Simple apparatus for trace analysis of toxic heavy metals. Determination of cadmium and lead by manual d. c. polarography

1976 ◽  
Vol 66 (3-4) ◽  
pp. 253-263 ◽  
Author(s):  
Stephen A. K. Hsieh ◽  
Gerda J. K. Wong ◽  
T. S. Ma
Keyword(s):  
Heavy Metals ◽  
Trace Analysis ◽  
Toxic Heavy Metals ◽  
Simple Apparatus ◽  
Cadmium And Lead

Determination of Traces Heavy Metals from Solid Residues Formed by Combustion of Lignite in Relation to Degree of Accessibility in Soil and Plants

2017 ◽  
Vol 68 (10) ◽  
pp. 2363-2366
Author(s):  
Delia Nica Badea
Keyword(s):  
Heavy Metals ◽  
Power Plant ◽  
Thermal Power ◽  
Reference Value ◽  
Combustion Products ◽  
Toxic Heavy Metals ◽  
Area Of Influence ◽  
Risk Potential

The paper evaluates the presence and content of traces of heavy metals Hg, Pb, Ni, Cd (total forms) from coal and solid combustion products, the degree of transfer and accessibility in the area of influence of a lignite power plant. The content of toxic heavy metals in residues are characterized by RE Meiji [ 1 (Pb and Hg) and REMeij �1 (Ni and Cd) for the filter ash. Pb and Ni content in the soil exceeds normal values, and Pb exceeds and alert value for sensitive soils around the residue deposit (70.20 mg.Kg-1). The degree of accessibility of the metals in plants (TF), reported at the Khan reference value (0.5), indicates a significant bioaccumulation level for the metals: Cd (1.9) and Hg (0.6) inside the deposit; Cd (0.39) at the base of the deposit, Hg (0.8) in the area of the thermal power plant. The trace levels of heavy metals analyzed by GFAAS and CVAAS (Hg), indicates a moderate risk potential for food safety and quality of life in the studied area.

Novel Bioremediation Methods in Waste Management

2020 ◽  
pp. 1627-1643 ◽  
Author(s):  
Charu Gupta ◽  
Dhan Prakash
Keyword(s):  
Heavy Metals ◽  
Genetically Modified Organisms ◽  
Treatment Method ◽  
Toxic Heavy Metals ◽  
Novel Methods ◽  
Contaminated Waste ◽  
Oily Waste ◽  
Electro Coagulation ◽  
Cadmium And Lead ◽  
New Generation

Bioremediation technologies are one of the novel methods in the field of waste and environment management and are presently gaining immense credibility for being eco-compatible. Bioremediation using microbes has been well accepted as an environment friendly and economical treatment method for disposal of hazardous petroleum hydrocarbon contaminated waste (oily waste). Besides this, earthworms can be used to extract toxic heavy metals, including cadmium and lead, from solid waste from domestic refuse collection and waste from vegetable and flower markets. Other novel methods used recently for treatment of wastes are plasma incineration or plasma assisted gasification and pyrolysis technology. The technologies applied for conditioning include ultrasonic degradation, chemical degradation, enzyme addition, electro-coagulation and biological cell destruction. Genetic engineering is another method for improving bioremediation of heavy metals and organic pollutants. Transgenic plants and associated bacteria constitute a new generation of genetically modified organisms for bioremediation.

Novel Bioremediation Methods in Waste Management

2016 ◽  
pp. 141-157 ◽  
Author(s):  
Charu Gupta ◽  
Dhan Prakash
Keyword(s):  
Heavy Metals ◽  
Genetically Modified Organisms ◽  
Treatment Method ◽  
Toxic Heavy Metals ◽  
Novel Methods ◽  
Contaminated Waste ◽  
Oily Waste ◽  
Electro Coagulation ◽  
Cadmium And Lead ◽  
New Generation

Bioremediation technologies are one of the novel methods in the field of waste and environment management and are presently gaining immense credibility for being eco-compatible. Bioremediation using microbes has been well accepted as an environment friendly and economical treatment method for disposal of hazardous petroleum hydrocarbon contaminated waste (oily waste). Besides this, earthworms can be used to extract toxic heavy metals, including cadmium and lead, from solid waste from domestic refuse collection and waste from vegetable and flower markets. Other novel methods used recently for treatment of wastes are plasma incineration or plasma assisted gasification and pyrolysis technology. The technologies applied for conditioning include ultrasonic degradation, chemical degradation, enzyme addition, electro-coagulation and biological cell destruction. Genetic engineering is another method for improving bioremediation of heavy metals and organic pollutants. Transgenic plants and associated bacteria constitute a new generation of genetically modified organisms for bioremediation.

Determination of toxic heavy metals in indigenous medicinal plants used in Rawalpindi and Islamabad cities, Pakistan

2013 ◽  
Vol 148 (1) ◽  
pp. 158-164 ◽  
Author(s):  
Adeel Mahmood ◽  
Sadia Rashid ◽  
Riffat Naseem Malik
Keyword(s):  
Heavy Metals ◽  
Medicinal Plants ◽  
Toxic Heavy Metals

Determination of toxic heavy metals in Echinodermata and Chordata species from South Korea

2014 ◽  
Vol 7 (4) ◽  
pp. 295-301 ◽  
Author(s):  
Ji Yeon Choi ◽  
Girum Habte ◽  
Naeem Khan ◽  
Eun Yeong Nho ◽  
Joon Ho Hong ◽  
...  
Keyword(s):  
Heavy Metals ◽  
South Korea ◽  
Toxic Heavy Metals

scholarly journals Use of Multiwalled Carbon Nanotube Disks for the SPE of Some Heavy Metals as 8-Hydroxquinoline Complexes

2011 ◽  
Vol 94 (4) ◽  
pp. 1297-1303 ◽  
Author(s):  
Mustafa Soylak ◽  
Yunus Emre Unsal
Keyword(s):  
Heavy Metals ◽  
Carbon Nanotube ◽  
Bovine Liver ◽  
Sample Volume ◽  
Multiwalled Carbon Nanotube ◽  
Separation System ◽  
Toxic Heavy Metals ◽  
Multiwalled Carbon ◽  
Humber River

Abstract A multiwalled carbon nanotube disk was used for the SPE of some toxic heavy metals from environmental samples. Metal ions were adsorbed on the disk as 8-hydroxquinoline complexes, then quantitatively desorbed from the disk by using 10 mL 2 M HNO3. The effects of analytical parameters, including pH, sample volume, and flow rates, on the recoveries of Cd(II), Co(II), Ni(II), Pb(II), Fe(III), Cu(II), and Zn(II) were investigated. The influences of some 1A and 2A group elements and some other ions as concomitant ions on the recoveries of analyte ions were also examined. The LODs of the presented preconcentration-separation system for the analyte ions were found to be in the range of 1.0–5.2 µg/L. In order to validate the procedure, SRM 1577B Bovine Liver, IAEA 336 Lichen, and HR-1 Humber river sediment certifed reference materials were analyzed. The proposed method has been applied to the determination of understudy elements in some pharmaceutical samples and natural water samples from different sites in Turkey.

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