Faradaic reactions in capacitive deionization for desalination and ion separation

Abstract Capacitive deionization (CDI) is a promising and rapidly growing technology for water treatment and the electrode materials play a key role in improving CDI performance. In this study, high surface area activated carbon was prepared from chicken feather (CF) bio-waste through pyrolysis and KOH activation; the KOH:CF ratio (R) and activation temperature (Ta) were variable parameters. The material was characterized by using the Brunauer, Emmett and Teller (BET) method, Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The lead (Pb2+) removal test was performed with a CDI cell containing the fabricated carbon electrode and 100 mg L−1 Pb(NO3)2 solution; the sample prepared with the ratio R of 1:1 and Ta = 800 °C exhibited higher Pb2+ removal efficiency of 81% and electro sorption capacity of 4.1 mg g−1 at the electrode potential 1.2 V and flow rate 5 mL min−1. Therefore, CF-derived carbon is considered as a promising CDI electrode material for removal of heavy metals from waste water.

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Highly porous N-doped graphene nanosheets for rapid removal of heavy metals from water by capacitive deionization

Chemical Communications ◽

10.1039/c6cc08515f ◽

2017 ◽

Vol 53 (5) ◽

pp. 881-884 ◽

Cited By ~ 49

Author(s):

Lianjun Liu ◽

Xiaoru Guo ◽

Rebecca Tallon ◽

Xingkang Huang ◽

Junhong Chen

Keyword(s):

Heavy Metals ◽

Graphene Nanosheets ◽

Capacitive Deionization ◽

Efficient Removal ◽

Graphene Nanosheet ◽

Removal Of Heavy Metals ◽

Doped Graphene ◽

Rapid Removal ◽

Multiple Heavy Metals ◽

Highly Porous

Highly porous N-doped graphene nanosheet-based capacitive deionization for rapid and efficient removal of multiple heavy metals from water.

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Individual and competitive removal of heavy metals using capacitive deionization

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2015.09.064 ◽

2016 ◽

Vol 302 ◽

pp. 323-331 ◽

Cited By ~ 99

Author(s):

Zhe Huang ◽

Lu Lu ◽

Zhenxiao Cai ◽

Zhiyong Jason Ren

Keyword(s):

Heavy Metals ◽

Capacitive Deionization ◽

Removal Of Heavy Metals

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Biosorption: An Eco-Friendly Technique for the Removal of Heavy Metals

Indian Journal Of Applied Research ◽

10.15373/2249555x/dec2012/1 ◽

2011 ◽

Vol 2 (3) ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Sasmita Sabat ◽

◽

R V Kavitha R V Kavitha ◽

Shantha S L Shantha S L ◽

Gopika Nair ◽

...

Keyword(s):

Heavy Metals ◽

Removal Of Heavy Metals

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The removal of heavy metals from dredged sediments by mechanical Denver flotation: the contribution of true flotation and entrainment

Land Contamination & Reclamation ◽

10.2462/09670513.844 ◽

2007 ◽

Vol 15 (1) ◽

pp. 15-30 ◽

Cited By ~ 8

Author(s):

Mathias Vanthuyne ◽

André Maes

Keyword(s):

Heavy Metals ◽

Dredged Sediments ◽

Removal Of Heavy Metals

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Study of the Cu(II) removal from aqueous solutions by adsorption on titania

Global NEST Journal ◽

10.30955/gnj.000717 ◽

2013 ◽

Vol 12 (3) ◽

pp. 239-247

Keyword(s):

Heavy Metals ◽

Ionic Strength ◽

Toxic Metals ◽

Low Cost ◽

Lateral Interaction ◽

Tio2 Surface ◽

High Toxicity ◽

Removal Of Heavy Metals ◽

Solution Parameters ◽

Kinetics Of

The removal of heavy metals from wastewaters is a matter of paramount importance due to the fact that their high toxicity causes major environmental pollution problems. One of the most efficient, applicable and low cost methods for the removal of toxic metals from aqueous solutions is that of their adsorption on an inorganic adsorbent. In order to achieve high efficiency, it is important to understand the influence of the solution parameters on the extent of the adsorption, as well as the kinetics of the adsorption. In the present work, the adsorption of Cu(II) species onto TiO2 surface was studied. It was found that the adsorption is a rapid process and it is not affected by the value of ionic strength. In addition, it was found that by increasing the pH, the adsorbed amount of Cu2+ ions and the value of the adsorption constant increase, whereas the value of the lateral interaction energy decreases.

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