Pulverisette 19 universal cutting mill

The pyrolysis experiments were performed with 0.25 mm PP-IG samples. The PP-IG samples were prepared from used PPEs, including isolation gowns. Next, the collected materials were shredded using FRITSCH Universal Cutting Mill PULVERISETTE 19, Idar-Oberstein, Germany, with 0.25 mm perforation sieve cassette into 0.25 mm-size PP-IG samples. The samples then were directly used for sample characterisations and experiments of laboratory-scale pyrolysis with specified parameters.
For a comprehensive overview, the PPEs, include the isolation gowns, hairnets, shoe covers, and face masks, were collected from Universiti Putra Malaysia (UPM) Healthcare Centre (PKU), UPM Serdang, Selangor, Malaysia. Priors to shredding steps, the collected waste PPEs were disinfected thoroughly under the supervision of HCWs from UPM PKU staff. Materials collected were cleaned and disinfected using normal soap meticulously. The materials were dried under direct sunlight and shredded using the abovementioned cutting mill into small powder of size ~0.25 mm for better pyrolysis experiment. Twenty g of segregated PP-IG samples were filled into a quartz boat and placed at the centre of the furnace. The elemental composition of PP plastic is as shown in Table 1.

Fresh stems (10 kg) of T. indica were collected from the local garden Taman Pertanian, Indera Mahkota, 25,200 Kuantan, Pahang DM, Malaysia. Identification of the plant was performed by the taxonomists of Taman Pertanian and Kulliyyah of Pharmacy, IIUM. Afterward, the sample was deposited in the herbarium of Kulliyyah of Pharmacy to obtain voucher specimen number (NMPC-QSTI-39) for the future references. The same plant material was compared with the already deposited specimen of the same plant.
Ten kg well cleaned fresh stems were dried in a laboratory dryer within a temperature range (30 to 40 °C) and were pulverized to a crude powdered form by applying Fritsch Universal Cutting Mill PULVERISETTE 19 (Germany) and the grinded material was made ready for the extraction process 4.7 kg (47%) to prepare ethanol extract as well as to isolate bioactive compounds [12 , 13 (link)].