Phytoremediation potential of Pistia stratiotes, Eichhornia crassipes, and Typha latifolia for chromium with stimulation of secondary metabolites oleh Zarrin Fatima Rizvi, Muqaddas Jamal, Haseena Parveen, Wajiha Sarfraz, Syeda Nasreen, Noreen Khalid, Khursheed Muzammil