Preconcentration and Extraction of Copper on Activated Carbon Using 4-Amino-2, 3-dimethyl-1-phenyl-3-pyrazoline or 4-(4-methoxybenzylidenimin) thiophenole

Ghaedi, Mehrorang,Ahmadi, Farshid,Karimi, Hajir,Gharaghani, Shiva Korean Chemical Society 2006 대한화학회지 Vol.50 No.1

원자흡수분광법을 사용하여 실제 시료 중의 구리를 예비 농축하고 정량하는데 활성탄 변형법을 사용하였다. 구리 이온을 4-amino-2,3-dimethyl-1-phenyl-3-pyrazoline(ADMPP) 또는 4-(4-methoxybenzylidenimin)thiophenole (MBITP)과 착물을 형성시켜 활성탄에 정량적으로 흡착시키고, 고체상에 흡착된 구리를 소량의 질산을 사용하여 정량적으로 용리시켰다. 최대 회수율을 얻는데 있어서 중요한 pH, 운반체의 양, 흐름속도, 활성탄의 양, 용리제의 종류 및 농도와 같은 파라미터의 영향을 조사하였다. 최적 조건에서 ADMPP와 MBITP를 사용하는 이 방법은 0.05-1.5g mL1 and 0.05-1.2g mL1의 구리 농도 범위에서 각각 상관계수 0.9997 및 0.9994의 선형성을 보이며 검출한계는 1.4 ng mL1 였다. 예비 농축의 농축인자는 310에 이르며 돌파부피는 두 리간드에서 모두 1550 mL였다. 이 방법은 방해 이온에 대한 공차한계와 선택성이 좋아서 수돗물, 샘물, 강물 및 폐수와 같은 실제 시료 중의 구리 함량을 정량하는 데 성공적으로 사용되었다. carbon modified methods were used for the preconcentration and determination of copper in some real samples using the flame atomic absorption spectrometry. The copper ions was adsorbed quantitatively on the activated carbon due to their complexation with 4- amino-2, 3-dimethyl-1-phenyl-3-pyrazoline (ADMPP) or 4-(4- methoxybenzylidenimin) thiophenole (MBITP). The adsorbed copper on solid phase was eluted quantitatively using small amount of nitric acid. The influence of important parameters including pH, amount of carrier, flow rate, amount of activated carbon and type and concentration of eluting agent for obtaining maximum recovery were investigated. The methods based on ADMPP and MBITP at optimum conditions is linear over concentration range of 0.05-1.5 g mL-1 and 0.05-1.2 g mL-1 of copper with correlation coefficient of 0.9997 and 0.9994 and both detection limit of 1.4 ng mL-1, respectively. The preconcentration leads to enrichment factor of 310 and break through volume of 1550 mL for both ligands. The method has a good tolerance limit of interfering ion and a selectivity that has been successfully applied for the determination of copper content in real sample such as tap, spring, river and waste water.

Comparison of the influence of nanomaterials on response properties of copper selective electrodes

Mehrorang Ghaedi,Morteza Montazerozohori,Reza Sahraei 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4

Novel Cu2+ ion selective electrode in carbon paste matrices based on incorporation of bis(2-hydroxynaphthaldehydene)-1,6-hexanediamine (BHNHDA) has been developed. The influence of variables including sodium tetraphenylborate (NaTPB), ionophore, and amount of multiwalled carbon nanotubes (MWCNT) and Nujol and effect of two new nanoparticles including gold nanoparticles loaded on activated carbon (Au-NP-AC) and zinc sulfide nanoparticles loaded on activated carbon (ZnS-NP-AC)on the electrodes response was studied and optimized. At optimum specified conditions, the proposed electrodes have appropriate advantages such as short response times and suitable reproducibility and applicability for a period of at least 1 month without any significant divergence in slope and response properties. The sensor based on impregnations of MWCNT, Au-NP-AC and ZnS-NP-AC have wide linear range of concentration (6 x 10-8–1.0 x 10-1 mol L-1) and detection limit of lower than 4 x 10-8 mol L-1of Cu2+ ion. The electrodes based on incorporation of Au-NP-AC and ZnS-NP-AC have Nernstian response with slope of 29.34 ± 1.41 and 29.78 ± 1.23 mV decade-1 and response is independent of pH in the range of 2.0–5.0. Finally, these electrodes have been successfully applied for the determination of Cu2+ ions content in various real samples. Due to their acceptable selectivity coefficient, they are usable for accurate and successful evaluation of Cu2+ ions content in various real sample with complicated matrices.

