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Assessment of the metal pollution in surface sediments of

2020-11-5  The determined mean metal concentrations were as follows: Al 49,772 mg/kg, Zn 84.40 mg/kg, Cr 83.70 mg/kg, V 76.45 mg/kg, Ni 42.53 mg/kg, Cu 34.27 mg/kg, Pb 26.30 mg/kg, As 12.49 mg/kg, and Hg 0.06 mg/kg. The metals in the surface sediments of Tasaul Lake displayed moderate spatial variation, with higher metal concentrations mainly occurring in

Heavy metal content and toxicity of mine and quarry soils

2016-1-27  The metal concentrations in the quarry soils from the different areas are highly variable, especially Cr pseudo-total contents (Table 2); this is related to the occurrence of metal ores, whose accumulations depend on natural and anthropogenic factors, like historical quarrying, as well as on how the waste was deposited, among other factors.

Accumulation and bioconcentration of heavy metals in two

The build-up of heavy metals (HM) in agricultural soils accelerates the HM uptake by plants, which could potentially affect food quality and food safety. Here we studied the status and bioaccumulation of HM from soils to plant parts (roots, stem, and grains) in Usangu agro-ecosystem-Tanzania. In tot

Concentration and distribution of twelve metals in Central

2011-4-1  The median concentrations (mg kg −1) were: Ba 227, Cd 0.32, Cr 25, Cu 20.3, Ni 23.6, Pb 19.7, Sr 73.7, V 50.2, Zn 72.2, Al 22214, Fe 21754 and Mn 463. The highest median of Ba, Cr, Cu, Ni, Sr, V, Al, Fe and Mn are in soils formed from lutites and those of Cd, Pb and Zn to soils derived from limestones. The soils formed from sandstones have

Toxic and heavy metals contamination assessment in soil

2021-8-20  The mean concentration of Hg in both soil and water samples was found under the standard limit set by WHO (soil: 0.08 mg kg −1, water: 0.006 mg L −1) but

Toxicology of Heavy Metals to Subsurface Lithofacies and

2020-4-9  The mean concentration of Aluminium (512 mg/kg), Zinc (245 mg/kg), Nickel (205 mg/kg), and Lead (179 mg/kg) are significant when compared to five

Heavy metals immobilization and improvement in maize

2021-9-16  The concentration of Pb, Cd and Cr in shoot were decreased from 2.58, 1.95 and 2.95 mg kg −1 (control) to 0.76, 0.72 and 0.64 mg kg −1 at 4% biochar. The data shows that the highest reduction

Metal and metalloids concentration in Galapagos fish liver

2021-12-1  However, the Zn concentrations of A. solandri and T. albacares (48.0 mg/kg w.w) obtained in this study were lower than those obtained by Sadeghi et al. (2020) in the Oman Sea, in which concentrations of 239.5 mg of Zn/kg w.w were observed in the liver of T. albacares. Due to the lack of information on the dose-response relationship for Zn in

Concentration of heavy metals in vegetables and potential

2017-2-13  Hg concentrations ranged from 0 to 0.447 mg/kg, with an average of 0.008 mg/kg. Among the three metals, Pb showed a higher accumulation in vegetables than Cd and Hg. Although the maximum of Pb, Cd, and Hg we collected were much higher than their MAC, respectively, the averages of the three metals were lower than the MACs.

Heavy metals immobilization and improvement in maize

2021-9-16  The concentration of Pb, Cd and Cr in shoot were decreased from 2.58, 1.95 and 2.95 mg kg −1 (control) to 0.76, 0.72 and 0.64 mg kg −1 at 4% biochar. The data shows that the highest reduction

Using phosphate rock to immobilize metals in soil and

This greenhouse experiment evaluated the effects of phosphate rock (PR) on arsenic and metal uptake by the arsenic hyperaccumulator Pteris vittata in a soil spiked with arsenic and heavy metals Cd, Pb and Zn. Five soil treatments were used, 1) control with no arsenic, 2) spiked with 50 mg kg(-1) As

Heavy Metals Concentration in Water, Sediments and

2015-11-6  marginalis, a fresh water bivalve, the concentration of Ni, Pb, Cd, Cr and Cu varied seasonally from 6.07-11.32, 7.03-59.21, 0.56-7.23, 9.38-501.11 and 7.55-183.87 mg/kg, respectively. The concentrations of all the heavy metals studied were much higher in mussel than those of fish that indicate the greater rate of bioaccumulation in mollusc.

Concentration and distribution of twelve metals in Central

2011-4-1  The median concentrations (mg kg −1) were: Ba 227, Cd 0.32, Cr 25, Cu 20.3, Ni 23.6, Pb 19.7, Sr 73.7, V 50.2, Zn 72.2, Al 22214, Fe 21754 and Mn 463. The highest median of Ba, Cr, Cu, Ni, Sr, V, Al, Fe and Mn are in soils formed from lutites and those of Cd, Pb and Zn to soils derived from limestones. The soils formed from sandstones have

Soil characterization and heavy metal pollution assessment

2019-3-15  Soil pollution negatively impacts on food safety and human health. The main aim of this work is to determine the As, Cd, Cr, Cu, and Pb concentrations in Orabi farms, El Obour city, Egypt. The contamination of soil with these metals was assessed by contamination factors (CF), degree of contamination (DC), pollution load index (PLI), ecological risk factor (Er), potential ecological risk index

Heavy Metal Pollution from Gold Mines: Environmental

2016-10-26  Its concentration in unpolluted soil is usually 1 mg/kg,but in gold mine tailings, concentrations ranging between 6.4 and 11.7 mg/kg have been reported in Tanzania . It occurs in gold bearing orebodies as an isometric trace element in sphalerite and its concentration depends on the concentration of the sphalerite in the ore body.

