The results of isothermal adsorption of different heavy metals by sediments are shown in Fig. 2.In general, the isothermal adsorption curves of Cu 2+, Zn 2+, Pb 2+ and Cd 2+ by sediments showed a similar changing trend. At the lower concentration range (< 100 mg/L) of adsorption equilibrium solution, the adsorption amount of heavy metals on sediments …
In this study, we investigated the bioaccumulation, tissue distribution and physiological responses to different metal concentration (0.2 and 2 mM) and time of exposure of 1, 2 and 3 weeks with cadmium (Cd), copper (Cu), lead (Pb) and zinc (Zn) using the model liverwort Marchantia polymorpha. Our data showed, on one hand, a significant enrichment and …
Evidence of fluid evolution of Baoshan Cu−Pb−Zn polymetallic deposit: Constraints from in-situ sulfur isotope and trace element compositions of pyrite. Author links open overlay panel Jun-ke ZHANG a b, Yong-jun SHAO a b, Ke CHEN a b, Hua-jie TAN a b, Rui-chang TAN a b, Tian-dong ZHANG a b, Zhong-fa LIU a b. Show more.
The percentage of release was decreased in the following order: Cd > Mn > Pb > Zn > Ni > Cu > Fe. The highest percentage of released PTEs was observed for citric acid, followed by oxalic acid. In all LMWOAs and concentrations, the percentage of the released PTEs in the various treatments was decreased in the following order: C+PM > clay loam ...
The average concentrations of Cu, Cd, Pb and Zn in rice grains were 2.23, 10.98, 29.84 and 1.62 times their corresponding maximum allowable levels, indicating potential health risks to humans. Cd has greater bioavailability because of its high mobility from soil to roots, and its subsequent transfer to grains.
In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite, galena, cerussite, hemimorphite and iron oxide minerals with 5.04% CuO, 1.61% PbO, 2.07% ZnO and 56.40% SiO2. The experimental design methodology (RSM) was …
Results of the CF index showed that Ni, Cu, and Zn values were less than 1, indicative of low contamination, whereas, Pb contamination, with values ranging from 3‐6 was indicative of high pollution.
SIMPULAN DAN SARAN Logam berat ini: Chromium (Cr), Timbal (Pb), Tembaga (Cu), Zinc (Zn) dan Cadmium (Cd) yang ditemukan pada lokasi penelitian melebihi ambang batas, sehingga diperlukan penelitian ...
Comparison of Kd, distribution coefficient, with other literature showed that the nanoparticles were better sorbents than other metal oxide nanoparticles and a commercial activated carbon. PurposeAdsorption of metals (Pb, Cd, Cu, Ni, Zn) to TiO2 nanoparticles and bulk particles was examined for use as a contaminant removal substrate as a function of particle size, sorbent …
The concentrations of Zn, Pb and Cu in fruits of wild strawberries, amounting to 59.89, 19.05 and 2.71 mg/kg, respectively, were at the similar level as the metal concentrations in grass. The ...
This study was designed to determine the levels of microminerals (manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), chromium (Cr)) and heavy metals (cadmium (Cd), lead …
Sulfur and chlorine are the two most important ligands accounting for metal transport in the upper crust. In this study, four metal- and sulfur-saturated model fluids with varying salinities and redox states were simulated in the Fe-Cu-Pb-Zn-Au-S-C-H-O system, over a wide pressure-temperature (P-T) range (50–650 °C, 0.8–5.0 kbar), in order to compare the …
Determination of Zn, Cu, Cd, Pb, Ni and Cr in some Slovenian foodstuffs. An acid-assisted microwave digestion procedure was optimised for the determination of trace elements …
Нигери (Англи: Nigeria), албан ёсоор Холбооны Бүгд Найрамдах Нигери Улс (Англи: Federal Republic of Nigeria), нь 36 муж улс, нэг Холбооны Нийслэлийн Нутаг дэвсгэрээс тогтох, үндсэн хуульт холбоот улс юм.
Potenziare gli ingegneri e gli scienziati con la conoscenza dei materiali. Total Materia è consapevole che la conoscenza dei materiali è essenziale per il successo in un'ampia gamma di settori. Ecco perché abbiamo creato il database dei materiali più completo al mondo, con oltre 1 milione di materiali e 100 milioni di punti dati.. Total Materia vi offre il potere della conoscenza …
Solely applying biochar significantly decreased the uptake of Cd, Pb, Zn, and Cu by pakchoi (Fig. 7). Under BC1 treatment, pakchoi exhibited a 47.85 % reduction in Cd absorption and a 50.45 % reduction in Zn absorption. In the BC0.5 treatment, the absorption of Pb and Cu by pakchoi decreased by 44.96 % and 24.74 %, respectively.
The BKMR model analysis indicated that co-exposure to Cu, Zn, Cr, and Pb has a significantly adverse effect on erythrocyte-related indicators, especially MCH and MCV. Cu, …
The average values of metals in hair were as follow (in μg/g): Fe (37.35), Zn (161), Cu (42.95), Cr (0.27), Pb (0.01). ... өмнөх ба дараах гэсэн үе шаттайгаар ...
The Pusangguo deposit (1.42 Mt @ 1.42% Cu, 0.14 Mt @ 1.82% Zn, 0.08 Mt @ 1.01% Pb, and 285.8 t Co @ 140 g/t Co) is the first Co-rich Cu-Zn-Pb skarn deposit discovered in the Gangdese metallogenic belt. However, the trace and minor element geochemistry of the sulfides in this deposit has not been studied, limiting further understanding of elements' …
The elements of P, Cd, Cu, Pb, Se and Zn were further investigated. Cu, Cd, Pb and Zn are frequently studied metals (Goodyear and McNeill 1999), as elevated levels might be toxic to organisms. Zn and Cu are essential trace metals; whereas, Cd and Pb are in general considered non-essential (e.g. Rainbow 2002; Hejna et al. 2018). P is an ...
Metal pollution in urban soils due to smelting and electroplating has become a severe problem in China. In this study, the concentration, chemical fraction, and leaching behavior of typical metals (Cu, Zn, Cd, and Pb) in soil samples from ten metallurgical sites were studied. The results show that some of the soils were polluted with Cu and most were heavily polluted …
3.1 Purslane Growth Characteristics and its Cd, Cu, Pb, and Zn Contents in Aerial Parts and Roots. Plant growth parameters measured were height, and dry weights of the aerial biomass and roots of purslane (Table 1).As for the height, the various treatments did not affect it, as average values across amendments were found with non-significant differences, ranging …
This study was designed to determine the levels of microminerals (manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), chromium (Cr)) and heavy metals (cadmium (Cd), lead …
Here, we investigate the root causes for distinct metal zonation at the Baiyangping deposit, Sanjiang metallogenic belt, SW China. The Baiyangping deposit shows clear zonation …