scientific diagram, academic style, left to right layout. left: wastewater containing nh4+, no3-, and rare earth elements. middle: rees inhibiting two bacteria. top bacteria (pn) shrinking. bottom bacteria (anaob) showing cell wall damage, displacement of calcium ions by rees, and internal reactive oxygen species (ros) explosions. right: an unbalanced scale showing nitrite (no2-) supply vs consumption, leading to system collapse. clean white background, vector art style, high resolution, microbiology concepts.