  
Humic Acids ◽  
Aqueous Media ◽  
Toxic Metal ◽  
High Reactivity ◽  
Complex Compounds ◽  
Sorption Ability ◽  
Maximum Sorption ◽  
High Sorption

<p>The main aim of this work was to study the possibility of using amine-modified humate as a sorbent for the purification of water from heavy metal ions (Cu&amp;Co). One of the effective methods of creating new sorbents of humic acids is chemical modification based on the high reactivity of the functional groups in the composition of humic acids. The possibility of modification of humic acid with bis(3-aminopropyl)  amine was illustrated. Modification was carried out with the aim of increasing its sorption capacity. Metal-humate complexes were also obtained by an ion-exchange procedure with modified humate (Mod-Hum) by employing metal salts such as Cu(CH<sub>3</sub>COO)<sub>2</sub>·H<sub>2</sub>O, Co(CH<sub>3</sub>COO)<sub>2</sub>·4H<sub>2</sub>O. Maximum sorption percentages of Mod-Hum achieved were about 99.2% for Cu (II) and 90% for Co (II). The sorption degree depending on pH changes was studied in the range of 2 to 8, the sorption ability of the sorbents was stated to increase with the increase in pH. The degree of sorption of copper (ІІ) on Mod-Hum in the studied range of рН 5 was higher and of cobalt (II) for which the sorption is optimal at higher values (рН 7-8). It is stated that sorption degree increases with the increase in time from 15 min to 2 h. The adsorption of toxic metal ions with Mod-Hum was measured by atomic absorption spectroscopy (AAS). The experimental results on determination of the adsorption isotherm were evaluated with the Langmuir equation. It is shown that the sorbent develops a high sorption capacity in regard to ions of Cu (18.42 mg/g) and Со (16.25 mg/g). All the obtained complex compounds were analyzed and characterized by FT infrared spectroscopy (FTIR), scanning electron microscopy (SEM).</p>

Cucumis melo Rind as Biosorbent to Remove Fe(II) and Mn(II) from Synthetic Groundwater Solution

2013 ◽  
Vol 795 ◽  
pp. 266-271 ◽  
Author(s):  
Norzila Othman ◽  
Syazwani Mohd Asharuddin
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Metal Concentration ◽  
Sorption Capacity ◽  
Cucumis Melo ◽  
Carboxyl Groups ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Synthetic Groundwater ◽  
Effective Sorbent

Cucumis melo rind was evaluated as a new biosorbent for the removal of Fe (II) and Mn (II) from synthetic groundwater solution. The maximum sorption capacity of Fe (II) and Mn (II) was found to be 4.98 mg/g and 1.37 mg/g respectively. Sorption was most efficient at pH 7 and 6.5 for Fe (II) and Mn (II) respectively. The biosorption of both metals increased as the quantity of biosorbent increased. The increase in initial metal concentration was associated with steep increase in biosorption at lower concentrations and progressively reaching towards plateau at higher metal concentration. FTIR demonstrated that hydroxyl and carboxyl groups were involved in the biosorption of the metal ions. The study points to the potential of new use of Cucumis melo rind as an effective sorbent for the removal of Fe (II) and Mn (II) from aqueous solution.

Synthesis and characterization of Fe3O4@TSC nanocomposite: highly efficient removal of toxic metal ions from aqueous medium

RSC Advances ◽  
2016 ◽  
Vol 6 (27) ◽  
pp. 22679-22689 ◽  
Author(s):  
Ayoub Abdullah Alqadami ◽  
Mu Naushad ◽  
Mohammad Abulhassan Abdalla ◽  
Tansir Ahamad ◽  
Zeid Abdullah Alothman ◽  
...  
Keyword(s):  
Metal Ions ◽  
Aqueous Medium ◽  
Aqueous Media ◽  
Toxic Metal ◽  
Synthesis And Characterization ◽  
Magnetic Adsorbent ◽  
Efficient Removal ◽  
Toxic Metal Ions ◽  
Highly Efficient

A new magnetic adsorbent Fe3O4@TSC was used for the removal of Cr3+ and Co2+ metal ions from aqueous media.

scholarly journals 6-Polyamino-substituted quinolines: synthesis and multiple metal (CuII, HgIIand ZnII) monitoring in aqueous media

2019 ◽  
Vol 17 (17) ◽  
pp. 4243-4260 ◽  
Author(s):  
Anton S. Abel ◽  
Alexei D. Averin ◽  
Andrey V. Cheprakov ◽  
Vitaly A. Roznyatovsky ◽  
Franck Denat ◽  
...  
Keyword(s):  
Metal Ions ◽  
Aqueous Media ◽  
Toxic Metal ◽  
Optical Analysis ◽  
Toxic Metal Ions ◽  
Physiological Conditions ◽  
Substituted Quinolines

Multi-signaling or multi-metal optical analysis of toxic metal ions under physiological conditions.

scholarly journals Functionalized macroporous copolymer of glycidyl methacrylate: The type of ligand and porosity parameters influence on Cu(II) ion sorption from aqueous solutions

2009 ◽  
Vol 63 (3) ◽  
pp. 269-273 ◽  
Author(s):  
Zvjezdana Sandic ◽  
Aleksandra Nastasovic
Keyword(s):  
Heavy Metals ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Glycidyl Methacrylate ◽  
Mechanical Stability ◽  
Fast Kinetics ◽  
Maximum Sorption Capacity ◽  
Maximum Sorption ◽  
Chelating Polymers

