Mixed bacteria-loaded biochar for the immobilization of arsenic, lead, and cadmium in a polluted soil system: Effects and mechanisms

The thermomechanical transport approach includes the process of diffusing or the condition of being diffused, absorption/desorption, swell/shrink, equilibrium/nonequilibrium, and thermomechanical transport of contaminant in three phases of polluted mining soil which are discussed. The thermomechanical transport model of the contaminants transport in polluted soil is established, and its basic equations are given. Based on that, the distribution regularities of the contaminant seepage in water-soil system are discussed in detail and the sensitivities of parameters are analyzed. The study shows that the parameter has important influence on the contamination distribution and transportation in polluted soil-water system. The influence degree is also related to the action of seepage force directly.

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Influence of slightly reducing conditions on the solubility of lead and cadmium in a polluted soil

Groundwater 2000 ◽

10.1201/9781003078593-91 ◽

2020 ◽

pp. 183-184

Author(s):

M.A.M. Kedziorek ◽

A.C.M. Bourg ◽

M. Davranche

Keyword(s):

Polluted Soil ◽

Lead And Cadmium ◽

Reducing Conditions

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Research on Effect of Copper on Chlorophytum Comosum-Soil System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.2727 ◽

2011 ◽

Vol 255-260 ◽

pp. 2727-2730

Author(s):

You Bao Wang ◽

Nan Nan Wang ◽

Dan Wu

Keyword(s):

Electrical Conductivity ◽

Contaminated Soils ◽

Transport Mechanism ◽

Polluted Soil ◽

Ornamental Plant ◽

Soil System ◽

Significant Difference ◽

Chlorophytum Comosum ◽

Effect Of Copper ◽

Translocation Factors

In this study, Chlorophytum comosum was used to restore the artificially polluted soil by pot-planting. The results showed that the sensitivity of soil enzymatic activities was ranked as follows: urease > invertase > phosphatase > catalase, as their activities were only 25.71%, 33.33%, 37.88% and 55.49% compared to CK. The electrical conductivity (EC) value of soil increased from 98.3 to 608.7 µs·cm-1with the increase of copper (Cu) concentration in soil, but the organic matter had no significant difference between different treatments. The bioaccumulation coefficients (BC) and translocation factors (TF) value of C. comosum were both above 0.5 when Cu concentration in soil was up to 500mg·kg-1, which indicated that there might be an excellent and transport mechanism in C. comosum. In conclusion, C. comosum is a potential ornamental plant in recovering Cu-contaminated soils.

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ENRICHMENT FACTORS OF HEAVY METALS IN IRON - MANGANESE CONCRETIONS FROM IMPERFECTLY DRAINED SOILS

Bulletin of the Geological Society of Greece ◽

10.12681/bgsg.16596 ◽

2018 ◽

Vol 36 (1) ◽

pp. 158 ◽

Cited By ~ 1

Author(s):

Δ. Γασπαράτος ◽

Κ. Χαϊντούτη ◽

Δ. Ταρενίδης ◽

Α. Τσαγκαλίδης

Keyword(s):

Heavy Metals ◽

Manganese Oxides ◽

Enrichment Factors ◽

Soil System ◽

Charged Surfaces ◽

Lead And Cadmium ◽

Reducing Conditions ◽

Iron Manganese ◽

Mn Oxides ◽

Iron And Manganese

The Fe-Mn concretions are morphological features of soils under alternating oxidizing and reducing conditions. They have a high adsorption capacity for many inorganic pollutants, like heavy metals. This study determines the enrichment factors of Fe, Μη, Ni, Co, Pb and Cd in Fe-Mn concretions collected from imperfectly -drained soils in Central Greece. The data show that the concretions absorbed significant amounts of heavy metals and especially of lead and cadmium from the soil system. According to the enrichment factors, the affinity of heavy metals for the concretions due to the charged surfaces of iron and manganese oxides, follow the order Pb>Cd>Mn>Co>Ni>Fe. McKenzie (1980) also found adsorption of cobalt, manganese, nickel and lead at the same order on nine synthetic manganese oxides while Nimfopoulos et al. (1997) showed that the mobility of the metals at karst cavities enriched with Mn oxides followed the order Na>K>Mg>Sr>Mn>As>Zn>Ba>AI>Fe>Cu>Cd>Pb.

