The lead Pb is one of the most common heavy metal contaminants in soils Plants are exceedingly harmful to it Zeng et al 2007 Pb has no biological purpose in plants although it can create morphological physiological and biochemical problems Zeng et al 2007 Kumar et al 2017 A soil lead hazard is defined by the Environmental Protection Agency
PurposeThis study investigated the extent of metal accumulation by plants colonizing a mining area in Yazd Province in Central Iran It also investigated the suitability of these plants for phytoextraction and phytostabilization as two potential phytoremediation and methodsPlants with a high bioconcentration factor BCF and low
Among the plants Phyla nodiflora was the most efficient in accumulating Cu and Zn in its shoots TF=12 and while Gentiana pennelliana was most suitable for phytostabilization of sites
The final stage in iron ore processing is ironmaking where the iron ore is transformed into molten iron through a process called reduction The most common method of ironmaking is the blast furnace route In a blast furnace iron ore coke carbon and fluxes limestone or dolomite are loaded into the furnace from the top
soil screening level based on ingestion 390 mg kg−1 set by US EPA ICDA 2001 respectively In addition high concentrations of Pb Cd Cu and Zn were also found in the tanning sludge storage sites Table2 Meanwhile met al concentrations in the soil samples collected from differ ent sites were highly correlated with Cr Zn r =
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 Pb Zn resource of
In the Lingchuan Daoping and Xinglu Pb Zn ore fields in northern and eastern Guangxi Autonomous Region Pb Cu botanogeochemical anomalies may be ascribed to the excessive amounts of Pb and Cu taken up by the root system of plants such as China fir Cunninghamia lanceolata Lamb Hook mason pine Pinus massoniana Lamb and bracken fern Pteridium
The hydrothermal mineralization process can be subdivided into two stages 1 a main stage with predominant Cu Pb Zn mineralization stage where ore forming structures are characterized by brittle ductile and brittle shear deformation The main stage sulfide veins cut the mylonite fabrics of the host rocks
Consistent ore characteristics over many years have demanded only minor process changes; this is set to change with ore being sourced from two new ore zones namely the WF3 Zone 2 characterized by
The Kangjiawan Mt % Zn and % Pb is a representative Pb Zn deposit in the central QHMB and its mineralization can be divided into three stages I pre ore quartz pyrite II
The Baoshan Cu Pb Zn deposit is one of the representative polymetallic deposits in the middle of the Nanling Range the western part of the Qin Hang ore belt In order to better understand the magmatic activity granodiorite porphyry and porphyritic granodiorite and mineralization in the Baoshan deposit in situ U Pb and Lu Hf isotope studies of zircons and
The Tarz Zn Pb deposit is located in the Tabas block of the Central Iranian Microcontinent and consists of stratabound orebodies hosted by dolomitic limestone of the Middle Triassic Shotori Formation Two stages of sphalerite were identified in the Tarz deposit dark brown sphalerite formed in early stage and light brown sphalerite represented a later stage
Using the two step leaching method % of Cd % of Zn % of Cu and % of Pb were leached in the first step by M HCl at a contact time of 240 min and the leaching efficiencies for Cd Zn Cu and Pb were elevated up to and % by subsequent treatment with M EDTA at 480 min respectively
The former two were below the limits of Grade Ⅱ in three stages except in G1 and G4; Fig 1 B In the first stage up to day 15 the REs varied % % in all groups expect for G1; Fig 1 B; Table 1 The second stage was observed for G2 G3 and G6 at days 15 45 and for G5 and G7 at day 30 Pb Zn Cd Cu
Spontaneously growing native plants were analyzed to study the accumulation of Cd Cr Cu Zn Pb Fe and P in shoots and roots and other plant species demonstrated to grow well in metal contaminated soil taking up only low concentrations of metals and therefore they are good candidates for phytostabilization Expand
The accumulation of Zn Cu Cd and Pb in the shoots of all nine plant species remained below the Swiss tolerance values for fodder plants 150 mg kg −1 Zn 15 35 mg kg −1 Cu 40 mg kg −1 Pb and 1 mg kg −1 Cd DW with the only exception of Pb in Chenopodium album shoots which reached a concentration of 62 mg kg −1 DW Antimony
Using a global database of 664 hyperaccumulating plants we constructed a phylogeny of hyperaccumulating plants of As Cd Cu Cr Mn Ni Pb and Zn We evaluated the phylogenetic randomness of plants hyperaccumulating different metals by comparing the minimum number of trait state changes across the phylogenetic tree to a null model
Copper Cu is an essential mineral nutrient for the proper growth and development of plants; it is involved in myriad morphological physiological and biochemical processes Copper acts as a cofactor in various enzymes and performs essential roles in photosynthesis respiration and the electron transport chain and is a structural component of
In this study we investigated the concentrations and enrichment coefficient of Pb Cd Cu and Zn of 20 samples of 17 plant species in Lanping lead zinc mine with the objective to 1 get better knowledge of the accumulating capacity of 20 samples of 17 plant species to Pb Cd Cu and Zn in such a environment condition and 2 choose
Download scientific diagram Simplified flowsheet of a Cu Pb Zn flotation plant from publication Mineralogical Characterization of Sieved and Un Sieved Samples Mineralogy ResearchGate the
As the electrical efficiency is highly dependent on concentrations of Cu II and Zn II values above 40 50 g/L make it economically unfeasible to incorporate EW cells in the processing sites
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