An exploratory study on soil contamination of heavy metals was carried out surrounding Huludao zinc smelter in Liaoning province China The distribution of total heavy metals and their chemical speciations were investigated The correlations between heavy metal speciations and soil pH values in corresponding sites were also analyzed In general Cd Zn
In this research Zn Ni and Cu recovery from mobile phone printed circuit boards was investigated The initial pH and pulp density using Aspergillus niger or Penicillium simplicissimum fungi
The plant first involves a CuPb rougher flotation circuit where a CuPb concentrate is produced this con centrate is further processed by flotation to separate the copper concentrate and the lead
a Workflow for high throughput screening of Cu Mn Ni Zn high entropy alloy electrocatalysts for selective CO2 reduction to methane CH4 and methanol CH3OH
Revealing the orogenic genesis of Huogeqi Cu Pb Zn deposit Evidence from the machine learning based data interpretation of pyrite geochemistry February 2023; Ore Geology Reviews 154 3 105350;
In the separation process optimal recoveries of Cu Zn Pb and Sn were found to occur at a temperature of 1300 °C and a gravity coefficient of 1000 and the recovery values of Cu and Zn were % and % respectively In the complete process the total recovery values of Pb and Sn were % and % respectively
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
Table 2 The enthalpy of mixing ΔH A B between various metals [41] Logarithm values of the estimated molar distribution ratio of minor metals between Fe rich and Cu rich liquids l g K M C u / F e at 1473 K and distribution ratios obtained in different literatures [27 48] a and logarithm values of the estimated molar distribution ratio of minor metals
IX offers an effective method for the recovery of these metals from a leachate This study presents the pH performance of six selected IX resins in extracting Cu 2 Fe 2 Pb 2 and Zn 2 from acetic lactic and citric acid media simulated weak acid leachate Acetic acid media displayed limited suppression of metal extraction whilst lactic
Semantic Scholar extracted view of "Improved leaching of Cu Sn Pb Zn and Al from waste printed circuit boards by electro generated Cl2 in HCl solution " Leaching of Au Ag and Pd from waste printed circuit boards of mobile phone by iodide lixiviant after supercritical water pre treatment Fu Rong Xiu Yingying Qi Fu Shen Zhang
The main criticality of this approach is the low purity level due to the Cu and Zn coprecipitation; the final product showed an average composition of 90% and 10% of Cu and Zn respectively Cu Zn system Therefore a step sequence was proposed to increase the final CuSO 4 ∙5H 2 O percentage up to 99% considering Cu Zn More in detail
Cu and 800 mg L 1 Zn; 3 mobilize the highest concentrations of water soluble Cu Zn Pb and Fe and mgL 1 respectively ; and 4 adsorb the greatest quantities of Cu and Zn and mgg 1 dry cell respectively Our findings suggest that Acinetobacter sp FQ 44 could be exploited for bacteria assisted
Nonferrous smelting is an important source of heavy metals in soil which causes different degrees of soil pollution especially in lead zinc Pb/Zn smelting areas Based on the Pb/Zn environmental release during the Pb/Zn mineral smelting processes in 31 Chinese provinces from the period 2000 to 2015 the study analyzed the spatiotemporal variations in
The optimum conditions for Cu Zn and Ni extractions were determined as H2SO4/SRIC ratio roasting temperature 300 °C roasting time 60 min leaching temperature 50 °C leaching time 60 min
Due to the advancement of industrialization and the development of the metal smelting industry cadmium Cd as a highly toxic heavy metal element is discharged into the natural environment in the form of dust slag and waste solutions during the Cu Pb Zn smelting process causing great harm to the soil water environment and human health Meanwhile Cd
Pb has been estimated to have a soil retention time from 150 to 5000 years Kumar et al 1995 In a mixed metal contaminated soil Cu Cd Pb and Zn Zn is most likely to be responsible for ecological effects in invertebrates Spurgeon and Hopkin 1995; Laskowski and Hopkin 1996; Fountain and Hopkin 2004; Jensen and Pedersen 2006 This
The 7xxx Al Zn Mg Cu alloys were extensively utilised in aerospace and rail transit due to their low density high strength and excellent processability Nevertheless an increase in strength inevitably comes at the expense of ductility and vice versa which was known as the strength ductility trade off dilemma Extensive research had been conducted to
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
