Characterization of Sardinian Bentonite

Mannu, Alberto; Vlachopoulou, Georgia; Sireus, Veronica; Mulas, G.; Petretto, Giacomo Luigi

doi:10.20944/preprints201808.0128.v1

Cited by 3 publications

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“…The above characteristics combined with the absence of arsenic, zinc and copper are the main reasons for considering bentonite of a great interest on industrial applications [19]. Recently, as part of a study on the recycling of waste cooking oils [20] we reported some IR and XRD studies of this bentonite, confirming the excellent quality of the material [9]. As the distribution of the superficial area, as well as the size and the volume of the pores are within the most important parameters in clay´s characterization, we employed N 2 physisorption technique for the measurement of the external surface area according to the Brunauer-Emmett-Teller (BET) equation [21].…”

Section: Resultsmentioning

confidence: 58%

“…In the case of edible oils, filtration on a pad of activated bentonite allows to remove cations, wax and pigments. Additionally, waste cooking oils can be treated with bentonite for decolouring procedure [9]. Bentonite has also been employed for water treatment, as resulted efficient in adsorbing organic matter and in retaining Fe [10][11][12] or copper [13], or for retain pollutants in industrial wastewaters as the O-cresol [14].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Sardinian Bentonite

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The employment of clays in industry and on laboratory scale is still of interest, despite their long history. The chemical-physical characteristics of such materials are strongly related to their geographical origin and the availability of proper characterization techniques is of great importance in order to gain as more information about their behavior when utilized as filling materials. In the present contribution, a physical characterization by meaning of Thermogravimetry and N2 physisorption analyses of samples of bentonite collected from the deposit of S´Aliderru in the north of Sardinia (Italy) is reported.

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Section: Resultsmentioning

confidence: 58%

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confidence: 99%

Characterization of Sardinian Bentonite

et al. 2019

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“…Fast food restaurants in big cities in China can produce cooking oil waste of about 15 litres every day [4]. In the Mediterranean country, one person produces 3-5 kg WCO each year [5]. A survey in the Greater Jakarta area concluded that 1,889,506 tons of waste cooking oil was dumped in the gutters and soil every week.…”

Section: Introductionmentioning

confidence: 99%

Eco-efficiency Level of Production Process of Waste Cooking Oil to be Biodiesel with Life Cycle Assessment

et al. 2020

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Lack of awareness and knowledge of environmental protection, many people discard cooking oil waste. According to several studies, cooking oil waste can be processed into more valuable products through certain processes that require energy and material. Biodiesel is an example. Beside biodiesel, the production process also produces non-product output. Thus, efforts to utilize cooking oil waste into more valuable products also have a negative impact on the environment. This study aims to measure the environmental impact of biodiesel production from waste cooking oil and compare it if it is discharged to landfill without the recycling process. Measurement of environmental impacts is carried out using a Life Cycle Assessment. Measurement of the environmental impact of biodiesel processing from cooking oil waste is based on a process carried out at a research institute. The measurement results state that the disposal of cooking oil waste has an adverse effect on the ecotoxicity category. Whereas the processing of cooking oil waste into biodiesel has advantages in the categories of climate change, the formation of photochemical oxidants, fine dust, oil and gas depletion, and water pressure indicators. the level of eco efficiency from processing waste cooking oil to biodiesel produces a value close to one which means that the production process is affordable but not yet sustainable.

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Recycling of Waste Cooking Oils: Variation of the Chemical Composition during Water Treatment

Mannu¹,

Ferro²,

Dugoni³

et al. 2019

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Samples of sunflower Waste Cooking Oils (WCOs) subjected to several cycles of frying were treated with water under four different combinations of temperature and pH. The variation of the chemical composition of the oil samples was monitored through headspace Solid-Phase Microextraction (HS-SPME) coupled with gas-chromatographic technique (GC), 1H NMR spectroscopy and ESI+ mass spectrometry measurements. The possibility to modify the chemical composition of the recycled vegetable oil by tuning the water treatment parameters was exploited for the designing of a mini-plant for the production of bio-lubricants. A full description of the proposed prototype is also reported.

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Characterization of Sardinian Bentonite

Cited by 3 publications

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Characterization of Sardinian Bentonite

Characterization of Sardinian Bentonite

Eco-efficiency Level of Production Process of Waste Cooking Oil to be Biodiesel with Life Cycle Assessment

Recycling of Waste Cooking Oils: Variation of the Chemical Composition during Water Treatment

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