Removal of nitrate ions from aqueous solution using zero-valent iron nanoparticles supported on high surface area nanographenes

2015 ◽  
Vol 212 ◽  
pp. 708-715 ◽  
Author(s):  
Mohamed Abdel Salam ◽  
Olfat Fageeh ◽  
Shaeel A. Al-Thabaiti ◽  
Abdullah Y. Obaid
Keyword(s):  
Aqueous Solution ◽  
Surface Area ◽  
Iron Nanoparticles ◽  
High Surface ◽  
High Surface Area ◽  
Zero Valent Iron ◽  
Nitrate Ions ◽  
Zero Valent Iron Nanoparticles

scholarly journals Adsorption/reduction of N-dimethylnitrosamine from aqueous solution using nano zero-valent iron nanoparticles supported on ordered mesoporous silica

2017 ◽  
Vol 17 (4) ◽  
pp. 1097-1105 ◽  
Author(s):  
Xiaodong Xin ◽  
Shaohua Sun ◽  
Mingquan Wang ◽  
Qinghua Zhao ◽  
Yan Chen ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Iron Nanoparticles ◽  
Catalytic Reduction ◽  
High Surface ◽  
High Surface Area ◽  
Zero Valent Iron ◽  
Product Analysis ◽  
Solution Ph ◽  
Zero Valent Iron Nanoparticles ◽  
Mcm 41

N-Dimethylnitrosamine (NDMA) has aroused increasing concern among public health agencies. It is necessary to develop some effective methods to remove NDMA from drinking water. A reductive process has been investigated as an alternative treatment method for NDMA removal from water. In this manuscript, zero-valent iron nanoparticles (ZVINPs) were synthesized, and then supported on mesoporous silica materials with high surface area (MCM-41) to prepare a stable ZVINP/MCM-41 nanocomposite. X-ray diffraction measurements showed the stabilization of the ZVINPs upon their support on MCM-41, which enhanced their activity. The ZVINP/MCM-41 nanocomposite was used for the catalytic reduction of NDMA in the model solution, and the results showed the dependency of the removal process on the ZVINP/MCM-41 mass, time of removal, and solution pH. The mechanism of NDMA reduction by ZVINP/MCM-41 was studied, and the results showed the conversion of NDMA to unsymmetrical dimethylhydrazine, dimethylamine (DMA) and NH4+. The product analysis found that in the process of removal, adsorption and reduction existed at the same time.

scholarly journals Investigation on adsorption capacity of TiO2-P25 nanoparticles in the removal of a mono-azo dye from aqueous solution: A comprehensive isotherm analysis

2014 ◽  
Vol 20 (1) ◽  
pp. 97-107 ◽  
Author(s):  
Mohammad Behnajady ◽  
Shahrzad Yavari ◽  
Nasser Modirshahla
Keyword(s):  
Aqueous Solution ◽  
Crystallite Size ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Correlation Coefficients ◽  
Average Crystallite Size ◽  
Isotherm Models ◽  
Equilibrium Data ◽  
Pseudo Second Order

In this work TiO2-P25 nanoparticles with high surface area have been used as adsorbent for the removal of C.I Acid Red 27 (AR27), as an organic contaminant from aqueous solution. Characteristics of phases and crystallite size of TiO2-P25 nanoparticles were achieved from XRD and the surface area and pore size distribution were obtained from BET and BJH techniques. TiO2-P25 nanoparticles with almost 80% anatase and 20% rutile phases, the average crystallite size of 18 nm, have specific surface area of 56.82 m2 g-1. The effect of various parameters like initial AR27 concentration, pH, contact time and adsorbent dosage has been carried out in order to find desired adsorption conditions. The desired pH for adsorption of AR27 onto TiO2-P25 nanoparticles was 3. The equilibrium data were analyzed with various 2-, 3- and 4-parameter isotherm models. Equilibrium data fitted very well by the 4-parameter Fritz-Schluender model. Results of adsorption kinetics study indicated that the pseudo-second order kinetics provided the best fit with correlation coefficients close to unity.

