Green alga article 8 Algae 6 Chlorophyta 6 Copper 6 copper 6 green alga 6 zinc 6 Adsorption 4 Argentina 4 Biomass 4 Biosorbents 4 Biosorption 4 Cadmium 4 Freundlich models 4 Hydrogen-Ion Concentration 4 Langmuir models 4 Langmuirs 4 Metals, Heavy 4 Toxicity 4 Ulva 4 Ulva lactuca 4 Zinc 4 adsorption 4 algae 4 biosorption 4 cadmium 4 cell wall 4 controlled study 4 heavy metal 4