highly significantp < 0.01
A two-sided t -test revealed significant ( p < 0.05) and highly significant ( p < 0.01) differences in maximum adsorption capacity for REEs, especially for Nostoc sp. 20.02. 3.3 Maximum adsorption capacity of EPS, biomass after EPS extraction, and untreated biomass for REEs Extracted EPS of all three tested cyanobacteria displayed high adsorption capacities for REEs ( Figure 4 ).