scholarly journals The binary, ternary and quaternary mixture toxicity of benzo[a]pyrene, arsenic, cadmium and lead in HepG2 cells

2016 ◽  
Vol 5 (2) ◽  
pp. 703-713 ◽  
Author(s):  
Sasikumar Muthusamy ◽  
Cheng Peng ◽  
Jack C. Ng
Keyword(s):  
Heavy Metal ◽  
Hepg2 Cells ◽  
Combination Index ◽  
Mixture Toxicity ◽  
Quaternary Mixture ◽  
Cadmium And Lead

The toxicity of multi-component mixtures of B[a]P and heavy metal/loid(s) was determined in HepG2 cells. Concentration dependent synergism, additivity or antagonism was predicted by the combination-index isobologram method.

scholarly journals Deciphering lead and cadmium stripping peaks for porous antimony deposited electrodes

2016 ◽  
Vol 34 (2) ◽  
pp. 233-241 ◽  
Author(s):  
Aqeel Ahmad Taimoor
Keyword(s):  
Heavy Metal ◽  
Photoelectron Spectroscopy ◽  
Metal Ion ◽  
Porous Electrodes ◽  
Electrochemical Sensing ◽  
Ex Situ ◽  
Electrochemical Tests ◽  
Diffusion Limitations ◽  
Lead And Cadmium ◽  
Cadmium And Lead

AbstractCadmium and lead are generally taken as model heavy metal ions in water to scale the detection limit of various electrode sensors, using electrochemical sensing techniques. These ions interact with the electrochemically deposited antimony electrodes depending on the diffusion limitations. The phenomenon acts differently for the in-situ and ex-situ deposition as well as for porous and non-porous electrodes. A method has been adopted in this study to discourage the stripping and deposition of the working ions (antimony) to understand the principle of heavy metal ion detection. X-ray photoelectron spectroscopy (XPS) technique was used to establish the interaction between the working and dissolved ions. In addition to the distinct peaks for each analyte, researchers also observed a shoulder peak. A possible reason for the presence of this peak was provided. Different electrochemical tests were performed to ascertain the theory on the basis of the experimental observations.

Arsenic, cadmium, and lead contents of rice imported into Qatar-impact on intake

2019 ◽  
Vol 122 (1) ◽  
pp. 99-106 ◽  
Author(s):  
Tahra Elobeid ◽  
Vijay Ganji ◽  
Khloud Moustafa ◽  
Fatima Mohammed ◽  
Loujain El-Ouzi ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Middle Eastern ◽  
Population Based ◽  
Arsenic Content ◽  
Content Type ◽  
The Usa ◽  
Rice Consumption ◽  
Rice Samples ◽  
Cadmium And Lead ◽  
The Uk

Purpose The purpose of this paper is to determine arsenic, cadmium and lead contents of rice imports and to estimate their impact on these heavy metal intakes in Qatar. Design/methodology/approach In total, 30 rice samples imported from various countries (Vietnam, Thailand, India, Pakistan, the USA, Australia, the UK and Lebanon) were analyzed for arsenic, cadmium and lead contents with plasma optical spectrometer. These heavy metal intakes from rice were estimated for Qatar population based on the per capita consumption of rice as per 2018 rice consumption data. Findings In all rice samples, mean concentrations of arsenic, cadmium and lead were 1.11 mg/kg, 19.7 µg/kg and 131.3 µg/kg, respectively. Average arsenic, cadmium and lead contents were the highest in rice imported from Thailand (1.25 mg/kg), Vietnam (30 µg/kg) and India (178.3 µg/kg), respectively. Estimated arsenic, cadmium and lead intakes through rice consumption by Qatari population were 225.7, 4 and 26.7 µg/day, respectively. Originality/value In all rice imports, arsenic content is approximately 5.5 times higher than the maximum allowable concentration (MAC), whereas the cadmium and lead levels are within the MAC. Because these heavy metals are linked to health, all Middle Eastern countries that import rice from Thailand, Vietnam and India should monitor the metal contents in their food supply on a regular basis.

