Recent developments in fluorescent sensors for trace-level determination of toxic-metal ions

2012 ◽  
Vol 32 ◽  
pp. 113-132 ◽  
Author(s):  
Mili Dutta ◽  
Debasis Das
Keyword(s):  
Metal Ions ◽  
Toxic Metal ◽  
Fluorescent Sensors ◽  
Trace Level ◽  
Toxic Metal Ions ◽  
Recent Developments ◽  
Trace Level Determination

scholarly journals Metallo-Graphene Nanocomposite Electrocatalytic Platform for the Determination of Toxic Metal Ions

Sensors ◽  
2011 ◽  
Vol 11 (4) ◽  
pp. 3970-3987 ◽  
Author(s):  
Chandre M. Willemse ◽  
Khotso Tlhomelang ◽  
Nazeem Jahed ◽  
Priscilla G. Baker ◽  
Emmanuel I. Iwuoha
Keyword(s):  
Metal Ions ◽  
Toxic Metal ◽  
Toxic Metal Ions ◽  
Graphene Nanocomposite

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.

scholarly journals Adsorption of Toxic Metal Ions onto Silica with Covalently Bound 8-Hydroxyquinoline

2006 ◽  
Vol 24 (3) ◽  
pp. 229-238 ◽  
Author(s):  
E.S. Yanovska ◽  
O.V. Glushchenko ◽  
V.I. Karmanov ◽  
O.Yu. Kichkiruk ◽  
V.A. Tertykh
Keyword(s):  
Metal Ions ◽  
Toxic Metal ◽  
Solid Matrix ◽  
Dynamic Mode ◽  
X Ray ◽  
Toxic Metal Ions ◽  
Fluorescence Determination ◽  
Fluorescence Methods ◽  
Covalently Bound

8-Hydroxyquinoline covalently bound to silica via a one-stage Mannich reaction was used as an adsorbent for the pre-concentration of Pb(II), Cd(II), Zn(II) and Mo(VI) ions from aqueous solutions in the dynamic mode following determination of their concentrations by X-ray fluorescence methods. The adsorption of Pb(II), Cd(II), Zn(II) and Mo(VI) ions was studied from individual and complex multi-component solutions of both natural and technogenic origins. Peculiarities associated with the simultaneous X-ray fluorescence determination of mixtures of toxic metal ions in a solid matrix are discussed.

Sign in / Sign up

Export Citation Format

Share Document