Animal manure, Trace metal 1 Arsenic concentration 1 Biogeochemistry 1 Biomass plants 1 Biosensors for toxic trace 1 Biosolids 1 Boron 1 Electroremediation of heavy metals 1 Fluoride contamination 1 Fly ash 1 Geochemical processes Heavy metals availability 1 Inorganic elements 1 Lead accumulation 1 Metal tolerant plants 1 Phytoextraction 1 Phytoremediation 1 Phytoremediation technologies 1 Trace elements in environment 1 Trace elements, Human health effects 1