Introduction -- Synthesis of nanoparticles and one-dimensional nanomaterials -- Nanotechnostructured catalysts TiO₂ nanoparticles for water purification -- Nanoparticles for treatment of chlorinated organic contaminants -- Nanoparticles for treatment of arsenic -- Nanoparticles as sorbents for removal of heavy metal ions from aqueous solutions -- Bimetallic nanoparticles -- Challenges in groundwater remediation with iron nanoparticles: enabling colloidal stability -- Iron-based magnetic nanoparticles for removal of heavy metals from electroplating and metal-finishing wastewater -- Nanoscale carbon materials for contaminant separation -- Nanoscale porous materials for water treatment: advances and challenges -- Nanomembranes -- Nanosensors -- Nanomaterials for environmental burden reduction, waste treatment, and non-point source pollution control -- Fate and transport of nanomaterials in aquatic environments -- Engineered nanomaterials as emerging contaminants in water -- Environmental risks of nanomaterials.