Correlation of acid–base chemistry of phytochelatin PC2 with its coordination properties towards the toxic metal ion Cd(ii)

2003 ◽  
pp. 2253-2259 ◽  
Author(s):  
Vlastimil Dorčák ◽  
Artur Krężel
Keyword(s):  
Metal Ion ◽  
Toxic Metal ◽  
Acid Base ◽  
Coordination Properties

Red-fluorescent graphene quantum dots from guava leaf as a turn-off probe for sensing aqueous Hg(ii)

2021 ◽  
Vol 45 (10) ◽  
pp. 4617-4625
Author(s):  
Rahul V. Khose ◽  
Goutam Chakraborty ◽  
Mahesh P. Bondarde ◽  
Pravin H. Wadekar ◽  
Alok K. Ray ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Metal Ion ◽  
Leaf Extract ◽  
Graphene Quantum Dots ◽  
Toxic Metal ◽  
Guava Leaf

In this work, we have prepared red-fluorescent graphene quantum dots and utilized as a highly selective and sensitive fluorescence turn-off probe for detection of the toxic metal ion Hg2+ from guava leaf extract.

Heavy and toxic metal ion removal by a novel polymeric ion-exchanger: synthesis, characterization, kinetics and equilibrium studies

2014 ◽  
Vol 90 (12) ◽  
pp. 2170-2179 ◽  
Author(s):  
Raja S. Azarudeen ◽  
Mohamed A. Riswan Ahamed ◽  
R. Subha ◽  
Abdul R. Burkanudeen
Keyword(s):  
Metal Ion ◽  
Toxic Metal ◽  
Ion Exchanger ◽  
Equilibrium Studies ◽  
Metal Ion Removal ◽  
Ion Removal

scholarly journals Study on the Effect of Cu (II) and Zn (II) on the Accumulation of Pb (II) from Soil to the Biomass of Vegetable

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Le Thi Thanh Tran ◽  
Le Van Luan ◽  
Tran Quang Hieu ◽  
Le Van Tan
Keyword(s):  
Growth And Development ◽  
Metal Ion ◽  
Toxic Metal ◽  
Industrial Processes ◽  
High Concentration ◽  
Metal Pollutants ◽  
Inhibition Effect ◽  
Copper And Zinc ◽  
Stems And Leaves ◽  
Effect Of Copper

Among soil pollutants, lead (Pb) is one of the toxic metal pollutants widely used in many industrial processes and occurs as a contaminant in environment. In this study, a field experiment was carried out to investigate the accumulation of lead from soil contaminated by this metal ion on the biomass of some vegetables, including spinach, lettuce, carrots, and potatoes. The results showed that lead was cumulative metal. Besides, the level of lead accumulation in soil of the studied vegetables decreased in the order of tubers of carrots, tubers of potato, spinach root, lettuce root, stems and leaves of spinach, stem and leaves of carrot, stems and leaves of potato, and stem and leaves of lettuce, respectively. Our investigations demonstrate the effect of copper and zinc micronutrient elements which play an important role in the growth and development of plants, on the accumulation of lead from contaminated soil of the studied vegetables. The obtained results showed that high concentration of copper and zinc in soil cause competition with lead in the process of absorption and accumulation in the plant. Specifically, copper and zinc showed the inhibition effect on the uptake and accumulation of lead by these plants.

Studies on the biofilm produced by Pseudomonas aeruginosa grown in different metal fatty acid salt media and its application in biodegradation of fatty acids and bioremediation of heavy metal ions

2017 ◽  
Vol 63 (1) ◽  
pp. 61-73 ◽  
Author(s):  
P. Abinaya Sindu ◽  
Pennathur Gautam
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Fatty Acid ◽  
Metal Ions ◽  
Metal Ion ◽  
High Performance ◽  
Toxic Metal ◽  
Industrial Effluents ◽  
Aquatic Organism ◽  
Fatty Acid Salt ◽  
Planktonic Form