The removal of heavy metals from hydro-metallurgical and other industries' wastewaters, their safe storage and possible recovery from waste- water streams is one of the greater ecological problems of modern society. Conventional methods, like precipitation, adsorption and biosorption, electrowinning, membrane separation, solvent extraction and ion exchange are often ineffective, expensive and can generate secondary pollution. On the other hand, chelating polymers, consisting of crosslinked copolymers as a solid support and functional group (ligand), are capable of selectively loading different metal ions from aqueous solutions. In the relatively simple process, the chelating copolymer is contacted with the contaminated solution, loaded with metal ions, and stripped with the appropriate eluent. Important properties of chelating polymers are high capacity, high selectivity and fast kinetics combined with mechanical stability and chemical inertness. Macroporous hydrophilic copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate modified by different amines show outstanding efficiency and selectivity for the sorption of precious and heavy metals from aqueous solutions. In this study poly(GMA-co-EGDMA) copolymers were synthesized with different porosity parameters and functionalized in reactions with ethylene diamine (EDA), diethylene triamine (DETA) and triethylene tetramine (TETA). Under non-competitive conditions, in batch experiments at room temperature, the rate of sorption of Cu(II) ions from aqueous solutions and the influence of pH on it was determined for four samples of amino-functionalized poly(GMA-co-EGDMA). The sorption of Cu(II) for both amino-functionalized samples was found to be very rapid. The sorption half time, t1/2, defined as the time required to reach 50% of the total sorption capacity, was between 1 and 2 min. The maximum sorption capacity for copper (2.80 mmol/g) was obtained on SGE-10/12-deta sample. The sorption capacity of Cu(II) ions increases with increasing pH and has maximum at pH ~5. In the experimental pH range, the maximum sorption capacity of Cu(II) ions again is reached on SGE-10/12-deta. By comparing literature data and obtained results it is possible to conclude that amino-functionalized macroporous copolymers based on glycidyl methacrylate are efficient for sorption of Cu(II) ions from aqueous solutions and sorption capacity for copper mostly depends on type of amine with which the basic copolymer is functionalized.

scholarly journals Use of Vermicompost for the Removal of Toxic Metal Ions of Synthetic Aqueous Solutions and Real Aqueous Waste

2018 ◽  
Vol 43 (1SI) ◽  
pp. 35 ◽  
Author(s):  
Luane Patricia Guedes Barbosa ◽  
Tácila Oliveira Pinto De Freitas ◽  
Madson De Godoi Pereira
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Aqueous Media ◽  
Toxic Metal ◽  
National Council ◽  
Mechanical Agitation ◽  
Chemical Laboratory ◽  
Toxic Metal Ions ◽  
Legal Limits ◽  
Metallic Cations

Samples of vermicompost were used to decontaminate aqueous media containing Cd2+, Cu2+, Mn2+, Ni2+, Pb2+ and/or Zn2+ at concentration up to 10X higher than the limits of National Council of the Environment (Resolution 430/2011). For this purpose, 50.00 mL of synthetic solutions and wastewater from a chemical laboratory were stirred with dried vermicompost (~10.0000 g), in natura or with diameter ≤ 0.053 mm. Aqueous media were treated with vermicompost, either at rest (24, 48, 72, and/or 96 h) or under mechanical agitation (2, 4, 6, 8, and/or 10 h). All elements were spectrometrically determined in the different supernatants. In the synthetic solutions, except for Mn2+and Zn2+, all cations were undetectable (concentrations lower than the legal limits), when in natura vermicompost was used. After treating synthetic solutions with sieved vermicompost, Cd2+, Cu2+, Ni2+, Pb2+ e Zn2+ concentrations were undetectable, while Mn2+ concentrations were too close to the legal limits. In the wastewater, Cd2+and Pb2+ concentrations, which were 1.5 and 3.8X higher than the legal limits, respectively, were undetectable after treatment with vermicompost in natura. Besides its efficiency of retaining the evaluated metallic cations, vermicompost was able to increase the aqueous media pH from 0.9 to 6.0 ± 0.5.    

scholarly journals Heavy Metals Removal from Electroplating Wastewater by Waste Fiber-Based Poly(amidoxime) Ligand

Water ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1260
Author(s):  
Md. Lutfor Rahman ◽  
Zhi Jian Wong ◽  
Mohd Sani Sarjadi ◽  
Sabrina Soloi ◽  
Sazmal E. Arshad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Metal Ions ◽  
Sorption Capacity ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Toxic Metal ◽  
High Concentration ◽  
Trace Level ◽  
Electroplating Wastewater ◽  
Toxic Metal Ions

An efficient and economical treatment technology for heavy metal removal from the electroplating wastewaters is needed for the water purification. Therefore, pure cellulosic materials were derived from two waste fiber (pandanus fruit and durian rind) and conversion of the cellulose into the poly(acrylonitrile)-grafted material was accomplished by free radical grafting system. Thereafter, poly(amidoxime) ligand was produced from the grafted materials. Sorption capacity (qe) of several toxic metals ions was found to be high, e.g., copper capacity (qe) was 298.4 mg g−1 at pH 6. In fact, other metal ions, such as cobalt chromium and nickel also demonstrated significant sorption capacity at pH 6. Sorption mechanism played acceptable meet with pseudo second-order rate of kinetic pattern due to the satisfactory correlation with the experimental sorption values. A significant correlation coefficient (R2 > 0.99) with Langmuir model isotherm showed the single or monolayer sorption occurred on the surfaces. The reusability study showed that the polymer ligand can be useful up to six cycles with minimum loss (7%) of efficiency and can be used in the extraction of toxic metal ions present in the wastewaters. Therefore, two types of electroplating wastewater were used in this study, one containing high concentration of copper (23 ppm) and iron (32 ppm) with trace level of others heavy metals (IWS 1) and another containing high concentration of copper (85.7 ppm) only with trace level of others heavy metals (IWS 2). This polymeric ligand showed acceptable removal magnitude, up to 98% of toxic metal ions can be removed from electroplating wastewater.

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