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