Synchronous Concentrating and Purifying Dilute Nickel Wastewater by Electrodeionization Technology

2011 ◽  
Vol 233-235 ◽  
pp. 351-354 ◽  
Author(s):  
Hui Xia Lu ◽  
Jian You Wang ◽  
Shao Feng Bu
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Applied Voltage ◽  
Stream Flow ◽  
Heavy Metal Ions ◽  
Pure Water ◽  
Operating Parameters ◽  
Feed Water ◽  
Water Production ◽  
Flow Rates

Applicable configuration alteration of the electrodeionization （EDI）process commonly for pure water production was carried out to treat dilute nickel wastewater in this paper. The effects of major operating parameters such as applied voltage, dilute and concentrate stream flow rates on the performance of EDI process were investigated systematically. The results showed that, with the feed water containing 50mg·L-1 Ni2+ and pH of 5.7, the dilute resistivity of the EDI could reach higher than 1.0MΩ·cm which gave a Ni2+ rejection more than 99.8% while the Ni2+ was concentrated as high as 1564mg·L-1 in the concentrate stream by optimizing the operating parameters. It was indicated that pure water production and concentrating of heavy metal ions could be simultaneously accomplished via EDI technology just in one process, valuable heavy metal and water resource could be recovered as well.

Effects of Feed Water Conditions on Performance of Electrodeionization Process for Removal of Ni2+ from Dilute Solution

2012 ◽  
Vol 502 ◽  
pp. 174-178
Author(s):  
Hui Xia Lu ◽  
Shao Feng Bu ◽  
Jian You Wang
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Water Reuse ◽  
Heavy Metal Ions ◽  
Pure Water ◽  
Synthetic Wastewater ◽  
Feed Water ◽  
Separation Performance ◽  
Water Conditions ◽  
And Diffusion

Electrodeionization (EDI) is being applied more and more to treat wastewater containing heavy metal ions, especially for electroplating rinsing wastewater. The effects of feed water conditions including concentration, pH and temperature on the performance of EDI process for removal of Ni2+ from dilute synthetic wastewater were investigated systematically in this paper. It was found that the dilute resistivity of the EDI module descended from 1.5-2.8MΩ•cm to 0.36-0.45MΩ•cm while the influent Ni2+ concentration increased from 45 mg•L-1to 63mg•L-1. Existence of some H+ in feed water would push the stack current up. An increase in temperature of feed water would facilitate the ion exchange and diffusion and thus promote mass transfer. It was indicated that feed water conditions had a significant effect on separation performance of EDI process for treating dilute solutions containing heavy metal ions. Pure water production could be accomplished and water reuse could be realized via EDI technology by appropriately restricting feed water conditions.

A Technique Method of Recycling Waste Liquid in the Sulfate Copper Plating Technological Experiment in the Laboratory

2013 ◽  
Vol 706-708 ◽  
pp. 500-503
Author(s):  
Shi Lei
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Low Cost ◽  
Pure Water ◽  
Chemical Deposition ◽  
Semipermeable Membrane ◽  
Copper Plating ◽  
Comprehensive Utilization ◽  
Technological Experiment

It introduces a kind of technique method that recycling waste liquid in the sulfate copper plating technological experiment in the laboratory, involving the fields in electroplating and comprehensive utilization of waste liquid. This process includes the following steps: first filter the waste liquid to remove impurities in it, and then using electrolytical method to recycle copper in the waste liquid. Add NaOH, NaHSO3 into the solution, through chemical deposition remove heavy metal ions in the waste liquid, and carry on the harmlessization handle to sediments, finally deal with the waste liquid through a semipermeable membrane to get pure water. This process provides a kind of simple, easy to operate, low cost method for the treatment with waste liquid of electroplating produced in the laboratory, which is toxic and pollute the environment.

scholarly journals An approach to remove heavy met al ions in certain aqueous solutions and waste water by means of suit able matrices and chelators

