Preparation method of surface modified pine needle loaded lanthanum hydroxide phosphorus adsorbent

The invention discloses a preparation method of surface modified pine needle loaded lanthanum hydroxide phosphorus adsorbent. Surface modified pine needles serve as the carrying material, and surfaces of the pine needles are loaded with lanthanum hydroxide through the chemical deposit effect. According to the main preparation process, smashed pine needle cuticle is broken and organic substances in pine needle tissue structures are extracted through an alkali-alcohol mixed solution, and therefore the surfaces of pine needle tissue are loaded with lanthanum hydroxide through deposition. The phosphorus adsorbent is stable in phosphorus removal effect, convenient to recover and little in organic substance dissolution in the adsorption process; meanwhile, forestry by-products are utilized as resources, and quite good application prospects and environment benefits are achieved.