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 .

Study on Advanced Pretreatment of Seawater by Electrolysis and Neutralization of Acidic Waste Water with By-Product Magnesium Hydroxide

2013 ◽  
Vol 821-822 ◽  
pp. 1071-1080
Author(s):  
Jing Nie ◽  
Shou Zhi Yi ◽  
Di Miao
Keyword(s):  
Removal Efficiency ◽  
Magnesium Hydroxide ◽  
Current Density ◽  
Industrial Wastewater ◽  
Removal Rate ◽  
Influence Factors ◽  
Operation Time ◽  
Wastewater Discharge ◽  
Electrode Distance

The advanced pretreatment by electrolysis of Bohai seawater in Tianjin used a diaphragm electrolyzer in the experiment. Removal efficiency and influence factors of the method were analyzed. Results show that turbidity, organic compounds, SDI and chroma of seawater were effectively decreased by electrolysis. Removal efficiency was significantly increased by current density, operation time and inter-electrode distance, and the optimum electrolytic conditions was determined as inter-electrode distance of 2 cm, current density of 15.87 mA·cm-2, operation time of 10 minutes. It was investigated that when the water quality after electrolysis was of pH 8.6, the chroma and turbidity decreasing trend slowed down, with chroma of 0.052 A, removal rate reached 88.4%; the residual turbidity reduced to 2.52 NTU, removal rate reached 90.71%. A PH of about 8.5, CODCr decreasing trend slowed down, and when CODCr < 750 mg/L, it conformed to the requirements of the reverse osmosis water. With the study on neutralization of steel pickling waste liquor by the by-product of magnesium hydroxide, it is found that the quality of treated water reached 3rd level national emissions standards (300-1000 mg/L). Magnesium hydroxide slurry of Cr (VI) removal rate reached 100%, conforming to the 1st level national industrial wastewater discharge standards (< 0.5 mg/L).

Optimization and Characteristics of Copper Pickling Wastewater Treatment in a Single Reactor Using Bio-Electrode Process

2012 ◽  
Vol 446-449 ◽  
pp. 2800-2808
Author(s):  
Guo Jing Yang ◽  
Shuang Shuang Chen ◽  
Wei Hong Wu ◽  
Jian Zhou
Keyword(s):  
Hydraulic Retention Time ◽  
Nitrate Nitrogen ◽  
Ph Value ◽  
Removal Rate ◽  
Copper Ion ◽  
Ion Concentration ◽  
Effluent Water ◽  
Ion Removal ◽  
Secondary Pollution ◽  
Denitrifying Microorganisms

The process optimization and characteristics of electrode-biofilm for the treatment of copper pickling wastewater in the self-designed reactor were experimentally investigated. Carbon electrodes were installed in the reactor as the anode and cathode and denitrifying microorganisms were fixed on the surface of the cathode. The results showed that neutralization, copper ion removal, denitrification proceeded simultaneously and no secondary pollution existed. The removal rate of total nitrogen and copper ion in the effluent water reached 98% and 97% at 30mg/L of copper ion concentration and 100mg/L of nitrate nitrogen when the conditions were controlled at temperature 35°C, current density 0.1mA/cm2, hydraulic retention time 11h and C/N ration 1.07. The pH value of the treated water was increased almost to neutral. In addition, copper ion solution of certain concentration and purity could be made by exchanging the polarity of anode and cathode to recycle copper in this research.

Synthesis and Characterization of Zeolite X Obtained from Coal Gangue for Adsorption of Cu2+

2021 ◽  
Vol 13 (8) ◽  
pp. 1512-1520
Author(s):  
MiaoSen Zhang ◽  
SiYang Wang ◽  
Zheng Hu ◽  
RunZe Zhang ◽  
XiaoLi Wang
Keyword(s):  
Adsorption Capacity ◽  
Adsorption Kinetics ◽  
Ph Value ◽  
Copper Ions ◽  
Removal Rate ◽  
Coal Gangue ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Zeolite X ◽  
Initial Ph

China is a big coal producing country, there are a lot of coal gangue piled up. The zeolite X was synthesized by alkali melting and hydrothermal method based on the coal gangue from Chifeng city, Inner Mongolia. The obtained zeolite X sample is characterized by X-ray diffraction, SEM, EDS spectrum and IR which showed the X zeolite is an octahedral structure with complete crystal shape and uniform grain size. The results of BET showed the specific surface area of zeolite X is 354.8 m2/g and the minimum pore size is 3.8 nm which indicated that the zeolite X belongs to mesoporous materials. The adsorption conditions of the zeolite X adsorbent on copper ions were optimized. A solution containing Cu2+ ions with an initial concentration of 300 mg/L was added to the zeolite X with a dosage of 0.1 g and the initial pH value of the solution was adjusted to 6. Then the solution was oscillated for 120 min at 225 r/min. The maximum adsorption capacity and removal rate were 148.6 mg/g and 99.1%, respectively. The adsorption mechanism was discussed by adsorption kinetics and thermodynamics. The quasi-second order kinetic equation can be well used to describe the adsorption kinetics of zeolite X to Cu2+ (R2 = 0.9994) and Langmuir can well describe the adsorption behavior of zeolite X to Cu2+ (R2 = 0.9995) which showed the adsorption is a monolayer of chemical adsorption. The adsorption capacity of zeolite X to Cu2+ is about 4.0 times that of coal gangue, indicating that the zeolite X has good adsorption capacity.

