Table 2: Final densities of ZnCl2:CaClz solution prepared in different batches After filtering 250 mL of fresh ZnCl2:CaCl2 solution, the filter paper was changed. used for spiking. Figure 2: PE fibers shredded into small fragments and 0.1 g weighed on a were used for spiking. | m long PE fiber was shredded into smaller fragments (Fig 2) and adjusted based on the volume and type of sample. Figure 3 and Figure 4 (left) show a running setup of BMSS with aqueous Zinc Chloride: Source: Hans Peter Arp; Dorothea Gilbert; Philip B. Hayes, NGI weight particles and the type of filter used for solution purification Thiourea solution and Hydrogen Peroxide for dissolving organic matter Table 3: Protocols for chemical digestion using Sodium hydroxide: Urea: A protocol was already developed by Linn MB Olsen and Hans Peter Arp (Norwegian Geotechnical Institute, NGI) based on chemical digestions of organic matter ~1g. The Figure 5: Google satellite image of beach sampling site Bygdoy sjobad of samples taken with a metal spoon and soil scoop, and has an area of 40*40cm?, 2cm amount of marine and anthropogenic debris was present on site. Figure 7: Sampling site in Bygddy sjgbad. A wooden ruler is placed marking an area Figure 8: (Left) Demarcating 40 * 40 cm2 on the HWM before sample collection nearest to the sea is noticeable by the accumulation of debris. tweezers were used to pick large debris. The samples were weighed again and distributed Figure 9: Samples stored in PP buckets and sorted for large debris and organic matter using hand-picking method. A pair of metal sieve and discarding debris stored in LDPE zip-lock bags Figure 13: Satellite image of sediment sample site Bekkelaget waste water treatment to 10 cm was collected using a spoon into a large polypropylene sample bucket. Figure 14: Bekkelaget WWTP sampling site F3, rich in biota was observed in the F3 sample. weighed in pre-weighed aluminum trays for introduction into the Bauta (Fig 16). glass rod was used to homogenize the samples (Fig 15) and 500 g of the samples were long stem, and a Schott bottle (250 mL) underneath (Fig 17). [he sediment chamber was inverted and supported on an iron stand over a glass funnel with is kept underneath the funnel, with the stem of the funnel inside the Schott bottle The coloration of solution was observed resulting from dissolution of cellulose the sample vials were placed inside tall plastic containers (Figure 23). accidents from overflowing solution and burns from exothermic mist during the reaction Figure 24: Impurities on blanks taken on steel mesh (45 um) and observed under a crystals retained on the steel mesh. (Appendix 2) Figure 25: (Left) Introduction of PE powder in the separation chamber. Figure 26: (Left) PE fibers stuck to the Bauta glass column wall at the constriction (Right) PE powder stuck to the Bauta glass column wall. e recovery rates of three PE fiber replicates with their standard deviations (s.d). Figure 27: Recovery rates of PE fibers replicates from CaCl2 solution with standard Figure 29: Precipitate of ZnCl2: CaCl2 on GF/C glass fiber filter in sea waters (d=1.03 g/mL). powder from spiked laboratory sand (grain size 0.2-0.7mm, d = 2.6 g/mL). environmental samples. Figure 31: Recovery rates (%) with standard deviation of LDPE pellets, HDPE water mark region on the beach where most of the marine debris accumulate.
