Leaching Behavior of Cu, Zn, and Pb Using Design of Experiment. Table 3 summarizes the experimental setup performed and the results obtained for the desired metals Cu, Zn, and Pb in a 4-h experiment according to the 3 3 Box–Behnken design. As shown, approximately 30% of Cu and Zn were leached within 4 h in experiment …
Various forms of nitrogen (ammonia, nitrate, nitrite and Total Nitrogen), Total Phosphorus (TP), Total Oil and Grease (TOG), Total Petroleum Hydrocarbon (TPH), organic matter …
The pairs of Cu–Zn (0.486) and Zn–Pb (0.423) showed high and significant correlations at 99 and 95 % confidence levels, respectively. Furthermore, the linear correlation for soil to leaf transfer showed that between Cd in soil and leaf, there is a high and significant correlation (0.560) at 99 % confidence level.
Download scientific diagram | Total petroleum hydrocarbon (mg TPH/kg) and total heavy metals (Cu, Cd, Ni, Zn, Cr and Pb) (mEqHM/kg) (the mg/kg of each heavy metal (HM) was transformed to mEq/kg ...
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 …
The optimum pyrolysis parameters for Cu-BC and Zn-BC were pyrolysis time of 3.09 and 2.19 h, pyrolysis temperature of 425.27 and 421.97 °C, and heating …
Specifically, all samples of Cu, Mn and Zn were at slight potential ecological risk level; 5% of As samples, 80% of Cd, 85% of Cr, 80% of Ni and of Pb (Table …
The Huogeqi is a large Cu-Pb-Zn polymetallic deposit having a metal reserve of 0.7113 Mt Cu at an average grade of 1.35 % Cu, 0.78 Mt Zn at 1.46 % Zn, and 0.97 Mt Pb at 1.49 % Pb (Huang et al., 2001). In addition, iron formations within the ore-hosting sequences are also mined for iron resources (Li et al., 2021). The Neoproterozoic …
T D ACCEPTED MANUSCRIPT 1 1 Ion Exchange Removal of Cu(II), Fe(II), Pb(II) and Zn(II) from 2 Acid Extracted Sewage Sludge – Resin screening in weak acid 3 media 4 James P. Bezzina1, Laura R. Ruder1, Robert Dawson2, Mark D. Ogden1 5 1Separation and Nuclear Chemical Engineering Research (SNUCER), Department of Chemical and …
EPA's Superfund program issued ecological soil screening levels (Eco-SSLs) for seventeen inorganic and four organic contaminants that are frequently found in soil at Superfund sites. For background information on the development of Eco-SSLs and how they should be used in the Superfund ecological risk assessment process, see the …
As, Cd, Cu, Ni, Sb, Pb, and Zn in digested soil or plant samples were then analyzed in ICP-AES (inductively coupled plasma–atomic emission spectrometry; Ultima2 JY, Horiba Company, Edison, NJ,
substrate spiked with either Cu, Zn, or Pb After 8-wk, each plant was harvested and shoot dry matter (DM) yield was determined Experimental design Completely randomized design with 3 replicates: - 3 trace metals added as: CuSO 4, ZnSO 4, Pb(NO 3) 2 - 4 TM concentrations (adjusted pH ≈ 6.8) Cu: 0, 150, 275, 525 µg/g Zn: 0, 300, 550, 1050 µg/g
We validated the determination of the content of Cd, Cu, Pb and Zn using two digestion protocols: a microwave-assisted total digestion and an aqua regia extraction procedure based on the International Organization for Standardisation (ISO) 11466 method. Our goal in validating these two protocols, along with a nitric acid digestion, is to …
with a more objective bases for selecting design variants, e.g., pollution source and sizing. ... III 3.1 Trace metal removalb Cu, Zn & Pb Cu > 80%, Zn > 50% & Pb < 9 µg/L IV 4 TPH (4 years load) TPH > 95 % or < 0.1 ppm ... 2011 USA Lab & field Cu, Zn, TPH, TSS Fig 3. Direct comparison of soil and Aquafilt in dual system treating equal runoff ...
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Download Table | Biogeochemical parameters (Cd, Cr, Cu, Pb, Ni, Zn, Al, Mn, Fe, TON, TOC, TPH) of sampling points. from publication: 2015 revue de micropal ...
Based on actual investiga-tion cases, this study analyzed the soil pollution sta-tus of a remaining sites of the copper and zinc roll-ing industry, and found that the pollutants …
The workflow for high-throughput screening of HEA catalysts is illustrated in Fig. 1 a.Cu, Mn, Ni, and Zn were chosen as components of the HEA because they have been previously identified as potential candidates for mono-catalysts in the CO 2 reduction to CH 4 and CH 3 OH [37], [38].Moreover, first-principles calculations have shown that …
The chemical composition within the 2 nd-neighbor local zone is then Zn + Cu 9.4 Zn 2.6 + Cu 3.5 Zn 2.5 = Cu 12.9 Zn 6.1, or Cu 67.9 Zn 32.1 in at.%, which is close to that of the alloy, Cu 68.9 ...
The concentration of background heavy metals (As, Cd, Cu, Ni, Pb, and Zn) was analyzed according to Topper and Kotuby-Amacher (1990) using an inductively coupled plasma …
The concentrations of Cu, Ni and Zn in the analyzed soil samples are lower than the maximum allowable limit (MAL) of heavy metals in soils in other countries (Table 3).
TPH and heavy metal contents of dust fallout: a case study ... Cu, Pb, and Zn show significant enrichment relative to the upper continental crustal component (Mn); (4) ... design by Al-Awadhi ...
The applications of copper (Cu) and Cu-based nanoparticles, which are based on the earth-abundant and inexpensive copper metal, have generated a great deal of interest in recent years, especially in the …
Specifically, all samples of Cu, Mn and Zn were at slight potential ecological risk level; 5% of As samples, 80% of Cd, 85% of Cr, 80% of Ni and of Pb (Table S5) were at medium and above ...
Strain S44, identified as Acinetobacter sp. FQ-44 based on 16S rDNA sequencing, was specifically chosen as the most favorable strain owing to its strong capabilities to (1) promote the growth of rape seedlings (significantly increased root length, shoot length, and fresh weight by 92.60%, 31.00%, and 41.96%, respectively) under …
However, Cu, Zn, Pb, Cd and Hg exceeded the standard in some samples, and all higher than background values in the study area, which indicated that the soil was contaminated in some parts of the ...
The soil at the copper and zinc rolling site exhibits a composite contamination of heavy metals such as Cu, Ni, Zn, Pb, as well as organic compounds such as TPH …
The Pulang super-large porphyry Cu polymetallic deposit, located in the Sanjiang area of Yunnan Province, is one of the largest Cu deposits in China. This deposit hosts Cu resources of ~5 × 106 t and other ore-forming elements, such as Mo, Au, Ag, Pb, Zn, Pt and Pd. Recently, obvious hydrothermal vein-type Pb–Zn mineralization, with a …
Fig1. Overview of column setup. Methods and Materials. um hydrocarbon (TPH) and trace metal removal w. s tested in a lab-scale column. The testing procedure consists of eight …
The independent sample t-test showed that mean Cu concentration difference was significant between the sampling months (t (34) = 21.58; p < 0.05) while for Pb it was not significant between the ...
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