Experimental Advancements of Wastewater Disposal in Coal Chemical Industry by Yeasts

2014 ◽  
Vol 1073-1076 ◽  
pp. 941-948
Author(s):  
Li Li Wang ◽  
Qian Yang
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Chemical Industry ◽  
Ph Value ◽  
Removal Rate ◽  
Cod Removal ◽  
Good Effect ◽  
Coking Wastewater ◽  
Torula Yeast ◽  
N Removal ◽  
Cod Removal Rate

The research in this paper focuses on improving the COD removal rate of the coking wastewater and the NH3-N removal rate and thus diversifying measures to dispose microbial floras in wastewater from the coal chemical industry. The means of adding nutrients, acid treatment and coagulation sedimentation react synergistically to dispose the organic contaminants in the coking wastewater. We attempted to combine Saccharomyces cerevisiae, Torula yeast, tropical Candida mycoderma, etc. to exploit the respective advantages to the full and improve the disposal effect. According to the COD sample (27000-30000) and NH3-N (2500-3000) offered by the client company, the COD removal rate ranged from 24.2% to 31.8% in the mixed experiment group of Saccharomyces cerevisiae and Torula yeast, with NH3-N removal rate from 63.5% to 69.6%. Obviously, the NH3-N removal rate produced good effect. Meanwhile, the COD removal rate ranged form 35.3% to 41.8% in the experiment group only adjusting PH value and the NH3-N removal rate ranged from 40.2% to 50.2%. It is obvious that NH3-N removal rate is influenced by the amount of bacterial strain.

Pretreatment of furfural industrial wastewater by Fenton, electro-Fenton and Fe(II)-activated peroxydisulfate processes: a comparative study

2014 ◽  
Vol 70 (3) ◽  
pp. 414-421 ◽  
Author(s):  
C. W. Yang ◽  
D. Wang ◽  
Q. Tang
Keyword(s):  
Comparative Study ◽  
Industrial Wastewater ◽  
Ph Value ◽  
Removal Rate ◽  
Aeration Rate ◽  
Cod Removal ◽  
Optimal Conditions ◽  
Initial Concentration ◽  
Cod Removal Rate ◽  
Pretreatment Technology

The Fenton, electro-Fenton and Fe(II)-activated peroxydisulfate (PDS) processes have been applied for the treatment of actual furfural industrial wastewater in this paper. Through the comparative study of the three processes, a suitable pretreatment technology for actual furfural wastewater treatment was obtained, and the mechanism and dynamics process of this technology is discussed. The experimental results show that Fenton technology has a good and stable effect without adjusting pH of furfural wastewater. At optimal conditions, which were 40 mmol/L H2O2 initial concentration and 10 mmol/L Fe2+ initial concentration, the chemical oxygen demand (COD) removal rate can reach 81.2% after 90 min reaction at 80 °C temperature. The PDS process also has a good performance. The COD removal rate could attain 80.3% when Na2S2O8 initial concentration was 4.2 mmol/L, Fe2+ initial concentration was 0.1 mol/L, the temperature remained at 70 °C, and pH value remained at 2.0. The electro-Fenton process was not competent to deal with the high-temperature furfural industrial wastewater and only 10.2% COD was degraded at 80 °C temperature in the optimal conditions (2.25 mA/cm2 current density, 4 mg/L Na2SO4, 0.3 m3/h aeration rate). For the Fenton, electro-Fenton and PDS processes in pretreatment of furfural wastewater, their kinetic processes follow the pseudo first order kinetics law. The pretreatment pathways of furfural wastewater degradation are also investigated in this study. The results show that furfural and furan formic acid in furfural wastewater were preferentially degraded by Fenton technology. Furfural can be degraded into low-toxicity or nontoxic compounds by Fenton pretreatment technology, which could make furfural wastewater harmless and even reusable.

The Preparation of Chitosan and its Application in the Treatment of Electroplating Wastewater

2014 ◽  
Vol 955-959 ◽  
pp. 2449-2452
Author(s):  
Liu Hui Ru ◽  
Zhong Cai Hua ◽  
Feng Rui Jun
Keyword(s):  
Wastewater Treatment ◽  
Treatment Effect ◽  
Ph Value ◽  
Removal Rate ◽  
Mixing Time ◽  
Copper Ion ◽  
Adsorption Rate ◽  
Influence Of Temperature ◽  
Electroplating Wastewater

In this paper, the chitosan was prepared for treatment of electroplating wastewater. The influence of temperature, PH value, the amount of chitosan and mixing time on the effects of the wastewater treatment was investigated. The result showed that at PH=3, with the addition of 0.6g chitosan and 2h of mixing, the optimum wastewater treatment effect can be obtained. The removal rate of COD is above 80% and the adsorption rate of copper ion is above 99%. The decolourization ratio and the turbidity indicated that the treatment is effective.