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Biosorption Potentials of Pleurotus tuber-regium (Fr.) Sing in Lead and Cadmium Polluted Soil

10.54117/jpmesc.v1i1.1 ◽

2022 ◽

Vol 1 (1) ◽

pp. 1-3

Author(s):

O.C.U. Adumanya ◽

◽

B.C. Onwubuche ◽

S.A. Nwinee ◽

G.A. Umensofor ◽

...

Keyword(s):

Lead Concentration ◽

Environmental Pollutants ◽

Polluted Soil ◽

Soil Samples ◽

Distilled Water ◽

Intrinsic Properties ◽

Lead And Cadmium ◽

Ad Libitum ◽

Dose Dependent ◽

Humus Soil

Background/Aim: The heavy metals, cadmium (Cd) and lead (Pb), are often implicated as environmental pollutants. Therefore, the biosorption potential of Pleurotus tuber-regium in lead and cadmium polluted soil was investigated by this work. Methods: Four kilograms of each humus soil sample was weighed into eight different black nursery cellophane bags and polluted with 0.5 g, 1.0 g and 2.0 g of lead and cadmium in triplicate. Pleurotus sclerotia were then planted in these polluted soil samples, and distilled water was added ad libitum. Results: The results showed that the growth performance was dose-related in lead-polluted soil. The Pleurotus tuber regium mushroom in the lead-polluted soil samples indicated a dose-dependent absorbed lead concentration in the results. Cadmium-polluted soil samples did not support the growth of the Pleurotus tuber regium mushroom at the various concentrations of cadmium used after day 30. Therefore, the findings suggest that the Pleurotus tuber regium mushroom and its sclerotia have intrinsic properties for the absorption of lead and cadmium. Conclusion: The findings suggest that the Pleurotus tuber regium mushroom and its sclerotia have intrinsic properties for the absorption of lead and cadmium.

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Characterization of lead-bearing phases in municipal waste combustor fly ash

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100165045 ◽

1996 ◽

Vol 54 ◽

pp. 516-517

Author(s):

L. L. Sutter ◽

G. R. Dewey ◽

J. F. Sandell

Keyword(s):

Fly Ash ◽

Bottom Ash ◽

Municipal Waste ◽

Primary Concern ◽

Leaching Behavior ◽

Waste Combustion ◽

Lead And Cadmium ◽

Lead Speciation ◽

Accepted Practice

Municipal waste combustion typically involves both energy recovery as well as volume reduction of municipal solid waste prior to landfilling. However, due to environmental concerns, municipal waste combustion (MWC) has not been a widely accepted practice. A primary concern is the leaching behavior of MWC ash when it is stored in a landfill. The ash consists of a finely divided fly ash fraction (10% by volume) and a coarser bottom ash (90% by volume). Typically, MWC fly ash fails tests used to evaluate leaching behavior due to high amounts of soluble lead and cadmium species. The focus of this study was to identify specific lead bearing phases in MWC fly ash. Detailed information regarding lead speciation is necessary to completely understand the leaching behavior of MWC ash.

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Polymorphism of p-450 cytochrome detoxication genes in adolescents depending on the degree of contamination of the organism by heavy metals

Hygiene and Sanitation ◽

10.33029/0016-9900-2020-99-5-478-482 ◽

2020 ◽

Vol 99 (5) ◽

pp. 478-482

Author(s):

N. P. Setko ◽

A. G. Setko ◽

Ekaterina V. Bulycheva ◽

A. V. Tyurin ◽

E. Yu. Kalinina

Keyword(s):

