Using electrocoagulation for metal and chelant separation from washing
Electrocoagulation with an Al sacial anode was tested for the separation of chelant and heavy metals from a washing solution obtained after leaching Pb (3200 mg kg(-1)), Zn (1100 mg kg(-1 ...
Heavy metals (Cd, Pb, Zn, Ni, Cu and Cr(III)) removal from …
The result showed that glucose with concentration 20 g/L gave the highest BNC production at 4.76 g/L, while lactose was the lowest at 1.26 g/L The effect of pH was studied in the range of 3.5-7.5 ...
Competitive sorption of Cd, Cr, Cu, Ni, Pb and Zn from …
The metals are mainly present as divalent (Cd 2+, Cu 2+, Ni 2+, Pb 2+ and Zn 2+) or trivalent (Cr 3+) cations species at acidic pH conditions, while as metal-carbonate (for Cu, Pb, Ni and Cd) or metal-hydroxide complexes (for Zn and Cr) at alkaline pH conditions. At neutral pH values, divalent cations are still the main species of Cd, Ni and …
(PDF) A Study on Removal of Heavy Metals (Cu, Zn, and Pb) …
In this study, heavy metals are removed by soil washing from soils contaminated with Cu, Zn, and Pb, whose maximum concentrations are up to 3350, 1220, and 2240 mg/kg, respectively.
Remediation of Cu-, Zn-, and Pb-Contaminated Soil Using …
The 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.
Recycling of EDTA solution after soil washing of Pb, Zn, …
The reagents used include NaOH, Ca(OH) 2, Na 2 S, NaH 2 PO4, Na 2 HPO4 and so forth (Lim et al. 2005). Some of them may be inefficient to remove metals from the EDTA solution, and some may ...
Comparison of microscopic adsorption characteristics of Zn(II), Pb…
The relation between reaction time and the adsorption of Zn(II), Pb(II) and Cu(II) at pH = 5.0 is shown in Fig. 2b,d. The reaction rate and adsorption capacity for Pb(II) were higher than those ...
Competitive adsorption of Cd, Cu, Pb and Zn by different …
The third important issue influencing heavy metal mobility is soil properties. The soil composition, which consists of sand, silt and clay, and/or organic content, affects the adsorption of heavy ...
Movement of water and heavy metals (Zn, Cu, Pb and Ni) through sand …
1.. IntroductionEC Directive 91/271/EEC (CEC, 1991) banned the disposal of sewage sludge at sea on 31st December 1998, as a result of which applications to agricultural land are likely to increase, as this is an economic and beneficial alternative means of disposal.In the UK, 526,000 tonnes of the 1.12 million tonnes of sludge dry …
Mobility of Cr, Pb, Cd, Cu and Zn in a loamy sand soil: A comparative
D: clay soils at low elevation (TOC: 23.2, pH: 4.47), and best-fit model lines using the DIFS model. in K dl was observed in Pb. We hypothesize that this observation may be associated with three ...
Solubility control of Cu, Zn, Cd and Pb in contaminated soils
McBride et al. (1997) advocated using total concentrations of Cu, Zn, Cd, and Pb in soils, together with values of soil pH and organic carbon content which affect metal ion speciation, to estimate ...
Removal of Pb, Zn, and Cd from contaminated soil by new washing …
The metal contents of exchangeable fraction for soil Pb, Zn, and Cd were reduced by 10.24–20.51% after washing with the four washing agents except for Pb with CB and PW (about 4%). The reductions of reducible, oxidizable, and residual fractions of heavy metals washed with CN were higher than those of the other three washing …
Spatial Distributions and Intrinsic Influence Analysis of Cr, Ni, Cu …
The spatial distributions of Cr, Ni, Cu, Zn, As, Cd and Pb (potentially toxic elements, PTEs) in sediments and intrinsic influence factors from the Wuliangsuhai wetland of the Hetao Irrigation District, China were studied in this work. The results showed that excluding Zn, the total contents of other PTEs were higher than the background values, …
Mobilization of Cu and Pb from multi-metal contaminated …
Purpose The aim of the research was to determine the potential of dissolved humic substances extracted from leonardite to mobilize Cu and Pb from multi-metal contaminated soils with the scope of finding an efficient washing solution as a possible substitute for conventional washing agents used to extract heavy metals from polluted …
Factors determining Cd, Co, Cr, Cu, Ni, Mn, Pb and Zn …
The aim of this work was the determination of the linkage between land use and mobility of potentially toxic elements in soil. A total of 193 soil samples taken from the surface soils of Hungary were used in the analysis. Based on the investigated properties [pH, soil organic matter (SOM), dissolved organic carbon (DOC) and clay], the forest …
Comprehensive assessment of harmful heavy metals in
The order of potential ecological harm degree of heavy metal was as follows: Cd > Hg > As > Cu > Ni > Pb > Cr > Zn. The ER values for As, Cr, Hg, Pb, Cu, Zn, and …
The geochemical processes affecting the mobility of Cu, Pb, Zn …
The concept of circular economy in wastewater treatment has recently gained immense interest and this is primarily fueled by the ever-growing interest to minimize ecological footprints of mining ...
