Flotation separation of polyethylene terephthalate from waste packaging plastics through ethylene glycol pretreatment assisted by sonication

Wang, Kangyu; Zhang, Yingshuang; Zhong, Yiwei; Luo, Maozhi; Du, Yichen; Wang, Ling; Wang, Hui

doi:10.1016/j.wasman.2020.02.021

Cited by 26 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PET bottle was proven to be safer than the aluminum bottle for packing herbal oils. The contact between PET plastics and phenolic compounds was safe, as PET plastics did not react with phenyl ring groups (Wang et al 2020). Also, PET plastic packaging was able to inhibit olive oil oxidation for 30 days of storage time at 40°C.…”

Section: Detection Of Main Antibacterial Compoundsmentioning

confidence: 99%

Impact of using low-cost packaging material of commercial herbal oil on its antibacterial compounds

2020

View full text Add to dashboard Cite

A commercial herbal oil with different bottle materials on the Indonesian markets was studied. The effects of the different specimens viz. PET-new, PET-open, and AL-new on the main antibacterial components of herbal oil were investigated.Step-1, analysis of antibacterial activity (against S. aureus and E. coli) and testing of non-toxic (in-vivo).Step-2, detection of the main antibacterial compounds (6 types) during the storage times. The market and environmental aspects were also considered. The results, all specimens had antibacterial activity and they showed non-toxic. At the 0-month, six types of main antibacterial compounds were detected in all specimens. The longer the storage time, the more main antibacterial compounds were lost. The most loss (4 types) was observed in and PET-open. PET-new showed the least loss (1 type) at 6-months and 12-months, namely eugenol. Interestingly, PET-new was able to retain curcumene, farnesol, and p-cymene for up to 12 months of storage. PET-new was also more economical (8.7% cheaper) and environmental-friendly than AL-new. The sprayer cap types are strongly recommended for PET herbal oil packaging.

show abstract

Section: Detection Of Main Antibacterial Compoundsmentioning

confidence: 99%

Impact of using low-cost packaging material of commercial herbal oil on its antibacterial compounds

2020

View full text Add to dashboard Cite

show abstract

“…The role played by medium density in the sinking-floating separation technique is a key parameter to separate plastic particles (Fu et al 2017 ). For example, PE and PP, as lightweight plastics, can be easily separated by density sorting in the medium of water, while PVC and PET, as heavy plastics, are considered unmanageable plastic blends due to their similar density (Wang et al 2020 ). In this study, separation with tap water made the polyolefins separate easily, since these polymers have specific densities lighter than those of water (Ito et al 2010 ).…”

Section: Discussionmentioning

confidence: 99%

Separation of virgin plastic polymers and post-consumer mixed plastic waste by sinking-flotation technique

Quelal

Velázquez‐Martí

Gisbert

2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

The main objective of this research is to separate virgin polymers (PA, PC, PP, HDPE; PS, and ABS) and post-consumer plastic waste from municipal solid waste (MSW) using the sinking-flotation technique. Separation was carried out on a pilot scale in an 800-l useful volume container with 160 rpm agitation for one hour. Tap water, ethanol solutions, and sodium chloride at different concentrations were used as densification medium. Virgin polymers were separated into two groups: low-density (HDPE and PP) and high-density polymers groups (PS, ABS, PA, and PC). Polymers whose density was less than that of the medium solution floated to the surface, while those whose density was greater than those of the medium solution sank to the bottom. The experimental results showed that complete separation of HDPE from PP achieved 23% ethanol v/v, whereas high-density polymers separated up to 40% w/v sodium chloride. Polymer recovery ranged from 70 to 99.70%. In post-consumer recycled plastic waste, fractions of 29.6% polyolefins, 37.54% PS, 11% ABS, 8% PA, 12% PC PET, and PVC were obtained. Finally, cast plates were made of the post-consumer waste to properly identify the polymer type present in the separated fractions.

show abstract

“…This method takes advantage of the phenomenon of different electrical permeability of separated plastics, which is an indirect measure of the ability of a given plastic to accumulate electrostatic charge on its surface as a result of friction with another plastic. This method of electrification creates the possibility of application of electrostatic separation for a wide range of materials, including poly(ethylene terephthalate) (PET), polychloride vinyl (PVC) and high-density polyethylene (PE-HD) [23][24][25][26]. In the third stage, the mixture is separated in a strong electrostatic field depending on the size and polarity of the electrostatic charge accumulated on the surface of the separated polymer material [27].…”

Section: Electrostatic Separation Methodsmentioning

confidence: 99%

Tribo-Electrostatic Separation Analysis of a Beneficial Solution in the Recycling of Mixed Poly(Ethylene Terephthalate) and High-Density Polyethylene

et al. 2021

View full text Add to dashboard Cite

The aim of this study was to investigate and analyze the impact of selected parameters during the tribocharging process of shredded poly(ethylene terephthalate) (PET) and high-density polyethylene (PE-HD) plastics on accumulated electric charge and electrostatic separation effectiveness. The accumulation of electric charge on surfaces of polymer particles as a result of their circular motion forced by the airflow cyclone container was investigated. The impact of the container material, time of tribocharging and the airflow intensity were experimentally examined. A container in which the particles of the considered polymers are electrified with opposite charges was selected. A high ability to accumulate surface charge on small particles of both polymers was demonstrated. The electrified mixed PET/PE-HD was subjected to a separation process. An electrostatic separator designed and constructed by the authors was used for to the separation. In turn, to assess the effectiveness of this separation, a dedicated vision system was used. Based on the result of the carried out tests, it has been assumed that the proposed approach’s effectiveness has been demonstrated by means of empirical validation.

show abstract

Flotation separation of polyethylene terephthalate from waste packaging plastics through ethylene glycol pretreatment assisted by sonication

Cited by 26 publications

References 29 publications

Impact of using low-cost packaging material of commercial herbal oil on its antibacterial compounds

Impact of using low-cost packaging material of commercial herbal oil on its antibacterial compounds

Separation of virgin plastic polymers and post-consumer mixed plastic waste by sinking-flotation technique

Tribo-Electrostatic Separation Analysis of a Beneficial Solution in the Recycling of Mixed Poly(Ethylene Terephthalate) and High-Density Polyethylene

Contact Info

Product

Resources

About