Exploring Modified Rice Straw Biochar as a Sustainable Solution for Simultaneous Cr(VI) and Pb(II) Removal from Wastewater: Characterization, Mechanism Insights, and Application Fe... oleh Yogeshwaran Venkatraman, Priya Arunkumar, Nadavala Siva Kumar, Ahmed I. Osman, Muruganandam Muthiah, Ahmed S. Al-Fatesh, Janardhan Reddy Koduru