Impact of Different Sorting Media on the Waste Plastics Separation

Abstract:

This research established a density separation system by using sorting media such as calcium chloride solution (CaCl₂), sodium chloride solution (NaCl) and ethyl alcohol solution (C₂H₅OH) to study the density separation experiment involving nine different waste plastics. The results showed that PVC(or POM or PET), PC, PA6, PS(or ABS), HDPE and PP could be progressively separated from their mixtures by CaCl₂(1.3005g/mL), NaCl (1.1604g/mL), NaCl (1.0861g/mL), tap water (0.9969g/mL) and C₂H₅OH(0.9039g/mL) with a 100% of sorting rate, respectively.

• Periodical: Applied Mechanics and Materials (Volume 692)
• Pages: 84-89
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.692.84
• Online since: November 2014
• Authors: Xiao Li, Yu Wen Guo*, Jiu Li Ruan, Qi Qiao, Jian Qiang Zhang
• Keywords: Density, Medium, Recycle, Separation, Waste Plastics

References

[1] Carvalho T, Durão F, Ferreira C. Separation of packaging plastics by froth flotation in a continuous pilot plant[J]. Waste management, 2010, 30(11): 2209-2215.

DOI: 10.1016/j.wasman.2010.05.023

[2] Guo Huixin. Experimental study on waste electrical and electronic equipment plastics recycling technology of the shell[D]. Southwest Jiaotong University. 2013. (in chinese).

[3] Pongstabodee S, Kunachitpimol N, Damronglerd S. Combination of three-stage sink–float method and selective flotation technique for separation of mixed post-consumer plastic waste[J]. Waste management, 2008, 28(3): 475-483.

DOI: 10.1016/j.wasman.2007.03.005

[4] Xing Z, Xu H, Wu C. Study on HDPE/PP Mixture Recycled with Sink-float Separation Method[J]. Suliao Keji(Plastics Science and Technology), 2012, 40(2): 60-63. (in chinese).

[5] Dodbiba G, Haruki N, Shibayama A, et al. Combination of sink–float separation and flotation technique for purification of shredded PET-bottle from PE or PP flakes[J]. International Journal of Mineral Processing, 2002, 65(1): 11-29.

DOI: 10.1016/s0301-7516(01)00056-4

[6] Takoungsakdakun T, Pongstabodee S. Separation of mixed post-consumer PET–POM–PVC plastic waste using selective flotation [J]. Separation and Purification Technology, 2007, 54(2): 248-252.

DOI: 10.1016/j.seppur.2006.09.011

[7] Abbasi M, Salarirad M M, Ghasemi I. Selective separation of PVC from PET/PVC mixture using floatation by tannic acid depressant[J]. Iranian Polymer Journal, 2010, 19(7): 483-489.

[8] Okuda T, Kurose K, Nishijima W, et al. Separation of polyvinyl chloride from plastic mixture by froth flotation after surface modification with ozone[J]. Ozone: Science and Engineering, 2007, 29(5): 373-377.

DOI: 10.1080/01919510701572907

[9] Shen H, Pugh R J, Forssberg E. Floatability, selectivity and flotation separation of plastics by using a surfactant[J]. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2002, 196(1): 63-70.

DOI: 10.1016/s0927-7757(01)00706-3

[10] Saitoh K, Nagano I, Izumi S. New separation technique for waste plastics[J]. Resource Recovery and Conservation, 1976, 2(2): 127-145.

DOI: 10.1016/0304-3967(76)90004-4