Abstract

The separation of an individual plastic from a plastics mix is crucial in plastic recycling management. The selected plastics available in municipal and industrial wastes, including polycarbonate (PC), poly oxy methylene (POM), and acrylonitrile butadiene styrene (ABS) pre-irradiated with microwaves for different microwave power %’s at several irradiation times. The irradiated plastics subsequently conditioned with selected depressants with different concentrations before introducing into the flotation tank. The effects of the above-mentioned parameters evaluated on the float-sink behavior of the studied plastics. It revealed that the pre-microwave irradiation of the plastic surface was influential on the float-sink performance of the studied plastics. The microwave irradiation changed the numbers, capacity, and concentration of the active sites on the plastic surface. The microwave irradiation reduced θ (contact angle) values of the un-conditioned plastic surface with studied depressants for all used plastics resulted in increasing the hydrophilic property of the surface of the plastics. It concluded that different mechanisms, individually or together, involved for depressant adsorption–desorption on a plastic surface. The microwave pre-irradiation for some plastics and depressants was beneficial for plastic flotation whenever for other samples, it helped the plastic to sink at the bottom of the flotation tank. The suggested equations by Design-Expert® software to predict the plastic flotation % versus studied parameters conformed with experimental results appropriately.

Graphic abstract

中文翻译：

---

微波辐射对所选聚合物浮选的影响，作为塑料回收的潜在解决方案

摘要

从塑料混合物中分离出单个塑料对于塑料回收管理至关重要。选定的市政和工业废物中可用的塑料，包括聚碳酸酯（PC），聚甲醛（POM）和丙烯腈丁二烯苯乙烯（ABS），在不同的照射时间下已用不同的微波功率％进行了微波预辐照。随后将被辐照的塑料与选定浓度不同的抑制剂一起调理，然后将其引入浮选罐。评估上述参数对所研究塑料的浮沉性能的影响。结果表明，塑料表面的微波预照射对所研究塑料的浮沉性能有影响。微波辐射改变了数量，容量，以及塑料表面上活性部位的浓度。微波辐射通过对所有使用过的塑料进行研究的抑制剂降低了未调节塑料表面的θ（接触角）值，从而提高了塑料表面的亲水性。结论是，在塑料表面上，吸附剂的吸附或脱附涉及到不同的机制，无论是单独的还是共同的。微波预辐照某些塑料和抑制剂对其他样品的浮选都是有益的，它有助于塑料沉入浮选槽的底部。Design-Expert®软件建议的方程式，用于预测塑料浮选百分比与研究参数的关系，与实验结果相符。微波辐射通过对所有使用过的塑料进行研究的抑制剂降低了未调节塑料表面的θ（接触角）值，从而提高了塑料表面的亲水性。结论是，在塑料表面上，吸附剂的吸附或脱附涉及到不同的机制，无论是单独的还是共同的。微波预辐照某些塑料和抑制剂对其他样品的浮选都是有益的，它有助于塑料沉入浮选槽的底部。Design-Expert®软件建议的方程式，用于预测塑料浮选百分比与研究参数的关系，与实验结果相符。微波辐射通过对所有使用过的塑料进行研究的抑制剂降低了未调节塑料表面的θ（接触角）值，从而提高了塑料表面的亲水性。结论是，在塑料表面上，吸附剂的吸附或脱附涉及到不同的机制，无论是单独的还是共同的。微波预辐照某些塑料和抑制剂对其他样品的浮选都是有益的，它有助于塑料沉入浮选槽的底部。Design-Expert®软件建议的方程式，用于预测塑料浮选百分比与研究参数的关系，与实验结果相符。

图形摘要