Efficient removal of arsenic using plastic waste char: Prevailing mechanism and sorption performance

Singh, Ekta; Kumar, Avanish; Khapre, Abhishek; Saikia, Purabi; Shukla, Sushil Kumar; Kumar, Sunil

doi:10.1016/j.jwpe.2019.101095

Cited by 56 publications

(26 citation statements)

References 44 publications

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“…Moderate pyrolysis was performed in the presence of nitrogen (N2) at a flow rate of 1 L min -1 at 450 °C and 550 °C at 8 °C min -1 of heating rate to convert each feedstock of 60 g of into char. The final temperature was held for 10 min, similar to that of Singh et al (2020). The char was then sieved to achieve 0.5-1.0 mm size and dried at 105 °C for 18 hr and this was used for any further analysis.…”

Section: Methodsmentioning

confidence: 99%

Pyrolysis of waste biomass and plastics for production of biochar and its use for removal of heavy metals from aqueous solution

Singh

Kumar

Mishra

et al. 2021

Bioresource Technology

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133

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The aim of this work was to study the pyrolysis of waste biomass and plastics and use the produced biochar for the removal of heavy metals from aqueous solution. The batch experiments of Fe, Ni, Cu, Cr, Cd and Pb with biochars and plastic chars were carried for determining the effects of various experimental parameters (feedstock, contact time, adsorbent dose, pH and pyrolysis temperature). The isothermal sorption models demonstrated that the sorption capacities of biochars are higher in comparison to the plastic chars. The maximum removal efficiency shown by biochars and plastic chars at pH 4 was 99.86% and 99.93%, respectively. Both the carbon materials are thereby recognized as an environment-friendly and efficient pollutant control material at various studied parameters.

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Section: Methodsmentioning

confidence: 99%

Pyrolysis of waste biomass and plastics for production of biochar and its use for removal of heavy metals from aqueous solution

Singh

Kumar

Mishra

et al. 2021

Bioresource Technology

Self Cite

133

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“…In the reactor, it's essentially the unburned plastic that is left behind after the process is completed. [175][176][177] The char characteristics from HDPE plastic waste pyrolysis were studied by Jamradloedluk and Lertsatitthanakorn. [178] The major elements observed were fixed carbon and volatile matter, whereas ash and moisture were in minimum amounts.…”

Section: Char From Waste Plasticsmentioning

confidence: 99%

“…The char generated could also be utilized for a variety of environmental and energy usages including that in boilers, a feedstock for activated carbon production and heavy metal adsorption (Figure 3 and Table 6). [179] PVC, PET and PE were used by Singh et al [176] in their study for producing plastic char and use as an adsorbent for Arsenic (As) adsorption. In N 2 atmosphere, at heating rate of 8°C min À 1 , all samples were pyrolyzed at 450, 550, and 650°C.…”

Section: Char From Waste Plasticsmentioning

confidence: 99%

Utilization of Plastic Wastes for Sustainable Environmental Management: A Review

et al. 2021

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The advancement and modernization of industries have provided numerous benefits to human life including diversification of manufacturing a wide range of products made from plastic materials, thereby leading to the generation of huge quantities of plastic waste. Owing to the increasing issues related with plastic waste, recycling methods have attracted much interest. Recycling not only protects the environment and resources for future generations but also reduces energy consumption and greenhouse gas emissions. A wide range of valuable products including char, oil, fuels, sorbent materials, and chemicals can be obtained through different techniques. This Review highlights various sustainable research avenues and potential routes to reduce the environmental impact of plastic waste based on both traditional and potential approaches for its utilization.

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“…Martin -Lara et al (2021) carried out research using a waste mixture of polypropylene (PP), polystyrene (PS), and polyethylene film (PE) and observed that pyrolysis temperature has a great impact on the yield of solid products. With the increase of pyrolysis temperature, the adsorption capacity of solid char obtained from the pyrolysis process also increases reaching a maximum of 7.91 mg/g at 550 0 C. Singh et al, (2020) was conducted an experiment for adsorbing arsenic by plastic char derived from pyrolysis of waste Polyvinyl chloride (PVC), Polyethylene terephthalate (PET), and Polyethylene (PE). Among all the plastic char's tests performed, PE and PVC mixed char had maximum As removal rate, ranging from 71.6 to 99.4%, and PE and PET chars showed the lowest amount of sorption ranging from 12.4 to 32.5%.…”

Section: Introductionmentioning

confidence: 99%

Use of Waste Plastic Char as Adsorbent for Removal of Arsenic and COD from Aqueous Solution

Dutta

Gupta

2022

Preprint

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In present study, the solid char derived from the pyrolysis of waste high-density polyethylene (HDPE) and polypropylene (PP) was tested for removal (adsorption) of inorganic arsenic (As5+) and organic matters (COD) from water and wastewater, respectively. It was observed that the solid char could remove 60% of arsenic (+5) at a dose of 4 gm/L for a contact time of 30 min and the COD removal was 50% at a dose of 4 gm/L with a contact time of 25 min. In both cases the adsorption data was found to fit better with Langmuir model. The adsorption capacity of mixed plastic char for As5+ was observed to be in the range of 1.45 – 1.75 mg/gm and in the range of 60.625-67.9 mg/gm for COD. Proximate and ultimate analysis indicated that the pyrolytic char had a large quantity of volatile matter (46.50-48.0%), carbon (41.3–84.7%), and a small amount of moisture (1.2-2.5%). The calorific value and density of plastic char were found to be in the range of 13.50-17.50 MJ/kg and 1.55 - 1.60 gm/m3. FTIR spectra of mixed HDPE and PP waste pyrolytic oil showed the presence of mostly alkanes and alkenes. It was found that with the increase of pyrolysis temperature, the pore size of solid char increased. The XRD pattern of the plastic chars obtained in this study showed sharp diffraction crystalline peaks. The plastic char can be used for further research for removal of other contaminants from aqueous solution.

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Efficient removal of arsenic using plastic waste char: Prevailing mechanism and sorption performance

Cited by 56 publications

References 44 publications

Pyrolysis of waste biomass and plastics for production of biochar and its use for removal of heavy metals from aqueous solution

Pyrolysis of waste biomass and plastics for production of biochar and its use for removal of heavy metals from aqueous solution

Utilization of Plastic Wastes for Sustainable Environmental Management: A Review

Use of Waste Plastic Char as Adsorbent for Removal of Arsenic and COD from Aqueous Solution

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