Tetrabromobisphenol A recovery from computer housing plastic by a new solvothermal process

Zhang, Congcong; Sahajwalla, Veena; Zhang, Fu-Shen

doi:10.1007/s10311-014-0452-8

Cited by 8 publications

(6 citation statements)

References 20 publications

(26 reference statements)

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“…139,140 Recently, the process has been employed for the treatment of plastics as an alternative to inefficient and unsustainable practices such as incineration and landfilling. 141 Karmore and Madras 142 examined the supercritical degradation and kinetics of PS using benzene in a 450 cm 3 high-pressure stirred batch reactor by varying the temperature from 300 to 330 C and fixed pressure of 5 MPa. The results showed that the supercritical conditions significantly improved the degradation rates as evident in the degradation rate coefficients and activation energies, which are two times higher than values reported at similar temperatures and pressures for subcritical solvents.…”

Section: Solvent/solvothermal Treatmentmentioning

confidence: 99%

“…The results showed that the supercritical conditions significantly improved the degradation rates as evident in the degradation rate coefficients and activation energies, which are two times higher than values reported at similar temperatures and pressures for subcritical solvents. Other studies have also examined the recovery and removal of harmful compounds and substances from plastics through solvothermal treatment 132,141 as a substitute to conventional processes, such as Soxhlet, supercritical fluid, pressurized liquid, and microwave-assisted extraction. The most notable toxic, recalcitrant and bio-accumulative pollutants in plastic wastes are tetrabromobisphenol A (TBBPA), PBDE, and hexabromocyclododecane (HBCDD), which are broadly classified as brominated flame retardants (BFRs), whereas triphenyl phosphate (TPPO) is a organophosphorus flame retardant (PFR).…”

Section: Solvent/solvothermal Treatmentmentioning

confidence: 99%

“…The most notable toxic, recalcitrant and bio-accumulative pollutants in plastic wastes are tetrabromobisphenol A (TBBPA), PBDE, and hexabromocyclododecane (HBCDD), which are broadly classified as brominated flame retardants (BFRs), whereas triphenyl phosphate (TPPO) is a organophosphorus flame retardant (PFR). 141,143 Zhang and Zhang 132 employed the solvothermal approach to remove TBBPA from e-wastes using ethanol, isopropanol, and methanol solvents. The bromine-free plastic was obtained at the optimal conditions; temperature (90 C), extraction time (120 min) and the ratio of solvent to plastic (15:1) using methanol.…”

Section: Solvent/solvothermal Treatmentmentioning

confidence: 99%

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Emerging trends in sustainable treatment and valorisation technologies for plastic wastes in Nigeria: A concise review

Nyakuma

Ivase²

2021

Env Prog and Sustain Energy

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The article presents an overview of the status, challenges, and prospects of current and emerging trends for the sustainable treatment and valorisation technologies of plastic wastes. The proliferation is ascribed to the growing population, living standards, and use of low cost, unbiodegradable, and chemically resistant plastic wastes in Nigeria. This scenario is exacerbated by the lack of comprehensive strategies for the collection, transport, segregation, and management of plastic wastes. Currently, plastic wastes treatment is accomplished by open-air burning, dumping, and landfilling. More advanced technologies, such as thermal (incineration, gasification), chemical (catalytic cracking and selective dissolution), and biological (microbial degradation) methods, are also utilized for treatment and valorisation. However, these high-cost, obsolete, and inefficient technologies result in GHG emissions, toxic fumes, toxins and leachates. Hence, novel technologies for the reuse, recycling, reduction, and valorisation of plastic wastes must emphasize energy, materials, and resource recovery. The article proposes the upcycling of plastic wastes into carbon nanomaterials (carbon microspheres, carbon nanofibers (CNFs), graphene flakes, carbon nanotubes), polymeric composite materials (wood-polyethylene composites, wood-fiber-reinforced plastics), biocrude/bio-oil, fuels, chemicals, and char through solvent/solvothermal treatment and plasma conversion. Solvent/solvothermal treatment can effectively treat and upcycle plastic wastes along with the removal of toxic, recalcitrant and bio-accumulative pollutants such as brominated flame retardants and organophosphorus flame retardants. However, the study identified numerous challenges that currently hamper plastic wastes disposal, management, and valorisation. Hence, sustainable and socially friendly approaches for plastic waste management and valorisation are required to address their short-and long-term impacts on human health, safety and the environment in Nigeria.

