Magnetic Flocculation Technology for Copper and Zinc Ions Removal from the Tin Smelting Wastewater

2013 ◽  
Vol 295-298 ◽  
pp. 1284-1288 ◽  
Author(s):  
Chun Rong Wang ◽  
Xin Ren ◽  
Wen Xiu Li ◽  
Zhi Fei Hou ◽  
Chao Ke ◽  
...  
Keyword(s):  
Metal Ion ◽  
Rate Increase ◽  
Metal Removal ◽  
Copper Ions ◽  
Removal Rate ◽  
Zinc Ions ◽  
Magnetic Powder ◽  
Effluent Quality ◽  
Copper And Zinc ◽  
Smelting Wastewater

Magnetic flocculation technology was investigated for the removal of copper and zinc ions from simulated tin smelting wastewater, and the effects of magnetic powder dosage, flocculant dosage, and pH on the removal of copper and zinc ions were estimated. The results show that the effluent quality is poor with magnetic powder, PAC and PAM separately dosed, but when magnetic powder is combined with PAC or PAM, the excellent effluent quality is obtained with the removal rate of the copper and zinc ions of more than 90% and 70% respectively. In addition, under the condition of magnetic powder dosage of 30g/L and PAC dosage of 60mg/L, pH show more significant effect on zinc ions than copper ions with pH increased from 5 to 10, and the removal rate of zinc ions increase by about 24%, while the removal rate of copper ions only increase by about 2.5%. Compared with the system with single metal ion, the coexistent ion system has excellent heavy metal removal efficiency, namely the copper ions removal rate increase by 3.42%, and the zinc ions removal rate increase by 0.46%. Moreover, magnetic flocculation technology presents the characteristics of shorter time of flocculation and sedimentation, smaller volume of the flocs and faster separation velocity.

scholarly journals SORPTION OF COPPER AND ZINC BY GOETHITE AND HEMATITE

2015 ◽  
Vol 1 (12) ◽  
Author(s):  
Alexandra Bekényiová ◽  
Iveta Štyriaková ◽  
Zuzana Danková
Keyword(s):  
Metal Ion ◽  
Copper Ions ◽  
Ion Concentration ◽  
Batch Adsorption ◽  
Zinc Ions ◽  
Sorption Data ◽  
Adsorption Capacities ◽  
Copper And Zinc ◽  
Initial Ph ◽  
Natural And Synthetic

In the present work, the abilities of natural and synthetic samples of goethite and hematite to remove copper Cu(II) ) and zinc Zn(II) ions from aqueous solutions were compared. Batch adsorption experiments were performed in order to evaluate the removal efficiency of iron oxide samples. The effect of initial metal ion concentration, initial pH and time on adsorption of copper and zinc onto the iron oxides has been studied. The sorption data were represented by the linearized Langmuir model. Comparing the values of adsorption capacities, there were differences between the natural and synthetic samples, natural and synthetic goethite had higher sorption capacity for both metals than hematite. The copper ions showed higher affinity than zinc ions to all samples.

Removal of Copper Ion in Industrial Wastewater by Magnetic Flocculation Experimental Research

2013 ◽  
Vol 295-298 ◽  
pp. 1231-1234 ◽  
Author(s):  
Yong Gui Yang ◽  
Yun Long Yang ◽  
Xiao Hong Kang
Keyword(s):  
Industrial Wastewater ◽  
Ph Value ◽  
Copper Ions ◽  
Removal Rate ◽  
Copper Ion ◽  
Good Effect ◽  
Magnetic Powder ◽  
Wastewater Discharge ◽  
Sedimentation Time

An experiment on the removal of heavy metal copper ions from industrial wastewater by magnetic flocculation was studied and the influences of PFS dosage static sedimentation time，temperature，pH value and magnetic powder dosage on treatment effect were discussed at the same time .The result of the test showed that when the dosage of PFS and magnetic powder were 100 and 400 mg/l respectively the pH value was 8.0，the static sedimentation time was 20min, the said process had a good effect on copper containing wastewater treatment. The removal rate of copper ions was over 97％，and the mass concentration of copper ions in the effluent water was below 0.5mg/l. Therefore after be treated by magnetic flocculation the quality of copper-containing wastewater could meet the requirement of GB 8978-1996 Integrated Wastewater Discharge Standard .

