Treatment of air pollution control residues with iron rich waste sulfuric acid: Does it work for antimony (Sb)?

Okkenhaug, Gudny; Breedveld, Gijs D.; Kirkeng, Terje; Lægreid, Marit; Mæhlum, Trond; Mulder, Jan

doi:10.1016/j.jhazmat.2012.12.041

Cited by 18 publications

(15 citation statements)

References 39 publications

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“…However, the activity of free laccase remained only 15% of its initial activity. The results confirmed that the immobilized laccase on nano-porous silica could effectively retain its activity and stability [6,23,35]. …”

Section: Resultsmentioning

confidence: 53%

“…Moreover, pre-test analysis in pH 3.0 showed that the activity of immobilized enzyme versus free type retained 62% and 28%, respectively, and in alkaline pH (pH ≈ 8.0) the immobilized laccase kept its activity about 60–70% of its maximum activity, while free laccase was almost inactive. Catapane et al also showed that the optimal pH for free and immobilized laccase on PAN (Poly Acrylo Nitrile) was about 5, however the activity of immobilized enzyme in pH range of 3 to 7 was retained significantly, in compare with free enzyme [23]. …”

Section: Resultsmentioning

confidence: 99%

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Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads

Dehghanifard

Jafari

Kalantary

et al. 2013

J Environ Health Sci Engineer

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Many organic hazardous pollutants, including 2,4-dinitrophenol (2,4-DNP), which are water soluble, toxic, and not easily biodegradable make concerns for environmental pollution worldwide. In the present study, degradation of nitrophenols-contained effluents by using laccase immobilized on the nano-porous silica beads was evaluated. 2,4-DNP was selected as the main constituent of industrial effluents containing nitrophenols. The performance of the system was characterized as a function of pH, contact time, temperature, pollutant, and mediator concentrations. The laccase-silica beads were employed in a mixed-batch reactor to determine the degradation efficiency after 12 h of enzyme treatment. The obtained data showed that the immobilized laccase degraded more than 90% of 2,4-DNP within 12 h treatment. The immobilization process improved the activity and sustainability of laccase for degradation of the pollutant. Temperatures more than 50°C reduced the enzyme activity to about 60%. However, pH and the mediator concentration could not affect the enzyme activity. The degradation kinetic was in accordance with a Michaelis–Menten equation with Vmax and Km obtained as 0.25–0.38 μmoles/min and 0.13–0.017 mM, respectively. The stability of the immobilized enzyme was maintained for more than 85% of its initial activity after 30 days. Based on the results, it can be concluded that high resistibility and reusability of immobilized laccase on CPC-silica beads make it considerable choice for wastewater treatment.

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Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads

Dehghanifard

Jafari

Kalantary

et al. 2013

J Environ Health Sci Engineer

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“…In Denmark incineration with energy recovery has long been the chosen strategy for handling of municipal solid waste except for a few fractions like glass, paper, metal and hazardous waste which are sorted out at the source. Around 100,000 t of fly ash and APC residues characterized as hazardous waste are produced annually [1] and exported to Norway [2] or Germany [3] where they are placed in abandoned mines at controlled conditions. The hazard of the material arises from high amounts of mobile toxic elements -in particular Pb and Zn; and salts -in particular Cl; as well as from trace quantities of toxic organic compounds [4,5].…”

Section: Introductionmentioning

confidence: 99%

Electrodialytic upgrading of three different municipal solid waste incineration residue types with focus on Cr, Pb, Zn, Mn, Mo, Sb, Se, V, Cl and SO4

Jensen

Kirkelund

Pedersen

et al. 2015

Electrochimica Acta

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“…To overcome the disadvantages mentioned above, we developed an integrated progress based on the strong adsorption ability of in situ flocs and the excellent rejection efficiency of UF membranes. Although previous studies reported that iron salts exhibited strong affinity toward Sb [22][23][24], aluminum salts were also investigated in this work after considering the corresponding membrane fouling degree. In this integrated system, flocs were totally suspended in the membrane tank by aeration from the bottom, so that they could be fully utilized.…”

Section: Introductionmentioning

confidence: 99%

Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal

Wang

Liu

et al. 2017

Journal of Membrane Science

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A B S T R A C TAntimony (Sb) is harmful to human health, and Sb(V) is much more difficult to remove from water than other toxic elements such as arsenic (As). Theoretical studies have suggested that in situ flocs have stronger adsorption ability toward heavy metals than pre-made adsorbents. We believe that rational design of in situ flocs and the associated device structure will enable a floc-based device to be utilized in the removal of heavy metals. Based on this concept, we developed an integrated process taking advantage of the strong adsorption abilities of in-situ Al or Fe hydrolytic flocs and excellent separation properties of ultrafiltration (UF) membranes. We found that flocs could be well dispersed in a membrane tank with aeration from the bottom, and Fe-based flocs performed better in removing Sb(V) and alleviating membrane fouling than Al-based flocs. We also demonstrated that higher Sb (V) removal efficiency was induced with continuous injection, and lower solution pH. By controlling the aeration rate, injection frequency and the solution pH, membrane fouling was alleviated, especially under weakly acidic conditions. Additionally, owing to the higher rejection efficiency of the UF membrane, the effluent quality was improved, including the iron concentration, turbidity, and chromaticity. This innovative separation method shows promising potential for application in removing heavy metals in water treatment.

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Treatment of air pollution control residues with iron rich waste sulfuric acid: Does it work for antimony (Sb)?

Cited by 18 publications

References 39 publications

Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads

Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads

Electrodialytic upgrading of three different municipal solid waste incineration residue types with focus on Cr, Pb, Zn, Mn, Mo, Sb, Se, V, Cl and SO4

Synergistic process using Fe hydrolytic flocs and ultrafiltration membrane for enhanced antimony(V) removal

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