Wastewater Containing Copper Precipitation Research

2013 ◽  
Vol 368-370 ◽  
pp. 510-513
Author(s):  
Yu Heng Wang ◽  
Jin Chuan Gu ◽  
Wei Lan Lin ◽  
Wen Yuan Wang
Keyword(s):  
Ph Value ◽  
Removal Rate ◽  
Wastewater Discharge ◽  
Optimum Conditions ◽  
Solution Ph ◽  
Copper Precipitation ◽  
Reaction Solution ◽  
Stirring Time ◽  
Flocculation Process ◽  
Low Dosage

With copper wastewater as the research object, in sulfide - flocculation process, a comparative study of its wastewater treatment of copper sulfide dosage, type of flocculation, flocculation dosage, stirring time and other conditions. The results show that: in their respective optimum conditions, the flocculation PAC than PFS to pH adaptability, low dosage, copper removal rate reached 97.7%, the reaction solution pH value of 6.5, to achieve "Integrated Wastewater Discharge Standard" (GB8978-1996) emission standards.

Removal of Nonylphenol from Water by Ozone

2013 ◽  
Vol 859 ◽  
pp. 357-360 ◽  
Author(s):  
Xiao Dong Wang ◽  
Yang Lv ◽  
Meng Meng Li ◽  
Hong Ye Liu
Keyword(s):  
Reaction Time ◽  
Ozone Concentration ◽  
Degradation Rate ◽  
Ph Value ◽  
Removal Rate ◽  
Affecting Factors ◽  
Initial Concentration ◽  
Lower Temperature ◽  
Better Than

This study investigates the degradation of Nonylphenol. The degradation affecting factors including solution ozone dosage, initial concentration, pH, temperature and ultraviolet. The results indicated that when the ozone contents changes, the Nonylphenols degradation rate changes as well. The higher ozone concentration contribute to the faster degradation; With the increase of initial concentration of Nonylphenol, the removal rate of it decrease on the contrary, while with the initial concentration increases, the quality of unit ozone degradation of Nonylphenol is ascenting and then tend to a constant; The remove rate of Nonylphenol is improving when the pH value vary from 4.86~10.34. The effect of Nonylphenols ozonation in higher temperatures is better than it is in lower temperature; Ultraviolet radiation is also favorable for the removal of Nonylphenol as it can shorten the reaction time as well as reduce the amount of ozone.

Treatment Project for Wastewater from Automobile Painting

2012 ◽  
Vol 209-211 ◽  
pp. 1986-1989
Author(s):  
Yu Ping Tian ◽  
Shuang Shuang Kong
Keyword(s):  
Removal Rate ◽  
Wastewater Discharge ◽  
Quality Of Water ◽  
Air Flotation ◽  
Pre Treatment ◽  
Primary Standards ◽  
Biological Methods

In this experiment, the combination of physic-chemical and biological methods was applied. Firstly, degreasing wastewater and painting wastewater were pretreated by chemicals respectively. And the removal rate of CODCr is more than 50% and about 65% respectively. After pretreatment，the effluents together with electrophoresis wastewater were treated by the coagulation-flotation and SBR process. And the removal rate of CODCr reached more than 80%, which achieved primary standards of "Integrated Wastewater Discharge Standard"(GB8978-1996). After the separated pre-treatment, the consuming amount of the chemicals had obviously lowered than the conventional mixing treatment, as well as the sludge. Most importantly, this process ensures good quality of water. So it is feasible economically and technically to use separated pretreatment, air flotation and SBR to treat automotive painting wastewater.

scholarly journals Laser-Induced Fluorescence Detection of Copper Ion With a Rhodamine Derivative by a Capillary Electrophoresis Microchip

2009 ◽  
Author(s):  
Yong Yu ◽  
Meng Yang ◽  
Feng Shen
Keyword(s):  
Capillary Electrophoresis ◽  
Ph Value ◽  
Copper Ions ◽  
Copper Ion ◽  
Laser Induced Fluorescence Detection ◽  
Fluorescence Dye ◽  
Order Of Magnitude ◽  
Sensitive Determination ◽  
Electrophoresis Microchip

A capillary electrophoresis microchip system with a confocal LIF detector was successfully constructed. RBPhOH, a new fluorescence dye synthesized from rhodamine B, was first investigated in a glass microchip for the selective and sensitive determination of copper ion by LIF method. The influences of the pH value, concentration of running buffer, detection voltage, and sample loading time on the response of LIF detector were studied. RBPhOH dissolved in 20 mM pH 6.0 Tris containing 10% acetonitrile could detect copper ions with a detection limit of 1.34×10−7 mol L−1 (S/N=3), an order of magnitude lower than those of conductivity detectors.

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