Study of competitive adsorption of malachite green and sunset yellow dyes on cadmium hydroxide nanowires loaded on activated carbon

Mehrorang Ghaedi,Narges Mosallanejad 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.3

Cadmium hydroxide nanowires loaded on activated carbon (Cd(OH)2-NW-AC) was applied for removalof malachite green (MG) and sunset yellow (SY) in single and binary component systems. This novelmaterial was characterized and identified by different techniques such as Brunauer, Emmett and Teller(BET), scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis. Unique properties such ashigh surface area (>1271 m2 g-1) and low pore size (<35 A˚ ) and average particle size lower than 50 A˚ inaddition to high reactive atom and presence of various functional groups make it possible for efficientremoval of these two dyes. In the single component system in this study, maximum adsorption capacityof 80.6 for SY and 19.0 mg g-1 for MG at 25 ℃ was reported. The Langmuir model had very well fit withthe experimental data (R2 > 0.996). A better agreement between the adsorption equilibrium data andmono-component Langmuir isotherm model was found. The kinetics of adsorption for single and binarymixture solutions at different initial dye concentrations were evaluated by the nonlinear first-order andsecond-order models. The second-order kinetic model had very well fit with the dynamical adsorptionbehavior of a single dye for lower and higher initial dye concentrations. SY and MG without spectraoverlapping were chosen and analyzed with high accuracy in binary solutions. The effect of multi-solutesystems on the adsorption capacity was investigated. The isotherm constants for SY and MG were alsocalculated in binary component systems at concentrations within moderate ranges, the Langmuirisotherm model satisfactorily predicted multi-component adsorption equilibrium data. The competitiveadsorption favored the SY in the A mixture solution (both SY and MG concentration at 10 mg L-1) and Bmixture solution (25 mg L-1 of SY and 10 mg L-1 of MG). Also, in both cases, kinetic data was fairlydescribed by two-step diffusion model. An endothermic and spontaneous nature for the adsorption ofthe dyes studied were shown from thermodynamic parameters in single and binary component systems.

Solid phase extraction and removal of brilliant green dye on zinc oxide nanoparticles loaded on activated carbon: New kinetic model and thermodynamic evaluation

Mehrorang Ghaedi,Goodarz Negintaji,Hajir karimi,Farzaneh Marahel 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4

The brilliant green (BG) solid phase extraction of carried out following accumulation on including zinc oxide nanoparticles loaded on activated carbon (ZNO-NP-AC) non-toxic and green as material. The influence of variables such as pH, initial BG concentration, contact time, amount of adsorbent, eluent and temperature on BG removal and recoveries were studied and optimized. The high correlation coefficient and possibility of accurate prediction and explanation of experimental data by novel kinetic model show its applicability and superiority for representation of experimental data. The results of present model compared with traditional kinetic models (pseudo-first and second order and intraparticle diffusion model). Additionally, fitting the experimental equilibrium data to numerous conventional isotherm models show that the Langmuir model with high correlation coefficient and low error analysis is more usable to explain the experimental data. The calculated change in entropy and enthalpy of BG adsorption on proposed adsorbent was 136.59 J mol 1 K 1 for 15.0 mg L 1 and 65.2 J mol 1 K 1 35.2 kJ/mol and 16.1 kJ/mol for 15 mg L 1. The quantitative elution of retained BG by 2.0 mL of EtOH make permit accurate and repeatable monitoring off BG over wide linear range (0.2–500 ng mL 1) with limits of detection (LODs) of 0.08 ng mL 1. The preconcentration factors were 75 and loading half time (t1/2) values were less than 5 min.

