scholarly journals Extraction of Trace Copper(II) in Water Samples using Ammonium Pyrrolidine Dithiocarbamate(APDC) Modified Carbon Nanotubes to Measurement by FAAS

2016 ◽  
Vol 32 (5) ◽  
pp. 2653-2660
Author(s):  
Hossain Arefazar ◽  
Ali Moghimi
Keyword(s):  
Carbon Nanotubes ◽  
Water Samples ◽  
Pyrrolidine Dithiocarbamate ◽  
Ammonium Pyrrolidine Dithiocarbamate ◽  
Modified Carbon Nanotubes

scholarly journals the Extraction and determination of benzene from waters and wastewater samples based on functionalized carbon nanotubes by static head space gas chromatography mass spectrometry

2020 ◽  
Vol 3 (01) ◽  
pp. 17-26
Author(s):  
Shahnaz Teimoori ◽  
Amir Hessam Hassani *© ◽  
Mostafaa Panaahie
Keyword(s):  
Carbon Nanotubes ◽  
Water Samples ◽  
Gas Chromatography Mass Spectrometry ◽  
Maximum Adsorption Capacity ◽  
Static System ◽  
Benzene Removal ◽  
Wastewater Samples ◽  
Static Head ◽  
Modified Carbon Nanotubes

In this study, the phenyl sulfonic acid (PhSA) modified carbon nanotubes (CNTs) were used for benzene removal from waters by  (D- μSPE). Due to adsorption mechanism, π–π interactions was provided between the aromatic ring of benzene with the surface (SO3H) and phenyl ring (-C6H5) of CNTs, respectively. Therefore, 20-100 mg of sorbent, concentration of benzene (0.1–10 mg L-1), pH (1-12) and contact time (5–120 min) were investigated and optimized for benzene removal from water samples in static system. The concentration of benzene in water was determined by (SHS-GC-MS). The results showed, the Langmuir-Freundlich (LF) isotherm provided the best fit for benzene sorption. By using the Langmuir model, the maximum adsorption capacity of 117.34 and 22.86 mg/g was achieved for benzene removal from waters with CNTs@PhSA and CNTs, respectively. Under optimal conditions, adsorption efficiency of CNTs@PhSA and CNTs was obtained 97.7% and 20.6 % for benzene removal from water samples, respectively. 

Modified carbon nanotubes in online speciation of chromium in real water samples using hyphenated FI-FAAS

2017 ◽  
Vol 41 (12) ◽  
pp. 5034-5039 ◽  
Author(s):  
Shelja Tiwari ◽  
Niharika Sharma ◽  
Reena Saxena
Keyword(s):  
Carbon Nanotubes ◽  
Water Samples ◽  
Polluted Water ◽  
Real Water Samples ◽  
Multi Walled Carbon Nanotubes ◽  
Modified Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Fast preconcentrative speciation of chromium in polluted water samples using l-arginine functionalized multi-walled carbon nanotubes.

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