The current study's goal is to use a green synthesis approach in developing some biosorbents for lanthanum (La(III)) recovery from its aquatic media. Chitin (SW-Chitin) was extracted from industrial waste (shrimp waste, SW) by demineralization followed by deproteination reactions. The obtained chitin (SW-Chitin) product was converted to chitosan (SWC) by a deacetylation reaction. The purified chitosan product (PSWC) was modified with epichlorohydrin (ep) in two reaction steps to produce a chitosan-epichlorohydrin polymer (PSWCl/ep-Cl). The former product (chitosan-epichlorohydrin polymer, PSWC/ep-Cl) was modified with N,N'-bis(2-aminoethyl)ethane-1,2-diamine, and chloroacetic acid to produce a poly nitrogen biosorbent (PSWC/ep/T-amine) and poly oxygen/nitrogen biosorbent (SWCh/ep/T-amine/PCOOH), respectively. The complexing functionalities of the chitosan backbone have been improved by these moieties (multidentate nitrogen and oxygen donor moieties) to improve the loading capacity, selectivity, and kinetics. The SEM/EDX analysis show that PSWC/EP/T-amine, and PSWC/EP/T-amine/P-COOH mainly composed of nitrogen, and oxygen, hydrogen and carbon. The TGA analysis of PSWC/EP/T-amine, and PSWC/EP/T-amine/P-COOH revealed many periods of mass losses. Also, the dTG (%/min) of PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH biosorbents contain multiple endothermic peaks. All endothermic peaks in the dTG curves are related to thermal decomposition of PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH adsorbents. The affinity of SWCh/ep/T-amine and SWCh/ep/T-amine/PCOOH for lanthanum (III) ions was investigated using batch technique. The maximum uptake of lanthanum ions by SWCh/ep/T-amine and SWCh/ep/T-amine/PCOOH was achieved at pH 7 and 328K were 98.2 and 129.6 mg/g, respectively. The results refers to a chemisorption reaction of lanthanum ions with the PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH adsorbents controlled intraparticle diffusion mechanism. The isotherm and thermodynamic evaluation refers to spontaneous, endothermic, monolayer adsorption of lanthanum ions on the PSWC/EP/T-amine and PSWC/EP/T-amine/P-COOH adsorbents.