Heavy metals in agricultural cultivated products irrigated …
The concentrations of Zn (227–401 μg g −1) and Pb (303–580 μg g −1) were found above the permissible limits of Indian standards in collected soil samples (Zn 300 and Pb 250 …
A review on iron, zinc and calcium biological significance and factors …
Food is the main source of many nutrients that are required for the normal function of our body. Nutrition is defined as the science of food, the nutrients and other substances therein, their action, utilization, interaction and balance concerning to health and disease and the processes through which the organism ingests, absorbs, transports, …
Sources, effects and present perspectives of heavy
One of the main factors contributing to soil pollution is thought to be HMs. Several metals, including Cr, Cu, Pb, Zn, Cd, and Ni, are responsible for heavy metal pollution of the soil. HMs indirectly affect soil enzymatic activities by shifting the microbial community that synthesizes enzymes [84].
(PDF) Phytoremediation Based on Canola (Brassica napus L.) and Indian
The use of plants to remove heavy metals from soil (phytoremediation) is expanding due to its cost-effectiveness as compared to conventional methods and it has revealed a great potential.
Using a Dielectric Capacitance Cell to Determine the …
Pure sand was saturated with water artificially polluted in the lab with Pb, Cd, Fe, and Zn at heavy metal contents 0, 7.5, 15, 22.5, and 30 mg/kg of sand. This pollution level is considered low pollution limit, and it is close to the allowable limit of Cd adopted in the USA which was the highest allowable limit compared to other countries.
Removal of As, Cd, Cu, Ni, Pb, and Zn from a highly …
The system containing SLES was selected to study CCRD because of its low cost and biodegradation. Cd and Zn removal efficiencies were 45.2% and 47.7%, respectively, at 40 mmol/L of 5-mL SLES ...
A critical review on soil washing during soil remediation for …
Soil washing is widely considered as a common method of soil remediation. This study examined the developments in soil washing during the past 20 years via a bibliometric and systematic critical review. Different washing agents (inorganic and organic chelating agents and surfactants) exhibit different effects and mechanisms under varying …
Feasibility Study of Differential Flotation of Cu–Pb–Zn …
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 …
(PDF) Chemically modified natural cotton fiber: A low-cost …
Chemically modified natural cotton fiber: A low-cost biosorbent for the removal of the Cu(II), Zn(II), Cd(II), and Pb(II) from natural water July 2014 Desalination and Water Treatment 52(22-24)
Factors affecting distribution and mobility of trace elements (Cu, Pb
Soil and Vitis vinifera L. (coarse and fine roots, leaves, berries) concentration and geochemical partitioning of Cu, Pb and Zn were determined in a contaminated calcareous Champagne plot to assess their mobility and transfer. Accumulation ratios in roots remained low (0.1–0.4 for Cu and Zn, <0.05 for Pb). Differences between …
Effects of various chelators on the uptake of Cu, Pb, Zn and …
The high- 10 Indian mustard Maize HIS EDDS EDTA 0 HIS 0 HIS Maize HISx2 0 HIS 0 EDDS 2 0 20 EDTA 4 HISx2 40 EDDS 6 0 60 EDTA 8 EDDS Pb 80 EDTA Cu Indian mustard 250 100 Zn Maize Indian mustard Maize HIS EDDS EDTA 0 HISx2 HIS EDDS 0 HIS 0 EDDS 0 0 50 EDTA 20 HISx2 100 HIS 40 EDDS 150 0 60 EDTA 200 EDTA Fe 80 …
Efficient Removal of Pb 2+, Cu 2+ and Zn 2+ by Waste Tea‐Derived Cost
Request PDF | Efficient Removal of Pb 2+, Cu 2+ and Zn 2+ by Waste Tea‐Derived Cost‐Effective Bioadsorbent | This study examined the potential of waste tea as an adsorbent for the removal of ...
Integrated soil washing and bioreactor systems for the …
DOI: 10.1016/j.envres.2022.112752 Corpus ID: 246182869; Integrated soil washing and bioreactor systems for the treatment of hexachlorocyclohexane contaminated soil: A review on enhanced degradation mechanisms, and factors affecting soil …