The invention discloses a heavy
metal adsorbent and a preparation method thereof. The adsorbent comprises the following raw materials, by weight part, 27-35 parts of akamada, 13-21 parts of tert-butyl chloroacetate, 2-6 parts of isopropanol and 5-12 parts of saligenol. The preparation method comprises: mixing and
grinding akamada and isopropanol, adding a tert-butyl chloroacetate solution, performing ultrasonic treatment, adding saligenol drop by drop, and performing sealed heating and stirring, performing
microwave treatment, performing stirring till the obtained product is dried, and performing high temperature
calcination to obtain the heavy
metal adsorbent. The prepared adsorbent has super-high heavy
metal adsorption efficiency and can be repeatedly used for more than 100 times. The heavy metal adsorbent is large in adsorption capacity and high in adsorption speed. The preparation method is simple, heavy metal can be recycled through treatment of the used adsorbent with acid, and the used adsorbent can be recycled through high temperature
calcination at 450 DEG C, wherein the adsorbent can be frequently used.
Desorption can be completely carried out, so that the recycle cost of heave metal is low. The adsorbent for treating heavy metal
wastewater is low in treatment cost and simple in process, causes no secondary
pollution, and is suitable for industrial production.