Preparation of Triethylenetetramine-Functionalized Adsorbents for Selective Adsorption of Copper and Zinc Ions

2012 ◽  
Vol 557-559 ◽  
pp. 1078-1084
Author(s):  
Chang Kun Liu ◽  
Xu Xin Zhao ◽  
Lin Fang ◽  
Xiao Fang Yue
Keyword(s):  
Metal Ion ◽  
Selective Adsorption ◽  
Ph Effect ◽  
Single Species ◽  
Industrial Applications ◽  
Zinc Ions ◽  
Adsorption Selectivity ◽  
Copper And Zinc ◽  
Zn Ions ◽  
Cu And Zn

Selective adsorption of a target adsorbate is critical in adsorbent performance evaluation, and is of great importance in industrial applications. In this study, the selective adsorption of copper and zinc ions was investigated with the polyamine-functionalized polymeric adsorbents. The adsorbent was prepared by amination of crosslinked poly (glycidyl methacrylate) (PGMA) with triethylenetetramine (TETA). The influencing factors including reaction time and TETA content during adsorbent synthesis were investigated. The prepared adsorbents (P-TETA) was used to study the adsorption selectivity toward copper and zinc ions in single species system (when only one metal ion is present) and binary species system (when both metal ions are present). Both the pH effect and the adsorption isotherm were examined in single and binary species system. It was found that both Cu and Zn ions would be adsorbed onto P-TETA in significant amount in single species system at higher pH values. However, in binary species system with high initial concentrations for both Cu and Zn ions, Cu ions would be selectively adsorbed onto P-TETA, with insignificant amount of Zn ion adsorbed. The higher coordination constant (in Log K form) of Cu-TETA coordination than Zn-TETA coordination was identified as the major mechanism for the selective adsorption of Cu over Zn ions with P-TETA adsorbents.

Equilibrium and Kinetic Studies on Removal of Binary Metal Ions Using Immobilized Saccharomyces cerevisiae

2014 ◽  
Vol 661 ◽  
pp. 39-44
Author(s):  
Nur Khalida Adibah Md Rodzi ◽  
Senusi Faraziehan ◽  
Alrozi Rasyidah
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Metal Ions ◽  
Copper Ions ◽  
Binding Capacity ◽  
Kinetic Studies ◽  
Suitable Model ◽  
Zinc Ions ◽  
Copper And Zinc ◽  
Maximum Sorption ◽  
Pseudo Second Order

In this study, biosorption of copper and zinc ions on Baker’s yeast, Saccharomyces Cerevisiae was investigated. The data of batch experiments was used to perform equilibrium and kinetic studies. The experimental results were fitted well to the Langmuir and Freundlich model isotherms. According to the parameters of Langmuir isotherm, the maximum biosorption capacities of copper and zinc ions onto immobilized yeast were 5.408mg/g and 1.479mg/g at 293 Kfor the treated beads. Competitive biosorption of two metal ions was investigated in terms of maximum sorption quantity. The binding capacity for copper ions is more than the zinc ions for both untreated and treated immobilized yeast.While, for the kinetic studies, the pseudo second order model was found the most suitable model for the present systems.

scholarly journals Effects of the influence of copper and zinc on living organisms (literature review)

2021 ◽  
Vol 100 (2) ◽  
pp. 172-177
Author(s):  
Alexandra Ye. Kopach ◽  
Olha Ye. Fedoriv ◽  
Nataliia A. Melnyk
Keyword(s):  
Metal Ion ◽  
Clinical Medicine ◽  
Negative Impact ◽  
Biological Significance ◽  
The Body ◽  
Zinc Ions ◽  
National Medical ◽  
Copper And Zinc ◽  
Serious Injury ◽  
Living Organisms

Introduction. Scientists from Horbachevsky Ternopil National Medical University, Ternopil, and various countries, including state laboratories, have thoroughly studied the biological significance of copper and zinc ions in the body for many years. Nevertheless, the value of the shortage or excess of these metals and their compounds in the body remains mostly underestimated for health. Purpose of work: to study the pathogenesis of traumatic disease occurring due to an imbalance of copper and zinc in the body. Methods. Bibliosemantic and analytical methods were used. A literature search was conducted for the following queries as zinc, copper, heavy metals, negative impact. The investigation was performed with PubMed, Scopus, Web of Science, and Google Scholar for various articles. All publications have been analyzed and included in this review. The importance of these metals’ lack or excess and their compounds in the body remains mostly underestimated. Features of the pathogenesis of many diseases occurring due to imbalance of copper and zinc in the body have also been unexplored. The traumatic disorder was no exception, as this was not considered in experimental and clinical medicine. Conclusion. From the analysis of the available scientific literature, no messages were found about the features of the course of traumatic disease in conditions of excessive intake of copper and zinc ions in the body. We can only assume that a violation of the functional ability of the liver, lungs, brain and other organs that occurs against the background of heavy metal ion damage creates an unfavorable background for the occurrence of a serious injury.