Heavy Metals ◽

Environmental Factors ◽

Heavy Metal Contamination ◽

Atomic Absorption Spectrophotometry ◽

The Body ◽

Lead And Cadmium ◽

Cyp2b6 Gene ◽

Cytochrome P 450 ◽

Gene Cyp1a1 ◽

Group 1

Introduction. Changes in the body of children and adolescents aimed at adapting to environmental factors are determined by genetic polymorphism in xenobiotic biotransformation genes, determining the degree of susceptibility of the child’s body to pollutants, which is the basis of modern personalized preventive medicine when managing risks to the health of the child population under the influence of environmental factors. Material and methods. Trace elements, including heavy metals, lead and cadmium, were determined in the hair of 256 practically healthy teenagers by atomic absorption spectrophotometry. Depending on the level of content of the latter, two groups of adolescents were formed to determine six genes of the cytochrome P-450 family. Group 1 consisted of adolescents whose cadmium lead content exceeded the average Russian indices. The second group included adolescents whose heavy metals were above the level of average Russian standards. Results. Studies have shown that in adolescents of the 1st group, compared with the data of adolescents of the 2nd group, an increase in the number of carriers of two mutant alleles at the locus rs 1048943 (gene CYP1A1) is 3.08 times, rs 464621 (gene CYP1A1) is 1. 8 times; locus rs 2069522 (CYP1A2 gene) 3.63 times; locus rs 1799853 (CYP2C9 * 2 gene) 4.5 times; locus rs 1057910 (gene CYP2C9 * 3) 3.8 times and locus rs 2279343 (gene CYP2B6) 4.25 times. Moreover, carriers of two normal alleles in adolescents of the first group at the locus rs 1048943 (gene CYP1A1) were 5.14 times; locus rs 2279343 (CYP2B6 gene) was 6.5 fold less than among adolescents of the 2nd group; and at the locus rs 464621 (gene CYP1A1), rs 2069522 (gene CYP1A2), rs 1799853 (gene CYP2C9 * 2), rs 1057910 (gene CYP2C9 * 3) there were no carriers of normal homozygotes. Conclusion. Group 1 adolescents with heavy metal contamination of the body are carriers significantly in a greater number of pathological mutations in the genes of the cytochrome P-450 detoxification system in comparison with data from group 2 adolescents.

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Determination of Some Heavy Metals in Milk of Cow Grazing At Selected Areas, of Kaduna Metropolis

International Journal of Advanced Research in Computer Science and Software Engineering ◽

10.23956/ijarcsse/v7i6/01617 ◽

2017 ◽

Vol 7 (7) ◽

pp. 341 ◽

Cited By ~ 1

Author(s):

Mahmud Mohammed Imam ◽

Zahra Muhammad ◽

Amina Zakari

Keyword(s):

Heavy Metals ◽

Cadmium Toxicity ◽

Research Work ◽

The Body ◽

Cow Milk ◽

Scientific Model ◽

Potential Health ◽

Milk Samples ◽

Lead And Cadmium ◽

Digestion Technique

In this research work the concentration of zinc, copper, lead, chromium, cadmium, and nickel in cow milk samples obtained from four different grazing areas (kakuri, kudendan, malali, kawo) of Kaduna metropolis. The samples were digested by wet digestion technique .The trace element were determined using bulk scientific model VPG 210 model Atomic Absorption Spectrophotometer (AAS).. The concentration of the determined heavy metal were The result revealed that Cr, Ni and Cd were not detected in milk samples from Kawo, Malali and Kudendan whereas lead (Pb) is detected in all samples and found to be above the stipulated limits of recommended dietary allowance (NRC,1989) given as 0.02mg/day. Cu and Zn are essential elements needed by the body for proper metabolism and as such their deficiency or excess is very dangerous for human health. However, they were found in all samples and are within the recommended limits while Cd (2.13 – 3.15 mg/kg) in milk samples from Kakuri was found to be above such limit (0.5mg/day). Cow milk samples analyzed for heavy metals in this research work pose a threat of lead and cadmium toxicity due to their exposure to direct sources of air, water and plants in these grazing areas, thereby, resulting to a potential health risk to the consumers.

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