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Section: Solvent/solvothermal Treatmentmentioning

confidence: 99%

Section: Solvent/solvothermal Treatmentmentioning

confidence: 99%

Section: Solvent/solvothermal Treatmentmentioning

confidence: 99%

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Emerging trends in sustainable treatment and valorisation technologies for plastic wastes in Nigeria: A concise review

Nyakuma

Ivase²

2021

Env Prog and Sustain Energy

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“…Packaging is used to preserve food quality and provide hygiene safety for the consumer (Zhang et al 2014;Wang et al 2019;Gaikwad et al 2019). It helps in the handling, transportation, and storage by protecting food products from physical (crushing, abrasions, and shocks), chemical (ultraviolet radiations), and biological (microorganism) damage (Al-Tayyar et al 2020a;Youssef et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Renewable cellulosic nanocomposites for food packaging to avoid fossil fuel plastic pollution: a review

et al. 2020

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The extensive use of petroleum-based synthetic and non-biodegradable materials for packaging applications has caused severe environmental damage. The rising demand for sustainable packaging materials has encouraged scientists to explore abundant unconventional materials. For instance, cellulose, extracted from lignocellulosic biomass, has gained attention owing to its ecological and biodegradable nature. This article reviews the extraction of cellulose nanoparticles from conventional and non-conventional lignocellulosic biomass, and the preparation of cellulosic nanocomposites for food packaging. Cellulosic nanocomposites exhibit exceptional mechanical, biodegradation, optical and barrier properties, which are attributed to the nanoscale structure and the high specific surface area, of 533 m2 g−1, of cellulose. The mechanical properties of composites improve with the content of cellulose nanoparticles, yet an excessive amount induces agglomeration and, in turn, poor mechanical properties. Addition of cellulose nanoparticles increases tensile properties by about 42%. Barrier properties of the composites are reinforced by cellulose nanoparticles; for instance, the water vapor permeability decreased by 28% in the presence of 5 wt% cellulose nanoparticles. Moreover, 1 wt% addition of filler decreased the oxygen transmission rate by 21%. We also discuss the eco-design process, designing principles and challenges.

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“…Toxic liquids and residues of landfills leak contaminate the groundwater. Over the past few decades, recycling and re‐utilization of waste plastics attract more attention because it avoids their accumulation in landfills …”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Decomposition of Strongly Acidic Cation‐Exchange Resin to Valuable Compounds Using Subcritical Water in Alkaline Media

Rezakazemi

Tavakoli

2020

ChemistrySelect

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In this research, hydrothermal technology was used to decompose a strongly acidic Na+ form cation‐exchange resin, DIAION SK1B, containing a crosslinking moiety and a styrene moiety at subcritical water conditions in an alkaline media to obtain decomposed products that can be quickly separated, efficiently collected and recycled. The decomposed materials subjected to a liquid‐solid separation to obtain an aqueous phase containing a salt of a material with an alkali. Two different acids (formic acid and acetic acid) were introduced to the aqueous phase to precipitate the materials and then added to a water‐insoluble solvent to yield materials, to dissolve the precipitated materials into the solvent to obtain a solution containing the materials to be gathered. However, the experiment was performed in a tubular reactor and heated by a salt‐bath. The effects of reaction time, temperature, additives concentration as alkali catalyst and pH of the aqueous solutions on the degradation rate of sulfonated resin were investigated. It was found out that 350°C, 120 min, and 0.05 M NaOH is the optimum condition to attain complete decomposition of this resin. The maximum yield of formic acid in aqueous phase obtained from batch reactor experiments was occurred at optimum conditions. Total organic carbon (TOC) of the aqueous phase reached (38%) to its maximum value at optimum condition. More than 60% of the cation exchange resin was decomposed at optimum condition.

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Tetrabromobisphenol A recovery from computer housing plastic by a new solvothermal process

Cited by 8 publications

References 20 publications

Emerging trends in sustainable treatment and valorisation technologies for plastic wastes in Nigeria: A concise review

Emerging trends in sustainable treatment and valorisation technologies for plastic wastes in Nigeria: A concise review

Renewable cellulosic nanocomposites for food packaging to avoid fossil fuel plastic pollution: a review

Hydrothermal Decomposition of Strongly Acidic Cation‐Exchange Resin to Valuable Compounds Using Subcritical Water in Alkaline Media

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