2019 ◽  
pp. 257-262
Author(s):  
Göran Lindgren
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Human Body ◽  
Trace Analysis ◽  
Heavy Metal Ions ◽  
High Flow ◽  
Flow Rates

The increasing amount of heavy metal ions in nature might not yet be a serious problem,However some of the heavy metals Le_ cadmium, mercury, arsenate (semi-metal) and highconcentrations of copper and zinc are clearly toxic to the human body,The present investigation deals with removal of heavy metal ions in aqueous solution, Differentcarriers designed for trace analysis as well as for high flow rates will be discussed,

Bioadsorption of Multiple Heavy Metal Ions by Rhizophora Apiculate sp. and Elaesis Guineensis sp.

2017 ◽  
Vol 14 (1) ◽  
pp. 15
Author(s):  
M.B. Nicodemus Ujih ◽  
Mohammad Isa Mohamadin ◽  
Milla-Armila Asli ◽  
Bebe Norlita Mohammed
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Agricultural Waste ◽  
Living Organism ◽  
Heavy Metal Concentration ◽  
Industrial Area ◽  
Electrochemical Treatment ◽  
Chemical Oxidation

Heavy metal ions contamination has become more serious which is caused by the releasing of toxic water from industrial area and landfill that are very harmful to all living organism especially human and can even cause death if contaminated in small amount of heavy metal concentration. Currently, peoples are using classic method namely electrochemical treatment, chemical oxidation/reduction, chemical precipitation and reverse osmosis to eliminate the metal ions from toxic water. Unfortunately, these methods are costly and not environmentally friendly as compared to bioadsorption method, where agricultural waste is used as biosorbent to remove heavy metals. Two types of agricultural waste used in this research namely oil palm mesocarp fiber (Elaesis guineensis sp.) (OPMF) and mangrove bark (Rhizophora apiculate sp.) (MB) biomass. Through chemical treatment, the removal efficiency was found to improve. The removal efficiency is examined based on four specification namely dosage, of biosorbent to adsorb four types of metals ion explicitly nickel, lead, copper, and chromium. The research has found that the removal efficiency of MB was lower than OPMF; whereas, the multiple metals ions removal efficiency decreased in the order of Pb2+ > Cu2+ > Ni2+ > Cr2+.

Comparative Bio-sorption of Cadmium and Nickel Ions from Aqueous Solution onto Fibers of Date Palm using Fluidized Bed Column

2019 ◽  
Vol 70 (5) ◽  
pp. 1507-1512
Author(s):  
Baker M. Abod ◽  
Ramy Mohamed Jebir Al-Alawy ◽  
Firas Hashim Kamar ◽  
Gheorghe Nechifor
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Metal Ions ◽  
Fluidized Bed ◽  
Removal Efficiency ◽  
Heavy Metal Ions ◽  
Date Palm ◽  
Operating Conditions ◽  
Initial Concentration ◽  
Bed Height

The aim of this study is to use the dry fibers of date palm as low-cost biosorbent for the removal of Cd(II), and Ni(II) ions from aqueous solution by fluidized bed column. The effects of many operating conditions such as superficial velocity, static bed height, and initial concentration on the removal efficiency of metal ions were investigated. FTIR analyses clarified that hydroxyl, amine and carboxyl groups could be very effective for bio-sorption of these heavy metal ions. SEM images showed that dry fibers of date palm have a high porosity and that metal ions can be trapped and sorbed into pores. The results show that a bed height of 6 cm, velocity of 1.1Umf and initial concentration for each heavy metal ions of 50 mg/L are most feasible and give high removal efficiency. The fluidized bed reactor was modeled using ideal plug flow and this model was solved numerically by utilizing the MATLAB software for fitting the measured breakthrough results. The breakthrough curves for metal ions gave the order of bio-sorption capacity as follow: Cd(II)]Ni(II).

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