Chemical Recycling of Expanded Polystyrene Waste: Synthesis of Novel Functional Polystyrene‐Hydrazone Surface for Phenol Removal

Siyal, Ali N.; Memon, Saima Q.; Parveen, Sajida; Soomro, Asma; Khaskheli, Mazhar Iqbal; Khuhawar, Muhammad Yar

doi:10.1155/2013/842435

Cited by 14 publications

(18 citation statements)

References 26 publications

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“…OSC for 2 pieces are more than that of one piece all over the sorption times. This is probably due to increase of surface area of two pieces compare to one piece (Sadik et al 2012, Tanobe et al 2009). The same reason for 4 pieces compare to two pieces.…”

Section: Resultsmentioning

confidence: 99%

“…Cutting the EPS with a serrated edge knife will made a rougher surface than that cut with sharp edge knife, possibly with a higher surface area (Tanobe et al 2009). Table 3, shows the OSC of crude oil (oil only) of EPS pieces cut with serrated edge knife via sorption time (5-120 min).…”

Section: Resultsmentioning

confidence: 99%

“…The same trend, there are increasing in OSC with increasing of sorption time and sorbent pieces. That due to diffusion of more oil into the sorbent pores with the contact times (Choi and Cloud 1992) and increases of surface area of sorbent with increasing of EPS pieces (Tanobe et al 2009). …”

Section: Figure 2-oil's Wet Eps Piece Cut Horizontally To Two Pieces mentioning

confidence: 99%

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Utilization of Expanded Polystyrene EPS Waste as Sorbent for Oil Spill Cleanup

Nasir¹,

Hameed²

2014

Day 3 Wed, November 12, 2014

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EPS is a major constituent of plastic waste. Reuse of waste EPS which is non-biodegradable, to useful products is a way of effective waste management. Oil is one of the most important energy sources but oil spill accidents often take place during the oil utilization process, resulting in threats to the environment. We report the use of EPS waste to obtain an adsorbent material to cleanup crude oil spill from water. The effects of major factors such as sorption time, adsorbent surface areas, kind of surface (smooth or rough) and thermo-modification and mechanical modification (punching holes) were investigated. The experiments carried out with about 0.900 g EPS sorbent were tested for oil sorption for 5 to 120 min at 400 g oil only and at 50 g oil over 800 mL water surface. Oil sorption increases with increasing the sorption time's and surface areas. Surface areas increase with cutting the EPS pieces with serrated edge knife or/and cutting the EPS to 2, 4, 6 and 8 pieces.Oil sorption capacity (OSC) increased with increasing surface area, and so two pieces have OSC of 1.733 g/g more than one piece of 1.208 g/g of the same weight (0.900 g) and sorption time (5 min). Rough surface of EPS adsorbed more oil than smooth surface. Most of adsorptions were taking place at first 5-15 min. Thermo-modification (50-90°C) has no significant effect on oil sorption. Making holes by punching nails (0.1 mm diameter) into EPS contributed to increases OSC to 2.538 g/g for 5 min sorption time (1 piece). Increasing the nails diameter to 1.65 mm resulted to increase in OSC to 3.280 g/g for 5 min sorption time (1 piece) and 7.998 g/g for 6 pieces. The results of investigation indicated that the oil sorption mechanism of EPS waste meanly adsorption with slow capillary action. Oleophilic action between EPS and oil is the mean force governing the oil adsorption into EPS. The use of EPS waste in oil spill cleanup will reduce pollution in two ways. Reducing the garbage and oil spill remediation.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Utilization of Expanded Polystyrene EPS Waste as Sorbent for Oil Spill Cleanup

Nasir¹,

Hameed²

2014

Day 3 Wed, November 12, 2014

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“…BPA is able to create a hydrogen bonding between compound and membrane surface [34]. In addition, the highest degree of adsorption was observed at neutral pH; for Siyal et al [33], it was pH 7, and for Adamczak et al, it was pH 6.5 [17]. As already mentioned, the high BPA and END retention were due to the properties of the substances themselves.…”

Section: Modified Membranes Characteristicmentioning

confidence: 87%

“…In many works, polystyrene acts as a phenol adsorbent in technological processes. For example, Siyal et al [33] achieved removal of 75% to almost 90% of phenols from industrial wastes by the use of modified polystyrene. This demonstrates the high capacity of this polymer to remove these types of compounds as well as the adsorption potential of phenols themselves.…”

Section: Modified Membranes Characteristicmentioning

confidence: 99%

Application of Waste Polymers as Basic Material for Ultrafiltration Membranes Preparation

Adamczak

Kamińska

Bohdziewicz

2020

Water

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Polystyrene is a polymer commonly used in civil engineering as styrofoam for building isolation. It is also used in the packaging of glass and sensitive products such as electronics, household products, and other goods. Single-use products such as cups and plates made from synthetic materials are important for waste management. All of these products are responsible for the creation of 6200 kt of waste in 2015 alone. Quite a new idea of the application of styrofoam waste is to use it as basic material for preparation of membranes, which are widely used for water reclamation. Nowadays, membranes are prepared from different, non-waste polymers like polysulfone, poly(ether sulfone), polyacrylonitrile, and others. The aim of this study was to prepare polystyrene waste ultrafiltration membrane and assess its usage to treat river surface water. Conducted tests have been divided into two stages: the first part tested four membranes with different concentrations of waste polymer in order to determine the membrane with the most favorable properties. In the second part, selected membrane was modified with single-walled carbon nanotubes functionalized with hydroxyl groups in three different concentrations. The ultrafiltration process was conducted in a dead-end system under pressure of 0.1 MPa. The obtained results suggest that the ultrafiltration membranes with waste styrofoam guarantee similar treatment effects as with the usage of membranes made with other polymers or commercial membranes.

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