Preparation method of composite heavy metal adsorbent with hydroxyapatite-modified Phyllostachys pubescens structure

The invention discloses a preparation method of a composite heavy metal adsorbent with a hydroxyapatite-modified Phyllostachys pubescens structure. The preparation method comprises the steps of: cutting Phyllostachys pubescens into pieces, performing drying, removing a surface layer and bamboo joints with a dense structure, adding dilute ammonia water for digestion, performing extraction, performing rinsing with ultrapure water until the extracted Phyllostachys pubescens pieces are clean, performing drying, preparing a phosphoric acid solution and calcium hydroxide solution by using a sodium lauryl sulfate solution instead of pure water, performing circular soaking on the obtained Phyllostachys pubescens pieces in the two solutions, and then conducting drying in an oven; and finally putting the dried Phyllostachys pubescens pieces in a muffle furnace for calcination at 600 DEG C for 4 hours, taking the calcined product out, and performing grinding and sieving so as to obtain the composite heavy metal adsorben