Additional file 1: of The Role of Nanomaterials and Nanotechnologies in Wastewater Treatment: a Bibliometric Analysis

Figure S1. The geographical distribution of institutions. Figure S2. The number of publications of the top five productive institutions during 1997–2016. TP: the total number of publications. Figure S3. The number of articles of the top six productive subject categories. Figure S4. The number of articles of the top five productive journals during 1998–2013. (DOCX 93742 kb)