Soil chemistry; Nanoparticles (NPs); Copper sulfide nanocrystals; Cadmium sulfide nanocrystals; CuS; CdS; Metal sulfide nanoparticles; SCHWERMETALLE (UMWELTSCHADSTOFFE); AUENBÖDEN + ALLUVIALE BÖDEN + SCHWEMMLAND-BÖDEN (PEDOLOGIE); Flooded soils; HEAVY METALS (ENVIRONMENTAL POLLUTANTS); BIOCHEMISCHE REDOXREAKTIONEN; Biogeochemistry; BIOGEOCHEMICAL CYCLE (BIOGEOCHEMISTRY); redox chemistry; MOBILITÄT UND VERFÜGBARKEIT VON BODENINHALTSSTOFFEN (BODENCHEMIE); MOBILITY AND AVAILABILITY OF SOIL COMPONENTS (SOIL CHEMISTRY); mobility of nanoparticles; Hexagonal nanocrystals; MIKROPARTIKEL + NANOPARTIKEL + MIKROSPHÄREN + NANOSPHÄREN (NANOTECHNOLOGIE); Transmission electron microscopy (TEM); Dynamic light scattering; EXAFS SPECTROSCOPY - EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY; EXAFS-SPEKTROSKOPIE - EXTENDED X-RAY ABSORPTION FINE STRUCTURE SPECTROSCOPY; Column experiment; Säulenexperimente; Natural organic matter (NOM); nanoparticle growth; COLLOIDS AND DISPERSE SYSTEMS (COLLOID CHEMISTRY); Colloidal stability; KOLLOIDE UND DISPERSE SYSTEME (KOLLOIDCHEMIE); KOLLOIDCHEMIE; oxidative dissolution of metal sulfides; Oxidative Auflösung von Metallsulfiden; Deposition of nanoparticles