Chemically modified carbon nanotubes as efficient and selective sorbent for enrichment of trace amount of some metal ions

Mehrorang Ghaedi,Morteza Montazerozohori,Neda Rahimi,Mehdi Nejati Biysreh 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.5

Multi-walled carbon nanotubes (MWCNT) was oxidized and chemically functionalized by 3-hydroxy-4-((3-silylpropylimino) methyl) phenol (HSPIMP) and characterized with FT-IR technique. This new sorbent was used for enrichment and preconcentration of Cu2+, Ni2+, Zn2+, Pb2+, Co2+, Fe3+ ions. Variables such as pH, amount of solid phase, eluting solution conditions (type, volume and concentrations) have significant effect on sorption and recoveries of analytes and the influence was optimized. At optimum value of conditions, the interference of other ions on understudy ions recoveries was investigated. The metal ions loaded on the solid phase via chelation with the new sorbent and subsequently efficiently eluted using 6 mL of 4 mol L-1 HNO3 solution. At each run, metal ions content was determined by flame atomic absorption spectrometry (FAAS). Relative standard deviation (N = 3) for determination of 0.2 mg mL-1 of analytes was between 1.6 and 3.0%, while their detection limit was between 1.0 and 2.6 ng mL-1 (3Sb, n = 10). The sorption capacity of HSPIMP–MWCNT for understudy ions was above 30 mg g-1. The proposed method successfully applied for the extraction and determination of the understudy metal ions in different samples.

Equilibrium, kinetic and isotherm of some metal ion biosorption

Mehrorang Ghaedi,Shaaker Hajati,Farahnaz Karimi,Behnaz Barazesh,Gholamreza Ghezelbash 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.3

Trichoderma reesei was used as a biosorbent for the removal of Co2+, Cu2+, Ni2+, Pb2+ and Zn2+ ions. The influence of factors such as pH, mass of biomass, contact time and temperature on biosorption efficiency was optimized. To calculate the isotherm parameters for the biosorption of Co2+, Cu2+, Ni2+, Pb2+ and Zn2+ions at optimized conditions, the experimental equilibrium data were fitted to Langmuir and Freundlich models. The calculated thermodynamic parameters, DG8, DH8 and DS8 showed that the biosorption of Co2+, Cu2+, Ni2+, Pb2+ and Zn2+ ions onto T. reesei biomass was feasible, spontaneous and endothermic at the optimized conditions. The results of kinetic analysis showed that the biosorption of the selected metal ions onto T. reesei biomass obeys pseudo second order kinetics.

Palladium, silver, and zinc oxide nanoparticles loaded on activated carbon as adsorbent for removal of bromophenol red from aqueous solution

Mehrorang Ghaedi,Maryam Ghayedi,Syamak Nasiri Kokhdan,Reza Sahraei,Ali Daneshfar 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.4

The adsorption of bromophenol red (BPR) onto three adsorbents including palladium, silver and zinc oxide nanoparticles loaded on activated carbon (Pd-NP-AC, Ag-NP-AC and ZnO-NP-AC) in a batch system has been studied and the influence of various parameters has been optimized. The influence of time on removal of BPR on all adsorbent was investigated and experimental data were analyzed by four kinetic models including pseudo first and second-order, Elovich and the intraparticle diffusion equations. Following fitting the experimental data to these models, the respective parameters of each model such as rate constants, equilibrium adsorption capacities and correlation coefficients for each model were investigated and based on well known criterion their applicability was judged. It was seen that the adsorption of BPR onto all adsorbents sufficiently described by the pseudo second-order equation in addition to interparticle diffusion model. The adsorption of BPR on all adsorbent was investigated at various concentration of dye and the experimental equilibrium data were analyzed and fitted to the Langmuir, Freundlich, Tempkin, Dubinin, and Radushkevich equations. A single stage in batch process was efficient and suitable for all adsorbents using the Langmuir isotherm with maximum adsorption of 143 mg gˉ1 for Pd-NP-AC, 250 mg gˉ1 for Ag-NP-AC and 200 mg gˉ1 for ZnO-NR-AC. Thermodynamic parameters such as DG8, DH8, and DS8 for Pd-NP-AC adsorbent were calculated.