The assessment of cadmium, chromium, copper, and nickel

2019-4-4  Of all the metals reported in this study, Ni showed higher accumulation in T. qataranse tissues, with a concentration of 63.3 and 17.4 mg/kg in the root and shoot, respectively (Fig. 2).

Heavy Metal Residues in Soil and Accumulation in Maize at

In addition, the changes in the metal concentrations showed a strong temporal character. The highest mean concentration of Cr in the soil was 12.05 mg/kg, which occurred in September, and the lowest mean concentration was 11.12 mg/kg, which occurred in June. Soil Cr plays important roles in the metabolism of cholesterol, fat, and glucose.

Spatial distribution and risk assessment of metals in

2016-12-15  The highest Cd concentrations were measured in the north-eastern part of the Czech Republic (values above 0.3 mg/kg with a maximum of 7.2 mg/kg) and resulted from a combination of emissions from coal power plants (in the highly industrialized Upper Silesian Basin) and Mesozoic parent rock types folded during the Alpine Orogeny (sandstone, schists).

Occurrence of metals in vegetables and fruits from areas

2018-9-11  In Additional file 1: Tables S5, S6 and S7 are shown the metal concentrations expressed in mg kg − 1 wet weight on samples collected from fields, whereas in Additional file 1: Tables S8, S9, S10, S11 and S12 on samples collected from local markets.. Regulation (EC) n. 1881/2006 (OJ L 364 2006) sets maximum levels for lead and cadmium in vegetable products for human foodstuffs (Additional

HEAVY METALS IN FERTILISERS AND AGRICULTURE

2017-8-17  FOOD mg/kg Cd Kidney * 2.5 Liver * 1.25 Peanuts 0.5 Leafy vegetables, root and tuber vegetables, wheat, rice. 0.1 Meat (excluding offal) *, 0.05 * Cattle, sheep, pig. 5.2 Lead Violations of the MLs for lead in farm produce are rare. Apart from that present at

Heavy Metals Concentration in Water, Sediments and

2015-11-6  marginalis, a fresh water bivalve, the concentration of Ni, Pb, Cd, Cr and Cu varied seasonally from 6.07-11.32, 7.03-59.21, 0.56-7.23, 9.38-501.11 and 7.55-183.87 mg/kg, respectively. The concentrations of all the heavy metals studied were much higher in mussel than those of fish that indicate the greater rate of bioaccumulation in mollusc.

Presented by Wilbur Mayorga, M.S.,P.E., Chief

2014-5-1  Arsenic (mg/kg) Phase II Data Parks All Data 0 20 40 60 80. Arsenic Distribution South of Kendall (6 to 24 Arsenic (mg/kg) All Data Parks Phase II Data 0 10 20 30 40. Kruskal-Wallis test Test statistic = 6.2672 P-Value = 0.043 Since the P-value is less than 0.05, there is a statistically significant difference amongst the medians at

Copper, zinc, manganese, cadmium and chromium in crabs

2019-1-1  Metal concentrations in sediment samples were 65–91, 212–247, 506–1256, 0.6–1.3, and 8.8–14 mg/kg dry weight for Cu, Zn, Mn, Cd and Cr, respectively. The spatial heterogeneity of these metals in mangrove sediments was observed with a descendant order of metal concentrations as Mn > Zn > Cu > Cr > Cd at each site.

4.9 Hazards and Hazardous Materials

2021-2-18  Trace Metal Concentrations The results of sampling and analysis of rock/gravel samples representative of the onsite geologic materials (i.e., greywacke, greenstone, limestone, and fill materials) for the presence of trace metals are presented in Section 4.7, Geology, Soils and Seismicity, Table 4.7-3. Potential impacts

The assessment of cadmium, chromium, copper, and nickel

2019-4-4  Of all the metals reported in this study, Ni showed higher accumulation in T. qataranse tissues, with a concentration of 63.3 and 17.4 mg/kg in the root and shoot, respectively (Fig. 2).

Concentrations and sources of heavy metals in shallow

2020-7-16  The concentrations and sources of heavy metals in shallow sediments in Lake Bafa were investigated. The concentrations of nine heavy metals and the total organic carbon content in

Research Article Heavy Metals in Water and Sediment: A

2019-7-31  concentration of . ± .mg/L in downstream and Cd has had the lowest concentration of . ± .mg/L in upstream area. e seasonal distribution of the mean concentrations of metal of Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn in Tembi River water have been shown to be as follows (the maximum amounts are related to hot seasons):

Alloway, B. J., “Introduction,” Heavy Metals in Soils

The ground and homogenized rock samples were pulverized and analyzed for cadmium and lead using X-Ray Fluorescence Spectrometer. The concentrations of heavy metals in the outcrop rock samples ranged from < 0.10 7.95 mg kg –1 for cadmium (Cd) and < 1.00 4966.00 mg kg –1 for lead (Pb).

Concentration of various trace elements (non essential

Download scientific diagram Concentration of various trace elements (non essential heavy metals) in salt samples collected from different parts of Pakistan from publication: Analysis of Rock and