This study examined the presence and levels of nine heavy metals (Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn) in 16 surface water samples along the Chao Phraya River, identifying Fe, Mn, Zn, and Cr as ...
ادامه مطلب3. Wheel Sand Washer. Operating similarly to a spiral sand washer, a wheel sand washer uses a wheel-like structure to clean the sand. It's suitable for washing, grading, and dewatering of fine-grained and coarse-grained materials. The clean sand is collected through a series of buckets, while the impurities are discharged with the water flow. 4.
ادامه مطلبcomplexing strength of EDTA with Pb and the better water solubility of EDTA metal complexes. In addi-tion, the removal eciency of Zn and Cu with EDTA is signicantly …
ادامه مطلبThe influence of different pH conditions and simulated inter-root environmental solutions on the release behavior of heavy metals (Cu, Pb, and Zn) from contaminated soils was investigated. The results indicate that heavy metal leaching from the soil is more likely to occur under acidic conditions and there is a risk of sustained …
ادامه مطلبThe 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. …
ادامه مطلبThe feasibility of soil washing for the removal of Pb and Cu, from soil collected from contaminated sites polluted by copper mining and industrial activities, as well as sandy loam soil spiked ...
ادامه مطلبIn a two compartment pot culture experiment, clover plants (Trifolium repens L.) were inoculated with arbuscular mycorrhizal fungus, Rhizophagus irregularis, in sterile washed sand and then treated with Pb concentrations of 0, 150, 300 and 450 μM as Pb(NO 3) 2. The root compartment (RC) was isolated from the hyphal compartment (HC) by …
ادامه مطلبThis paper presents the first tests of Cu (7875 mg/kg), Pb (1414 mg/kg) and Zn (566 mg/kg) removal from contaminated soil with sewage-sludge–derived washing agents (SS_WAs) (dissolved organic ...
ادامه مطلبThe mobility and distribution of Pb, Zn, and Cd fractions in soils before and after washing with four plant washing agents at pH 4.0 were determined by the BCR …
ادامه مطلبUnder optimal conditions, high-pressure soil washing attained removal efficiencies of Cu (37.7%), Pb (36.6%), and Zn (45.1%), and the residual concentrations of heavy metals in the remediated soil ...
ادامه مطلبPlants 2021, 10, 241 3 of 23 3399 m above sea level) had granular material made up of clay gravel with sand, no stabilization work was observed and there was no revegetation nor drainage (Figure1).
ادامه مطلبSoils contaminated with Pb, Zn and Cd are hazardous. Persistent EDTA and biodegradable GLDA, EDDS and IDS have been used as chelators in the ReSoil soil washing technology, which recycles chelator and curbs toxic emissions. The washed soils supported similar growth of buckwheat (F. esculentum) and better growth of Chinese …
ادامه مطلبThe feasibility of combined phytoextraction and in situ washing of soil contaminated with Pb (1750mgkg–1), Zn (1300mgkg–1), and Cd (7.2mgkg–1), induced by the addition of biodegradable ...
ادامه مطلبCompetition between Pb and Zn in EDTA-enhanced soil washing for Experiment 4: ͑ a ͒ initial ͓ Pb ͔ = 5.66 mmol/ kg and ͓ Zn ͔ = 5.70 mmol/ kg; ͑ b ͒ initial ͓ Pb ͔ = 1.79 mmol/ kg and ͓ ...
ادامه مطلبOne of the foremost issues for the current society is heavy metal pollution which is caused owing to recent extraordinary urbanization and industrialization. The impact of metal contamination on the agricultural fields/soils results in contamination of food sources and reaching the human food chain. The heavy metals (HM) and metalloids …
ادامه مطلبEffect of the concentrations on the removal of Pb (a), Zn (b), and Cd (c) with plant washing agents from soil. CN Coriaria nepalensis, CB Clematis brevicaudata, PW Pistacia weinmannifolia, RC ...
