Potential of thermal treatment for decontamination of mercury containing wastes from chlor-alkali industry

Busto, Yailen; Cabrera, Xiomara; Tack, Filip; Verloo, Marc

doi:10.1016/j.jhazmat.2010.10.099

Cited by 61 publications

(25 citation statements)

References 17 publications

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“…The procedures applied to sampling, sample preparation and chemical analysis have been described in a previous paper [10].…”

Section: Sampling and Chemical Analysismentioning

confidence: 99%

“…The sample was then transferred into a 100 ml standard volumetric flask. The digestion was performed using the same procedure as previously described for total Hg in the waste sample [10].…”

Section: Mercury Fractionationmentioning

confidence: 99%

“…A quantification of the total mercury removal was conducted at different temperatures, 250, 350 and 450 • C, and reaction times, 5,10,15,20,25,30,40,50,60,90, 120 and 150 min.…”

Section: Thermal Treatmentmentioning

confidence: 99%

“…Our samples required the use of acetic acid. Details of the procedure can be found in a previous contribution [10].…”

Section: Thermal Treatmentmentioning

confidence: 99%

“…According to USEPA [9], thermal treatment represents the most suitable technology for 'high mercury wastes'. The potential of this approach to decontaminate the mercury containing wastes from the chlor-alkali industry in Cuba has been investigated in a previous contribution [10].…”

Section: Introductionmentioning

confidence: 99%

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An investigation on the modelling of kinetics of thermal decomposition of hazardous mercury wastes

Busto

Peralta

Cabrera

et al. 2013

Journal of Hazardous Materials

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h i g h l i g h t s• A reaction mechanism of thermal treatment of hazardous mercury waste is postulated.• The kinetic model for the thermal decomposition of mercury solid waste is deduced.• A methodology to investigate reaction order models in solid systems is proposed.• The thermal decomposition of mercury waste is described by two modelling approaches. a r t i c l e i n f o t r a c tThe kinetics of mercury removal from solid wastes generated by chlor-alkali plants were studied. The reaction order and model-free method with an isoconversional approach were used to estimate the kinetic parameters and reaction mechanism that apply to the thermal decomposition of hazardous mercury wastes. As a first approach to the understanding of thermal decomposition for this type of systems (poly-disperse and multi-component), a novel scheme of six reactions was proposed to represent the behaviour of mercury compounds in the solid matrix during the treatment. An integration-optimization algorithm was used in the screening of nine mechanistic models to develop kinetic expressions that best describe the process. The kinetic parameters were calculated by fitting each of these models to the experimental data. It was demonstrated that the D 1 -diffusion mechanism appeared to govern the process at 250• C and high residence times, whereas at 450 • C a combination of the diffusion mechanism (D 1 ) and the third order reaction mechanism (F 3 ) fitted the kinetics of the conversions. The developed models can be applied in engineering calculations to dimension the installations and determine the optimal conditions to treat a mercury containing sludge.

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“…The procedures applied to sampling, sample preparation and chemical analysis have been described in a previous paper [10].…”

Section: Sampling and Chemical Analysismentioning

confidence: 99%

Section: Mercury Fractionationmentioning

confidence: 99%

“…A quantification of the total mercury removal was conducted at different temperatures, 250, 350 and 450 • C, and reaction times, 5,10,15,20,25,30,40,50,60,90, 120 and 150 min.…”

Section: Thermal Treatmentmentioning

confidence: 99%

“…Our samples required the use of acetic acid. Details of the procedure can be found in a previous contribution [10].…”

Section: Thermal Treatmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An investigation on the modelling of kinetics of thermal decomposition of hazardous mercury wastes

Busto

Peralta

Cabrera

et al. 2013

Journal of Hazardous Materials

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Exploitation of Soil Amendments to Remediate Heavy Metal Toxicity for Safe Cultivation of Crops

Naorem¹,

Patel²,

Udayana³

2022

Microbial Biotechnology

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Mercury removal from spent low‐level mercury catalyst by thermal treatment

Liu

Ping

et al. 2021

Can J Chem Eng

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Spent low-level mercury catalyst (SLMC) from the polyvinyl chloride industry is a mercury-containing hazardous waste. Thermal treatment technology was used to detoxify SLMC and recover mercury in this paper. Effects of flow rate of nitrogen, treatment temperature, and time on mercury removal efficiency were estimated 99.91% of total mercury was removed when SLMC was treated at 600 C for 30 min with 120 L/h of nitrogen. SLMC could be detoxified after being treated at 350 C for 120 min, 400 C for 60 min, or 450 C for 10 min based on the TCLP test. Migration rule of mercury during thermal treatment was analyzed by using improved sequential extraction procedure. Soluble and exchangeable mercury, and mercury combined with labile organics, were removed more easily than HgS and mercury combined with non-labile organics. Removal process of total mercury followed a first-order kinetic model. The experimental results may be useful for disposing of SLMC using thermal treatment in engineering practise.

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Potential of thermal treatment for decontamination of mercury containing wastes from chlor-alkali industry

Cited by 61 publications

References 17 publications

An investigation on the modelling of kinetics of thermal decomposition of hazardous mercury wastes

An investigation on the modelling of kinetics of thermal decomposition of hazardous mercury wastes

Exploitation of Soil Amendments to Remediate Heavy Metal Toxicity for Safe Cultivation of Crops

Mercury removal from spent low‐level mercury catalyst by thermal treatment

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