Heavy metal adsorption changes of EAF steel slag after phosphorus adsorption

2012 ◽  
Vol 65 (9) ◽  
pp. 1570-1576 ◽  
Author(s):  
Guanling Song ◽  
Lijing Cao ◽  
Xiao Chen ◽  
Wenhua Hou ◽  
Qunhui Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ion ◽  
Steel Slag ◽  
Ion Concentration ◽  
Metal Adsorption ◽  
Heavy Metal Ion ◽  
Heavy Metal Adsorption ◽  
Isothermal Adsorption ◽  
Phosphorus Adsorption ◽  
Cadmium And Lead

A kind of electric arc furnace (EAF) steel slag was phosphated, and its isothermal and dynamic adsorptions of copper, cadmium, and lead ions were measured to determine if heavy metal adsorption changes after phosphorus adsorption. The surface area increased greatly after the slag was phosphated. Isothermal adsorption experiments showed that the theoretical Qmax of the EAF steel slag on Cu2+, Cd2+, and Pb2+ improved 59, 50, and 89% respectively after it was phosphated. Dynamic adsorption results showed that the greatest adsorption capacities of unit volume of Cu2+, Cd2+, and Pb2+ were 2.2, 1.8, and 1.8 times that of the column packed with original EAF steel slag when the column was packed with phosphate EAF steel slag at the same heavy metal ion concentration. The breakthrough time, the exhaustion time and elution efficiency of the column also increased when the column was packed with phosphated EAF steel slag compared with that packed with original EAF steel slag. Phosphorus adsorption could further improve the heavy metal ion adsorption of the EAF steel slag.

Heavy metal contents of soils and plants adjacent to the Hume Highway near Marulan, New South Wales

1975 ◽  
Vol 15 (74) ◽  
pp. 414 ◽  
Author(s):  
DJ David ◽  
CH Williams
Keyword(s):  
Heavy Metal ◽  
Zinc Oxide ◽  
Heavy Metal Contamination ◽  
New South ◽  
Health Hazard ◽  
The United States ◽  
South Wales ◽  
Metal Contents ◽  
Cadmium And Lead ◽  
Relative Purity

HCL-extractable zinc, lead, cadmium and copper in soils as well as concentrations of these elements in bracken (Pteridium esculentum) were found to decrease along four leeward traverses at right angles to the Hume Highway near Marulan. Similar results were obtained for the above-ground portions of rye corn (Secale cereale) grown in a glasshouse on soils collected along one of these traverses. Zinc accession is similar to, but cadmium and lead accessions are considerably lower than, those observed by other workers in the United States probably owing in the case of cadmium to the use of purer zinc oxide in Australian tyre manufacture and in the case of lead to smaller cars and a smaller proportion of vehicles operating on leaded fuel. Zinc and cadmium analyses of Australian and foreign tyres confirmed the relative purity of the zinc oxide used in the manufacture of tyres in Australia. No serious health hazard appears to arise from heavy metal contamination of roadside soils and vegetation by vehicular traffic on the Hume Highway.

scholarly journals The Potential of Microbial Fuel Cells for Remediation of Heavy Metals from Soil and Water—Review of Application

2019 ◽  
Vol 7 (12) ◽  
pp. 697 ◽  
Author(s):  
Chaolin Fang ◽  
Varenyam Achal
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Microbial Fuel Cells ◽  
Electrode Materials ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
External Energy ◽  
Microbial Electrolysis Cells ◽  
Cadmium And Lead ◽  
Soil And Water

The global energy crisis and heavy metal pollution are the common problems of the world. It is noted that the microbial fuel cell (MFC) has been developed as a promising technique for sustainable energy production and simultaneously coupled with the remediation of heavy metals from water and soil. This paper reviewed the performances of MFCs for heavy metal removal from soil and water. Electrochemical and microbial biocatalytic reactions synergistically resulted in power generation and the high removal efficiencies of several heavy metals in wastewater, such as copper, hexavalent chromium, mercury, silver, thallium. The coupling system of MFCs and microbial electrolysis cells (MECs) successfully reduced cadmium and lead without external energy input. Moreover, the effects of pH and electrode materials on the MFCs in water were discussed. In addition, the remediation of heavy metal-contaminated soil by MFCs were summarized, noting that plant-MFC performed very well in the heavy metal removal.

scholarly journals Biotoxicity of heavy metal salts to Bacillus subtilis and their sorption properties