ادامه مطلبRequest PDF | Spatial Distribution and Risk Assessment of As, Cd, Cu, Pb, and Zn in Topsoil at Rayong Province, Thailand | The objectives of this study were to …
ادامه مطلبThe objectives of this study were to characterize and map the spatial distribution of As, Cd, Cu, Pb, and Zn in topsoil at Rayong Province, a rapidly developing city, and to evaluate the associated health risks. A total of 130 soil samples were collected by a stratified random sampling technique. The soil samples were digested by HNO3, …
ادامه مطلبThe results of latter process showed that 1-2% Pb, 16-17% Cu and 21-24% Zn was removed by surfactin after 48h, whereas the removal of Pb, Cu and Zn was increased from 40% to 47%, 30% to 36% and 16% to 18% in presence of saponin with an increase from 24 to 72h at room temperature by the soil washing process at pH 4.
ادامه مطلبABSTRACT The contamination of lead (Pb) is one of the main environmental problems on a global scale. This study assessed the potential of native metallophytes growing on the Song Tho Pb mine in Kanchanaburi province, Thailand, by a field survey. Plants and the associated soil samples were collected. Total Pb …
ادامه مطلبThis paper presents the first tests of Cu (7875 mg/kg), Pb (1414 mg/kg) and Zn (566 mg/kg) removal from contaminated soil with sewage-sludge–derived washing agents (SS_WAs) (dissolved organic ...
ادامه مطلبThe content of As, Ag, Cd, Cu, Pb, and Zn was determined in individual plant organs and correlated with soil characteristics. The degree of the pollution depended on the metal with results ranging from uncontaminated (Cd) to moderately (Zn), strongly (As, Cu), and extremely contaminated (Pb, Ag) soils.
ادامه مطلبA total of 271 sediments samples from the Zhalong Wetland were analyzed for concentration and distribution of Hg, Cd, As, Cu, Pb, Zn, Cr, and Zn; their speciation according to the modified ...
ادامه مطلبand Zn) from polluted sites using different plant spe-cies. In metal contaminated soil, phytoextraction tech- ... Clay Silt Sand H 2O CaCl 2 Cd Cu Pb Zn 62.0 388 550 6.75 6.38 57.4 8.82 29.3 1724 231 DOCc [gkg −1] TOCb ... thorough washing by demineralized water. The root dis-
ادامه مطلبThe concentration and speciation of Cu, Pb and Zn in soil samples collected around the lead-zinc smelting plant of Baoji, NW China, were determined using X-ray fluorescence spectrometry and the ...
ادامه مطلبFor example, 4 found that the formation of aggregates occurred around plant roots in OM-treated Cu-Pb-Zn tailings. Hence, the colonization of native grasses as pioneer plants would be a useful method to improve the aggregation of Cu/Pb-Zn tailings and the resultant physical structure (39; 64). Consequently, the effect of plant growth in the OM ...
ادامه مطلبThis paper presents the first tests of Cu (7875 mg/kg), Pb (1414 mg/kg) and Zn (566 mg/kg) removal from contaminated soil with sewage-sludge–derived washing agents (SS_WAs) (dissolved organic ...
ادامه مطلبFine sand (0.05–0.25 mm) had a strong adsorption capacity for Cr and Pb because of the high Mn concentration. ... found that a 10 min US pretreatment enhanced acid soil washing by about 20% and ...
ادامه مطلبHere, we showed that four plant washing agents-from water ex … Removal of Pb, Zn, and Cd from contaminated soil by new washing agent from plant material Environ Sci Pollut Res Int. 2017 Mar;24(9):8525-8533. doi: 10.1007/s11356-017-8542-3. Epub 2017 Feb 12. Authors ...
ادامه مطلبSS containing Pb-102, Zn-968, Cu-267, Cr-101, Mn-222, and Fe-8374 mg kg⁻¹ was washed in a batch process for 1 h with a recycled washing solution containing 50 mmol L⁻¹ of recycled EDTA and ...
ادامه مطلب