A method was developed that used sodium alginate-polyvinyl alcohol(PVA) to fix Sargassum thunbergii derived material and activated carbon together with the aim of studying the product's biological adsorption capacity for the heavy metal Zn~(2+) in wastewater.The results showed that when the contents of the immobilized material contained 15 g·L~(-1)Sargassum powder,2% sodium alginate solution,6% PVA solution,and 1.5%activated carbon,the adsorption of immobilized beads to Zn~(2+) in wastewater was at the maxi...