2020 ◽  
Vol 157 ◽  
pp. 02012
Author(s):  
Aleksey Sizentcov ◽  
Elena Sal’nikova ◽  
Elena Barysheva ◽  
Yaroslav Sizentcov ◽  
Veronika Sal’nikova
Keyword(s):  
Heavy Metal ◽  
Bacillus Subtilis ◽  
Strain Differences ◽  
Scientific Development ◽  
Biological Origin ◽  
Metal Compounds ◽  
Zinc Cadmium ◽  
Probiotic Strains ◽  
Cadmium And Lead ◽  
High Level

The prospect of the use of microorganisms in medical and veterinary practice at the present stage of scientific development has high potential based on natural mechanisms of protection and adaptation of organisms to the effects of adverse factors. The biological adaptation potential of microorganisms to the effects of heavy metals found its practical application in studies of soil and water bioremediation. Based on the above, we set the aim to assess inhibitory characteristics of various heavy metal compounds, the extent of their impact on the growth of populations of probiotic strains Bacillus subtilis, and to study biosorption criteria of the strains. To achieve this aim, we used isolated cultures of probiotic strains B. subtilis 534 and B. subtilis 10641 extracted from drugs Sporobacterin and Vetom 1.1, respectively. Various chemical compounds of iron, copper, zinc, cadmium, and lead with a various anion component were used as growth inhibitors in the study. The criterion for the selection of compounds was a high level of their dissociation in water solutions. Data presented in this work experimentally confirm the capability of using probiotic strains in ecosystems of biological origin. A comparison of two strains of Bacillus subtilis showed a high level of resistance to xenobiotic elements with strain differences in the studied microorganism. The B. subtilis 534 strain revealed a higher level of resistance to compounds with a direct correlation between the inhibitory characteristics of the elements and the level of element sorption from the nutrient substrate.

Stabilization of Heavy Metal Containing Smelting Ash through Mechano-Chemical Reaction

2015 ◽  
Vol 768 ◽  
pp. 62-69 ◽  
Author(s):  
Mi Wang ◽  
Xiao Bo Min ◽  
Yan Jie Liang ◽  
Li Yuan Chai ◽  
Jian Qiang Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Optimal Condition ◽  
Ball Milling ◽  
Chemical Reaction ◽  
Milling Time ◽  
Elemental Sulfur ◽  
Extraction Procedure ◽  
Leaching Toxicity ◽  
Milling Medium ◽  
Cadmium And Lead

The present study described the application of mechano-chemical reaction on stabilization of heavy metal containing smelting ash. Extraction procedure for leaching toxicity test showed that the leaching toxicity of cadmium and lead in smelting ash decreased very significantly after grinded. The optimal condition of the mechano-chemical stabilization process was established as follow. The ball milling medium was stainless steel, the additive was the mixture of elemental sulfur and iron powder, the dosage of additive was n(Cd):n(Fe):n(S)=1:3:3, and ball milling time was 3.5 hour. The results showed that the leaching toxicity of cadmium decreased from 2496 mg/L to 0.43 mg/L, compared to lead decreased from 7.30 mg/L to 0.12mg/L under the optimal condition.

scholarly journals Activation of phenylpropanoid pathway in legume plants exposed to heavy metals. Part II. Profiling of isoflavonoids and their glycoconjugates induced in roots of lupine (Lupinus luteus) seedlings treated with cadmium and lead.

2011 ◽  
Vol 58 (2) ◽  
Author(s):  
Sylwia Pawlak-Sprada ◽  
Maciej Stobiecki ◽  
Joanna Deckert
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Heavy Metal Stress ◽  
Phenylpropanoid Pathway ◽  
Metal Stress ◽  
Lupinus Luteus ◽  
Response To Treatment ◽  
Positional Isomers ◽  
Root Extracts ◽  
Cadmium And Lead

We examined changes in profiles of isoflavonoids in roots of lupine (Lupinus luteus L. cv. Juno) seedlings in response to treatment with two heavy metals: cadmium (at 10 mg/l) and lead (at 150 mg/l). Overall, 21 flavonoid conjugates were identified in root extracts, some of them with up to six positional isomers. The total amount of all isoflavonoids increased by about 15 % in cadmium-treated plants and by 46 % in lead-treated ones. Heavy metals markedly increased the content of two compounds: 2'-hydroxygenistein glucoside and 2'-hydroxygenistein 7-O-glucoside malonylated. Possible functions of the identified isoflavonoids in yellow lupine exposed to heavy metal stress are discussed.

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