Integrated removal of nonionic surfactant and cobalt(II) from plating rinse water

Snukiškis, J.; Kaušpėdienė, Danutė

doi:10.1016/j.colsurfa.2004.09.042

Cited by 9 publications

(3 citation statements)

References 9 publications

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“…An adlayer with the appropriate thickness can stabilize the particles against the attractive van der Waals forces through mechanisms such as steric hindrance. In this study, steric stabilisation was performed in suspensions of Lutensol, which is used in miniemulsion polymerization [30,31] and heavy metal ion sorption [32,33]. Lutensol possesses a long chain alkyl tail (18 carbons) and a -C 2 H 4 O-head group able to anchor itself strongly onto the surface of the nanoparticle.…”

Section: 221steric Stabilizationmentioning

confidence: 99%

Effect of ultrasonication and dispersion stability on the cluster size of alumina nanoscale particles in aqueous solutions

Nguyen¹,

Rouxel²,

Hadji³

et al. 2011

Ultrasonics Sonochemistry

187

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This study deals with the deagglomeration of nanoparticles in low concentration suspensions in water, protic polar solvent for polymers such as poly(vinyl alcohol) (PVA). The influence of the main parameters of ultrasonication such as time, power and irradiation modes (continuous, pulsed) on the cluster size of aluminium oxide nanoparticles 1 mg/ml in aqueous solutions was investigated. Power-law dependence of size reduction on ultrasonic time was observed. The study indicated an optimum power input, i.e. at higher vibration amplitude the break up of nanoparticle clusters was no better and there was a risk of reagglomeration occurring during a long ultrasonication. Under optimal conditions, continuous and pulsed irradiations showed almost the same efficiency of deagglomeration over a given time. This result provides alternative operating conditions for attaining the smallest size of the alumina aggregates in suspension. The influence of stabilization on the cluster size was also studied. Alumina nanoparticles were stabilized by electrostatic forces against reagglomeration without the need for dispersants, and the enhancement of dispersion stability using electrostatic, steric effects had no significant effect on the aggregate size. On the contrary, the adsorption of high molecular weight polyelectrolytes onto the particle surface could lead to reagglomeration due to material bridges between particle surfaces and even flocculation.

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Section: 221steric Stabilizationmentioning

confidence: 99%

Effect of ultrasonication and dispersion stability on the cluster size of alumina nanoscale particles in aqueous solutions

Nguyen¹,

Rouxel²,

Hadji³

et al. 2011

Ultrasonics Sonochemistry

187

View full text Add to dashboard Cite

show abstract

“…Cobalt is essential for human health under permissible limits as it is one of the constituents of vitamin B 12 [5]. However, Co(II) may cause bronchial infection, diarrhea, cardiomyopathy and dermatological disorders if present in amounts greater than the permissible limits [6], which are set at 0.05 and 0.002 mg/L for irrigation and drinking water, respectively [7].…”

Section: Introductionmentioning

confidence: 99%

Sorption studies of manganese and cobalt from aqueous phase onto alginate beads and nano-graphite encapsulated alginate beads

Khan

Jung

Kwon

et al. 2014

Journal of Industrial and Engineering Chemistry

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“…As a result of its high toxicity, the removal of cobalt from industrial effluents is of major concern. The permissible concentration of cobalt(II) in the sewage effluents is 500 mg L À1 in Lithuania [4]. The maximum limits of cobalt in irrigation water and livestock watering are 50 and 1000 mg L À1 , respectively (Working water quality guidelines for British Columbia, Ministry of Environment) (www.env.gov.bc.ca/ wat/wq/BCguidelines/working.html).…”

Section: Introductionmentioning

confidence: 99%

Electrogenerative Removal of Cobalt from Sulfate Solutions Using a Batch Reactor

Tan

Mohamed

2011

CLEAN Soil Air Water

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The electrogenerative removal of cobalt is conducted in a batch reactor equipped with three-dimensional electrodes: Reticulated vitreous carbon (RVC) and porous graphite (PG-25) as cathode materials. In this process, a chemical reaction takes place spontaneously in a divided cell where cobalt is reduced at the cathode and zinc is oxidized to produce electrical energy without an external supply of energy. The results obtained show that RVC serves as a more suitable cathode material than PG-25 in this system. At optimum conditions, more than 99% of cobalt were removed and recovered in its metallic state after 10 h of operation with an initial 200 mg L À1 Co(II) solution at pH 4 in 0.2 M Na 2 SO 4 and 0.4 M boric acid. Scanning electron microscopy and X-ray diffraction analyses are performed to study the morphology and crystallographic patterns of cobalt deposits on the cathodes, respectively.

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Integrated removal of nonionic surfactant and cobalt(II) from plating rinse water

Cited by 9 publications

References 9 publications

Effect of ultrasonication and dispersion stability on the cluster size of alumina nanoscale particles in aqueous solutions

Effect of ultrasonication and dispersion stability on the cluster size of alumina nanoscale particles in aqueous solutions

Sorption studies of manganese and cobalt from aqueous phase onto alginate beads and nano-graphite encapsulated alginate beads

Electrogenerative Removal of Cobalt from Sulfate Solutions Using a Batch Reactor

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