Chromium as a severe anthropogenic geochemical anomaly in river sediments near a tannery outfall: spatial attenuation, source apportionment and ecological risk screening - Rahat Khan; Shuvashish Das Shuvo; Md. Samium Basir; Md. Abu Bakar Siddique; Javed Mallick; Hoang Thi Hang; Md. Harunor Rashid Khan; Saad Aldawood; Dhiman Kumer Roy; Narottam Saha (Environmental Geochemistry and Health, 2026)