Technology: general issues 2 adsorption 2 anionic dye water treatment 2 Environmental science, engineering & technology 1 Hg2+ 1 History of engineering & technology 1 K-type zeolite 1 Pb2+ removal 1 activated carbon 1 adsorption characteristics 1 adsorption mechanism 1 advanced oxidation treatments 1 aggregate 1 agrowaste biomass 1 algae 1 algal bloom 1 alkaline activation 1 alkali–silicate reaction 1 arsenic ion 1 bacteria 1 banana peel 1 bioblends 1 biochar 1 biosorbent 1 biosorption 1 bisphenol A 1 cadmium 1 cadmium pollution 1 carbon nanotubes 1