Dissolved Air Flotation

Wang, Lawrence K.; Fahey, Edward; Wu, Zucheng

doi:10.1385/1-59259-820-x:431

“…The toxicity of such metal ions arise due to their non-biodegradable nature thereby accumulating in the living cells and impairing the normal functions of various organs of living beings. Technologies like chemical precipitation, electrochemical separation, membrane separation, reverse osmosis, ion exchange and adsorption resins though effective for metal remediation, yet are not competitive in industrial application [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Such methods involve either large capital or operational costs, and are not effective in removing metal ions present in ppm levels [12,18].…”

Section: Introductionmentioning

confidence: 99%

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

Gupta

¹

,

Nayak

²

,

Agarwal

³

2015

Environmental Engineering Research

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The biosorption process has been established as characteristics of dead biomasses of both cellulosic and microbial origin to bind metal ion pollutants from aqueous suspension. The high effectiveness of this process even at low metal concentration, similarity to ion exchange treatment process, but cheaper and greener alternative to conventional techniques have resulted in a mature biosorption technology. Yet its adoption to large scale industrial wastewaters treatment has still been a distant reality. The purpose of this review is to make in-depth analyses of the various aspects of the biosorption technology, staring from the various biosorbents used till date and the various factors affecting the process. The design of better biosorbents for improving their physico-chemical features as well as enhancing their biosorption characteristics has been discussed. Better economic value of the biosorption technology is related to the repeated reuse of the biosorbent with minimum loss of efficiency. In this context desorption of the metal pollutants as well as regeneration of the biosorbent has been discussed in detail. Various inhibitions including the multi mechanistic role of the biosorption technology has been identified which have played a contributory role to its non-commercialization.

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“…Technologies like chemical precipitation, electrochemical separation, membrane separation, reverse osmosis, ion exchange and adsorption resins though effective for metal remediation, yet are not competitive in industrial application [9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Such methods involve either large capital or operational costs, and are not effective in removing metal ions present in ppm levels [12,18]. Chemical precipitation involves large generation of harmful sludge which requires further treatment thereby increasing the overall cost.…”

Section: Introductionmentioning

confidence: 99%

Adsorption isotherm and kinetics analysis of hexavalent chromium and mercury on mustard oil cake

Reddy

¹

,

Chauhan

²

,

Chakraborty

³

2016

Environmental Engineering Research

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The biosorption process has been established as characteristics of dead biomasses of both cellulosic and microbial origin to bind metal ion pollutants from aqueous suspension. The high effectiveness of this process even at low metal concentration, similarity to ion exchange treatment process, but cheaper and greener alternative to conventional techniques have resulted in a mature biosorption technology. Yet its adoption to large scale industrial wastewaters treatment has still been a distant reality. The purpose of this review is to make in-depth analyses of the various aspects of the biosorption technology, staring from the various biosorbents used till date and the various factors affecting the process. The design of better biosorbents for improving their physico-chemical features as well as enhancing their biosorption characteristics has been discussed. Better economic value of the biosorption technology is related to the repeated reuse of the biosorbent with minimum loss of efficiency. In this context desorption of the metal pollutants as well as regeneration of the biosorbent has been discussed in detail. Various inhibitions including the multi mechanistic role of the biosorption technology has been identified which have played a contributory role to its non-commercialization.

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“…A flotação é utilizada para separar os sólidos ou líquidos dispersos em uma fase líquida a partir da adesão bolha-partícula (WANG et al, 2004). As partículas anexas com os metais pesados são separadas à medida que vão subindo a superfície.…”

Section: D) Flotaçãounclassified

Remoção De Cromo De Banhos Residuais De Curtimento Através De Precipitação Química E Eletrocoagulação

Mella¹,

Glanert²,

Gutterres³

2015

Anais Do XX Congresso Brasileiro De Engenharia Química

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Dissolved Air Flotation

Cited by 55 publications

References 34 publications

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

Bioadsorbents for remediation of heavy metals: Current status and their future prospects

Adsorption isotherm and kinetics analysis of hexavalent chromium and mercury on mustard oil cake

Remoção De Cromo De Banhos Residuais De Curtimento Através De Precipitação Química E Eletrocoagulação

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