Additional steps in mechanical recyling of PET

Mancini, Sandro Donnini; Schwartzman, Jonas Age Saide; Nogueira, Alex Rodrigues; Kagohara, Dennis Akira; Zanin, M.

doi:10.1016/j.jclepro.2009.09.004

Cited by 35 publications

(28 citation statements)

References 7 publications

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“…Efficient and conscious usage of raw materials: PET recycling (keyword found in ref. [13]), materials selection (in ref. [7]).…”

Section: Cp Relevant Aspects Addressed In This Special Issuementioning

confidence: 99%

“…Reduced emissions and impacts: PET recycling (in ref. [13]), Ecodesign (in refs. [6,7]), ''End-of-life'' approaches (in ref.…”

Section: Cp Relevant Aspects Addressed In This Special Issuementioning

confidence: 99%

“…Implementation of closed-loop systems for materials: PET recycling (in ref. [13]), Remanufacturing (in ref. [6]), ''End-oflife'' approaches (in ref.…”

Section: Cp Relevant Aspects Addressed In This Special Issuementioning

confidence: 99%

“…Adoption of environmentally directed, technological solutions through integration with research work: PET recycling (in ref. [13]), chemical washing (in ref. [13]), Innovation (in ref.…”

Section: Integration Of Renewable Sources To the Processes: Fuelmentioning

confidence: 99%

See 3 more Smart Citations

The roles of cleaner production in the sustainable development of modern societies: an introduction to this special issue

Bonilla

Almeida

Giannetti

et al. 2010

Journal of Cleaner Production

120

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“…Efficient and conscious usage of raw materials: PET recycling (keyword found in ref. [13]), materials selection (in ref. [7]).…”

Section: Cp Relevant Aspects Addressed In This Special Issuementioning

confidence: 99%

“…Reduced emissions and impacts: PET recycling (in ref. [13]), Ecodesign (in refs. [6,7]), ''End-of-life'' approaches (in ref.…”

Section: Cp Relevant Aspects Addressed In This Special Issuementioning

confidence: 99%

“…Implementation of closed-loop systems for materials: PET recycling (in ref. [13]), Remanufacturing (in ref. [6]), ''End-oflife'' approaches (in ref.…”

Section: Cp Relevant Aspects Addressed In This Special Issuementioning

confidence: 99%

“…Adoption of environmentally directed, technological solutions through integration with research work: PET recycling (in ref. [13]), chemical washing (in ref. [13]), Innovation (in ref.…”

Section: Integration Of Renewable Sources To the Processes: Fuelmentioning

confidence: 99%

See 2 more Smart Citations

The roles of cleaner production in the sustainable development of modern societies: an introduction to this special issue

Bonilla

Almeida

Giannetti

et al. 2010

Journal of Cleaner Production

120

View full text Add to dashboard Cite

“…PET bottles were chosen as a substrate thanks to their wide availability (PET being the most favorable packaging material world-wide for beverages [7]) and possibility of easy chemical modification. It is important to clarify that since the recycling of PET bottles usually implies their destruction in order to obtain pellets to be molded or monomers to be polymerized [8], here we prefer the term "re-use".…”

Section: Introductionmentioning

confidence: 99%

A Proof-of-Concept Portable Water Purification Device Obtained from PET Bottles and a Magnetite-Carbon Nanocomposite

Gaita¹,

Evangelisti

Panzarasa

2018

Recycling

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Widespread access to potable water is still far from being granted to populations of developing countries, especially in rural zones. For this reason, the development of easy-to-make, easy-to-use water purification devices is a topic of great social and economic importance. Poly(ethylene terephthalate) (PET) bottles are available worldwide, even in the remotest and poorest countries, as testified by the increasingly common practice of re-using bottles for solar water disinfection (SODIS). Here, we demonstrate how PET bottles could be re-used as a proof-of-concept water purification system. In this way, virtually the same bottle could be used first for SODIS and then for removing chemical contaminants. In the proposed approach, the bottles are treated with ethylenediamine to introduce amine groups, which are subsequently protonated with dilute acid. These functional groups allow the stable adsorption of a magnetite-activated carbon nanocomposite, which is prepared by a simple coprecipitation protocol. The efficiency of the nanocomposite and of the resulting prototype to remove model inorganic and organic pollutants (hexavalent chromium, industrial dyes) from water has been demonstrated. The proposed purification device is easy, cheap, and effective, all factors which could promote its use in developing and rural countries.

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Solid‐state hydrolysis of postconsumer polyethylene terephthalate after plasma treatment

Mancini

Nogueira

Rangel

et al. 2012

J of Applied Polymer Sci

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Plasma treatments were applied on the surface of postconsumer polyethylene terephthalate (PET) bottles to increase their wettability and hasten the subsequent hydrolysis process. Sixty-four treatments were tested by varying plasma composition (oxygen and air), power (25-130 W), pressure (50-200 mTorr), and time (1 and 5 min). The best treatment was the one applied in air plasma at 130 W and 50 mTorr for 5 min, as it provided the lowest contact angle, 9.4 . Samples of PET before and after the optimized plasma condition were subjected to hydrolysis at 205 C. Although the treatment changed only a thin surface layer, its influence was evident up to relatively high conversion rates, as the treated samples presented more than 40% higher conversion rates than the untreated ones after 2 h of reaction. Infrared spectroscopy showed that the terephthalic acid obtained from 99% of depolymerization was similar to the commercial product used in PET synthesis.

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Additional steps in mechanical recyling of PET

Cited by 35 publications

References 7 publications

The roles of cleaner production in the sustainable development of modern societies: an introduction to this special issue

The roles of cleaner production in the sustainable development of modern societies: an introduction to this special issue

A Proof-of-Concept Portable Water Purification Device Obtained from PET Bottles and a Magnetite-Carbon Nanocomposite

Solid‐state hydrolysis of postconsumer polyethylene terephthalate after plasma treatment

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