Perchlorate degradation in aqueous solution using chitosan-stabilized zero-valent iron nanoparticles

2016 ◽  
Vol 171 ◽  
pp. 164-173 ◽  
Author(s):  
Yanhua Xie ◽  
Yan Yi ◽  
Yinhong Qin ◽  
Lanting Wang ◽  
Guoming Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Iron Nanoparticles ◽  
Zero Valent Iron ◽  
Zero Valent Iron Nanoparticles

Adsorption of different dyes from aqueous solution using Si-MCM-41 having very high surface area

2016 ◽  
Vol 23 (5) ◽  
pp. 1227-1237 ◽  
Author(s):  
Haribandhu Chaudhuri ◽  
Subhajit Dash ◽  
Ashis Sarkar
Keyword(s):  
Aqueous Solution ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Very High ◽  
Mcm 41

Fabrication of Ultra-Low Density, High Surface Area Carbon Aerogels and their Application in Supercapacitors

2016 ◽  
Vol 852 ◽  
pp. 1349-1355
Author(s):  
Jia Yi Zhu ◽  
Xi Yang ◽  
Zhi Bing Fu ◽  
Chao Yang Wang ◽  
Wei Dong Wu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Three Dimensional ◽  
Carbon Aerogel ◽  
Carbon Aerogels ◽  
Low Density ◽  
Organic Aerogel ◽  
Cyclic Voltammetry Test

The ultra-low density carbon aerogel, as low as 20 mg/cm3, was fabricated by pyrolysis of the organic aerogel formed by aqueous condensation of resorcinol and formaldehyde. Its surface area was as high as 1783 m2/g and it was used for investigation of electrochemical capacitive behaviours. The ultra-low density carbon aerogel displayed capacitive performance (110 F/g at 0.2 A/g) in 6 M KOH aqueous solution. Additionally, over 98% of the initial capacitance was retained after repeating the cyclic voltammetry test for 1000 cycles. The electrochemical performance might be attributed to the combination of three dimensional “opened” structure and high surface area of the carbon aerogel.

scholarly journals The Amine Functionalized Sugarcane Bagasse Biocomposites as Magnetically Adsorbent for Contaminants Removal in Aqueous Solution

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5867
Author(s):  
Chairul Irawan ◽  
Meilana Dharma Putra ◽  
Hesti Wijayanti ◽  
Rinna Juwita ◽  
Yenny Meliana ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Surface Area ◽  
Sugarcane Bagasse ◽  
High Surface ◽  
High Surface Area ◽  
Oxygen Demand ◽  
Total Suspended Solid ◽  
Suspended Solid ◽  
Ion Removal ◽  
Amine Functionalized

The method of solvothermal by one-step operation has been performed to synthesize of magnetic amine-functionalized sugarcane bagasse biocomposites (SB-MH). The obtained SB-MH contains 62.34% of Fe, 17.8 mmol/g of amine, and a magnetic property of 19.46 emu/g. The biocomposite surface area increased significantly from 1.617 to 25.789 m2/g after amine functionalization. The optimum condition of SB-MH used for Pb(II) ion removal was achieved at pH 5 for 360 min with adsorption capacity of 203.522 mg/g. The pseudo 2nd order was well-fitted to the model of Pb(II) ion adsorption. Meanwhile, other contaminant parameters number of Chemical Oxygen Demand (COD), Total Suspended Solid (TSS), and dye in wastewater were also remarkably reduced by about 74.4%, 88.0%, and 96.7%, respectively. The reusability of SB-MH with 4th repetitions showed only a slight decrease in performance of 5%. Therefore, the proposed magnetic amine-functionalized sugarcane bagasse biocomposites lead to a very potential adsorbent implemented in high scale due to high surface area, easy separation, stable materials and capability to adsorb contaminants from aqueous solution.

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