Reduction of Hexavalent Chromium Using L-Cysteine Capped Nickel Nanocatalysts (Nazar Hussain Kalwar, Sirajuddin, Syed Tufail Hussain Sherazi, Abdul Rauf Khaskheli, Razium Ali Soomro, & Afzal Shah , Trans.). (2025). Pakistan Journal of Analytical & Environmental Chemistry, 14(1), 54 – 60. https://doi.org/10.21743/