Equilibrium, kinetic and thermodynamic study of removal of reactive orange 12 on platinum nanoparticle loaded on activated carbon as novel adsorbent

Mehrorang Ghaedi,Javad Tashkhourian,Arezoo Amiri Pebdani,Batol Sadeghian,Fatemeh Nami Ana 한국화학공학회 2011 Korean Journal of Chemical Engineering Vol.28 No.12

The proposed research describes the synthesis and characterization of platinum nanoparticles loaded on activated carbon (Pt-NP-AC) and its efficient application as novel adsorbent for efficient removal of reactive orange 12 (RO-12). The influences of effective parameters following the optimization of variables on removal percentages,their value was set as 0.015 g Pt-NP-AC, pH 1, contact time of 13 min. At optimum values of all variables at 25 and 50 mgL−1 of RO-12 enthalpy (ΔH0) and entropy (ΔS0) changes was found to be 59.89 and 225.076, respectively, which negative value of ΔG0 shows a spontaneous nature, and the positive values of ΔH0 and ΔS0 indicate the endothermic nature and adsorption organized of dye molecule on the adsorbent surface. Experimental data was fitted to different kinetic models including first-order, pseudo-second-order, Elovich and intra-particle diffusion models, and it was seen that the adsorption process follows pseudo-second-order model in consideration to intra-particle diffusion mechanism. At optimum values of all variables, the adsorption process follows the second-order kinetic and Langmuir isotherm model with adsorption capacity 285.143 mg g−1 at room temperature.

Saccharomyces cerevisiae for the biosorption of basic dyes from binary component systems and the high order derivative spectrophotometric method for simultaneous analysis of Brilliant green and Methylene blue

Mehrorang Ghaedi,Shaaker Hajati,Behnaz Barazesh,Farahnaz Karimi,Gholamreza Ghezelbash 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.1

In this work, biosorption of Brilliant green (BG) and Methylene blue (MB) dyes in binary mixture onto Saccharomyces cerevisiae were studied. pH at which the biosorption capacity of biomass is maximum was found to be 6 which is close to the pH of natural aqueous solutions. This is a big advantage of S. cerevisiae which makes it applicable for the technology of dye removal from natural aqueous dye solutions. Note that the time for the applied biosorption process for the dye removal is considerably short (about 5 min)which is a big improvement for the adsorption processes. This proves that the S. cerevisiae is a promising adsorbent. The BG and MB dyes were simultaneously analyzed using the fifth and fourth order derivative spectrophotometric method, respectively. Several isotherm models were applied to experimental data and the isotherm constants were calculated for BG and MB dyes. Among the applied models, Freundlich isotherm model showed best fit to the biosorption equilibrium data.

Polyvinyl alcohol/Fe3O4@carbon nanotubes nanocomposite: Electrochemical-assisted synthesis, physicochemical characterization, optical properties, cytotoxicity effects and ultrasound-assisted treatment of aqueous based organic compound

Fardin Sadeghfar,Mehrorang Ghaedi,Arash Asfaram,Ramin Jannesar,Hamedreza Javadian,Vahid Pezeshkpour 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-

In this research study, the polyvinyl alcohol/Fe3O4@carbon nanotubes (PVA/Fe3O4@CNTs) nanocomposite was prepared by electrochemical-assisted synthesis method, characterized by FT-IR, UV–vis, FE-SEM, TEM, BET and XRD techniques, and subsequently applied for the ultrasound-assisted removal of methylene blue (MB) dye from aqueous solution and as antibacterial agent in vitro investigation against Proteus mirabilis (PM), Methicillin-resistant Staphylococcus aureus (MRSA), Escherichia coli (E. Coli) and Pseudomonas aeruginosa (PAO1) bacteria. The effects of important variables such as the initial concentration of MB, adsorbent mass, sonication time and pH on the removal percentage of MB were investigated and optimized by central composite design (CCD). The experimental results were applied for the construction of a quadratic model to predict the response following the analysis of variance (ANOVA) and to obtain useful information about the possible interaction between the variables and their main effects. The high F-value (207.38), low P-value (<0.0001) and non-significant lack of fit (P-value >  0.05) along with the reasonable value of the coefficient of determination (R2 = 0.99452) confirmed a good correlation between the experimental and predicted values. The highest removal percentage of 99.5% was attained at the optimum conditions of 0.035 g of the adsorbent, 25.0 mg L−1 of dye concentration, 6 min sonication time and pH = 5.5. The adsorption process of MB by PVA/3 wt% Fe3O4@CNTs was well described by pseudo-second-order kinetic and Langmuir isotherm models. A low dose of PVA/Fe3O4@CNTs nanocomposite (0.005 g) was successfully used for the adsorption of MB (R% > 90.0%) within a short time (6.0 min) with the highest monolayer adsorption capacity of 250.10 mg g−1 at 25 °C.