The effects of modification agents, pH value, adsorption time, adsorbent dosage, solution initial concentration and temperature on biosorption capacity were investigated with static experiments, and the adsorption process was analyzed in thermodynamics and kinetics. The results showed that the adsorption rate of uranium (VI) on wheat straw increased about 52% after modifying by NaOH. At 303 K and pH 3.0, the saturated adsorption Qmax was up to 1.20 mg/g for approximately 120 min. The equilibrium data fit well with the Freundlich isotherm, and the adsorption reaction was endothermic and spontan...