scholarly journals FEATURES OF BILIARY TRACT FUNCTION OF THE LIVER WITH MECHANICAL TRAUMA OF VARYING SEVERITY AGAINST THE BACKGROUND OF POISONING WITH SALTS OF COPPER AND ZINC

2019 ◽  
pp. 22-28
Author(s):  
O. Ye. Kopach ◽  
N. A. Fedoriv ◽  
N. A. Melnyk ◽  
H. A. Krytska
Keyword(s):  
Biliary Tract ◽  
Copper Ions ◽  
Male Rats ◽  
Control Group ◽  
Zinc Ions ◽  
Skeletal Trauma ◽  
Excess Copper ◽  
Copper And Zinc ◽  
Tract Function ◽  
Excessive Intake

Skeletal trauma causes significant biliary tract violations of the liver. Excess copper ions and zinc reduces biliary function of the liver. The aim of the study – to find out the pathogenetic features of liver damage in the case of mechanical injury of varying severity in the presence of excess copper and zinc ions in the body and its antidote therapy. Material and Methods. Experiments were performed on 150 non-linear white male rats weighing 180–200 g. In the context of chronic intoxication with copper and zinc sulfates, they simulated skeletal trauma of varying severity. In animals after 1, 3 and 7 days of post-traumatic period, bile duct function of the liver was studied. The received digital data was subject to statistical analysis. Results and Discussion. Against the background of a medium-degree injury, the indicator varied wavy: after 1 day it increased significantly in relation to the control group (by 32.7 %, p<0.05). After 3 days it significantly decreased and became 17.6 % less than control (p<0.05). After 7 days, it continued to remain at the same level (p<0.05 for control). In conditions of excessive ion exchange of copper and zinc in 1 day the indicator was at the control group level (p>0.05). However, after 3 and 7 days it was significantly lower than the reference level (27.8 % and 24.3 % respectively, p<0.05). In these conditions, after 1 and 3 days, the indicator was statistically significantly lower on the background of excessive intake of copper and zinc ions (31.6 % and 12.4 % respectively, p<0.05). Conclusions. Skeletal trauma causes a significant violation of biliary tract function of the liver. At a trauma of a light degree without intoxication copper and zinc salts in 1 day the index to 7 days increases. While in the middle and severe injuries, after 1 day it is greater than control, but in the future it is lower than the control group. Excessive intake of copper ions and zinc contributes to a decrease in the studied index from 1 to 7 days, and with the trauma of moderate and severe severity of the lungs 3 and 7 days it becomes significantly lower than in the nontoxic group.

Experimental Research for Heavy Metal Lead and Zinc Smelting Wastewater by Electroflocculation

2012 ◽  
Vol 534 ◽  
pp. 217-220 ◽  
Author(s):  
Ling Dong Fan ◽  
Xiao Jun Xu ◽  
Gang Wang ◽  
Jin Jin Yang ◽  
Tian Lei ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Removal Efficiency ◽  
Metal Removal ◽  
Removal Rate ◽  
Heavy Metal Removal ◽  
Electrolysis Time ◽  
Plate Spacing ◽  
Lead And Zinc ◽  
Zinc Smelting ◽  
Smelting Wastewater

In this paper,author use electroflocculationt to deal with heavy metal lead and zinc smelting wastewater,disiscussing the impact of electroflocculation to heavy metal removal rate under different pH,electrolytic voltage,electrolysis time ,plate spacing conditions. The results show that: heavy metal removal rate achieve the best effects when the situationgs is that pH is 11, electrolysis voltage is 2v, electrolysis time is 30 min , plate spacing is 1.2cm.Cd removal efficiency is 100% ,99.92 % removal efficiency of Zn,95.53% removal efficiency of Pb and 98.64% removal efficiency of Cu

Performance Analysis on Eco-friendly Machining of Ti6Al4V using Powder Mixed with Different Dielectrics in WEDM

2020 ◽  
Vol 17 (3) ◽  
pp. 8128-8139
Author(s):  
S. Chakraborty ◽  
S. Mitra ◽  
D. Bose
Keyword(s):  
Metal Removal ◽  
Removal Rate ◽  
Machining Process ◽  
Process Efficiency ◽  
Machining Parameters ◽  
Dielectric Fluids ◽  
High Emission ◽  
Pulse On Time ◽  
Pulse Off Time ◽  
Wedm Process

