Removal of most frequent microplastic types and sizes in secondary effluent using Al2(SO4)3: choosing variables by a fuzzy Delphi method

Experts’ opinion in fuzzy Delphi

From the 35 experts sent questionnaires, 22 of them expressed a desire and willingness to participate in the research; their characteristics are presented in Table S2-3. The results and analyses related to the fuzzy Delphi method are given in supplementary file 1, and Table S2-4 shows the final Fuzzy and De-Fuzzy values related to each question.

Choosing the variables of the process

As mentioned in a previous section, the systematic review revealed that the significant variables for the coagulation removal of MPs included MPs concentration and…