Metal fatty acid salts (MFAS) in untreated industrial effluents cause environmental pollution. The use of biocompatible agents for remediation may help in reducing the harm caused to the ambient aquatic organism. Pseudomonas aeruginosa is a ubiquitous organism that thrives under harsh conditions and is resistant to toxic metal ions. The present study shows a proof-of-concept of using this organism in the biodegradation of MFAS. MFAS were prepared and we studied their effect on the growth of the planktonic form and the formation of biofilm by P. aeruginosa. We observed biofilm formation in the presence of all the MFAS when used as the sole carbon source, albeit the quantity of biofilm formed in the presence of cadmium and copper was less. There was no effect on the planktonic form of the organism but the formation of biofilm increased in the presence of magnesium palmitate. This study shows that metal ions play a pivotal role in the formation of biofilm. HPLC (high-performance liquid chromatography) analysis of the biofilm polysaccharide showed that hexose sugar was a major component when compared with pentose sugar. The structure of biofilm polysaccharide and the coordination of the metal ion with the biofilm polysaccharide were confirmed by FTIR (Fourier transform infrared spectroscopy) and Raman spectroscopy.

scholarly journals Selective Removal of Toxic Metals like Copper and Arsenic from Drinking Water Using Phenol-Formaldehyde Type Chelating Resins

2009 ◽  
Vol 6 (4) ◽  
pp. 1035-1046 ◽  
Author(s):  
Debasis Mohanty ◽  
Shashadhar Samal
Keyword(s):  
Drinking Water ◽  
Schiff Bases ◽  
Toxic Metals ◽  
Metal Ion ◽  
Phenol Formaldehyde ◽  
Low Cost ◽  
Arsenic Concentration ◽  
Copper Ion ◽  
Toxic Metal ◽  
Chelating Resins

The concentration of different toxic metals has increased beyond environmentally and ecologically permissible levels due to the increase in industrial activity. More than 100 million people of Bangladesh and West Bengal in India are affected by drinking ground water contaminated with arsenic and some parts of India is also affected by poisoning effect of copper, cadmium and fluoride. Different methods have been evolved to reduce the arsenic concentration in drinking water to a maximum permissible level of 10 μg/L where as various methods are also available to separate copper from drinking water. Of the proven methods available today, removal of arsenic by polymeric ion exchangers has been most effective. While chelating ion exchange resins having specific chelating groups attached to a polymer have found extensive use in sorption and pre concentration of Cu2+ions. Both the methods are coupled here to separate and preconcentrate toxic metal cation Cu2+and metal anion arsenate(AsO4–) at the same time. We have prepared a series of low-cost polymeric resins, which are very efficient in removing copper ion from drinking water and after coordinating with copper ion they act as polymeric ligand exchanger, which are efficiently removing arsenate from drinking water. For this purpose Schiff bases were prepared by condensingo-phenylenediamine witho-,m-, andp-hydroxybenzaldehydes. Condensing these phenolic Schiff bases with formaldehyde afforded the chelating resins in high yields. These resins are loaded with Cu2+, Ni2+2+, and Fe3+ions. The resins and the polychelates are highly insoluble in water. In powdered form the metal ion-loaded resins are found to very efficiently remove arsenate ion from water at neutral pH. Resins loaded with optimum amount of Cu2+ion is more effective in removing arsenate ions compared to those with Fe3+ion, apparently because Cu2+is a stronger Lewis acid than Fe3+. Various parameters influencing the removal of the arsenate ion from drinking water to a concentration level below 20 μg/L are studied.

scholarly journals Not Just Ionic Mimicry: Biophysics of Toxic Metal Ion Interactions with Peripheral Membrane Targets

2018 ◽  
Vol 114 (3) ◽  
pp. 33a
Author(s):  
Tatyana I. Igumenova ◽  
Taylor R. Cole ◽  
Sachin Katti ◽  
Krystal A. Morales ◽  
Samuel G. Erickson ◽  
...  
Keyword(s):  
Metal Ion ◽  
Toxic Metal ◽  
Ion Interactions ◽  
Metal Ion Interactions
Sign in / Sign up

Export Citation Format

Share Document