The recent scenario of modern manufacturing is tremendously improved in the sense of precision machining and abstaining from environmental pollution and hazard issues. In the present work, Ti6Al4V is machined through wire EDM (WEDM) process with powder mixed dielectric and analyzed the influence of input parameters and inherent hazard issues. WEDM has different parameters such as peak current, pulse on time, pulse off time, gap voltage, wire speed, wire tension and so on, as well as dielectrics with powder mixed. These are playing an essential role in WEDM performances to improve the process efficiency by developing the surface texture, microhardness, and metal removal rate. Even though the parameter’s influencing, the study of environmental effect in the WEDM process is very essential during the machining process due to the high emission of toxic vapour by the high discharge energy. In the present study, three different dielectric fluids were used, including deionised water, kerosene, and surfactant added deionised water and analysed the data by taking one factor at a time (OFAT) approach. From this study, it is established that dielectric types and powder significantly improve performances with proper set of machining parameters and find out the risk factor associated with the PMWEDM process.

scholarly journals The Efficacy of Whole Oyster Shells for Removing Copper, Zinc, Chromium, and Cadmium Heavy Metal Ions from Stormwater

2021 ◽  
Vol 13 (8) ◽  
pp. 4184
Author(s):  
Zhiying Xu ◽  
Caterina Valeo ◽  
Angus Chu ◽  
Yao Zhao
Keyword(s):  
Surface Area ◽  
Hexavalent Chromium ◽  
Removal Efficiency ◽  
Exposure Time ◽  
Food Waste ◽  
Positive Relationship ◽  
Copper Ions ◽  
Zinc Ions ◽  
Cadmium Ions ◽  
Initial Concentration

This research investigates the use of a common food waste product for removing four different types of metals typically found in stormwater. Whole, unprocessed oyster shells are explored for use in stormwater management infrastructure that addresses water quality concerns. The role of the shells’ surface area, exposure time, and the solution’s initial concentration on the removal efficiency were examined. Beaker scale experimental results demonstrated very good efficiency by the oyster shells for removing copper ions (80–95%), cadmium ions (50–90%), and zinc ions (30–80%) but the shells were not as effective in removing hexavalent chromium (20–60%). There was a positive relationship between initial concentration and removal efficiency for copper and zinc ions, a negative relationship for hexavalent chromium, and no relationship was found for cadmium ions. There was also a positive relationship between surface area and removal efficiency, and exposure time and removal efficiency. However, after a certain exposure time, the increase in removal efficiency was negligible and desorption was occasionally observed. A mid-scale experiment to mimic real-world conditions was conducted in which continuous inflow based on a 6-h design storm was applied to 2.7 kg of whole, unprocessed oyster shells. The shells provided an 86% and an 84% removal efficiency of cadmium and copper ions, respectively, in one day of hydraulic retention time. No removal was observed for hexavalent chromium, and zinc ion removal was only observed after initial leaching. This work has significant implications for sustainable stormwater infrastructure design using a material commonly found in municipal food waste.

scholarly journals Adsorption of copper ions on Magnolia officinalis residues after solid-phase fermentation with Phanerochaete chrysosporium

2019 ◽  
Vol 17 (1) ◽  
pp. 1173-1184 ◽  
Author(s):  
Fengyun Tao ◽  
Yangping Liu ◽  
Junliang Chen ◽  
Peng Wang ◽  
Qing Huo
Keyword(s):  
Chinese Medicine ◽  
Phanerochaete Chrysosporium ◽  
Solid Phase ◽  
Copper Ions ◽  
Removal Rate ◽  
Low Cost ◽  
Preparation Technique ◽  
Adsorption Enthalpy ◽  
Pseudo Second Order ◽  
Magnolia Officinalis

AbstractThe disposal of residues while manufacturing Chinese medicine has always been an issue that concerns pharmaceutical factories. Phanerochaete chrysosporium was inoculated into the residues of Magnolia officinalis for solid-phase fermentation to enzymatically hydrolyze the lignin in the residues and thus to improve the efficiency of removal of the copper ions from residues for the utilization of residues from Chinese medicine. With the increase in activities of lignin-degrading enzymes, especially during the fermentation days 6 to 9, the removal rate of copper ions using M. officinalis residues increased dramatically. The rate of removal reached the maximum on the 14th day and was 3.15 times higher than the initial value. The rate of adsorption of copper ions on the fermentation-modified M. officinalis residues followed the pseudo-second-order kinetics. The adsorption isotherms were consistent with the Freundlich models. The adsorption enthalpy was positive, indicating that it was endothermic and elevation in temperature was favorable to this adsorption process. The adsorption free energy was negative, implying the spontaneity of the process. The copper ions adsorbed could be effectively recovered using 0.2 M hydrochloric acid solution. After five successive cycles of adsorption-regeneration, the fermentation-modified M. officinalis residues exhibited a stable adsorption capacity and greater reusability. The M. officinalis residues fermented with P. chrysosporium are low-cost and environmentally friendly copper ions adsorbent, and this preparation technique realizes the optimum utilization of Chinese medicine residues.

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