Preparation method and application of scallop shell extract efficient adsorbent

A preparation method of a scallop shell extract efficient adsorbent, comprising the following steps:

• (1) rinsing scallop shells with water to remove impurities on surfaces of the scallop shells, and then naturally air-drying;
• (2) crushing air-dried scallop shells into small pieces, and heating in an oven to obtain heat-treated scallop shells (HSS);
• (3) putting the HSS into a thermostatic water bath oscillator to react with acetic acid at 150 revolutions per minute (rpm) and 25 degrees Celsius (° C.) for 24 hours (h), pouring out a residual solution (R1) of a reaction solution for storage, taking out remaining scallop shells (RSS1), rinsing three times with deionized water and drying;
• (4) reacting the RSS1 with acetic acid in the thermostatic water bath oscillator at 150 rpm and 25° C. for 24 h, decanting a residual solution (R2) for storage, taking out remaining scallop shells (RSS2), rinsing three times with deionized water and drying for later use;
• (5) reacting the RSS2 and acetic acid in the thermostatic water bath oscillator at 150 rpm and 25° C. for 24 h, taking out remaining scallop shells (RSS3), rinsing three times with deionized water and drying, pouring out a residual solution (R3) of a reaction solution for storage, and drying remaining precipitate (P3) to obtain the scallop shell extract efficient adsorbent, wherein a primary ingredient of the P3 is Ca2SiO4;
• (6) reacting the RSS3 with acetic acid in the thermostatic water bath oscillator at 150 rpm and 25° C. for 24 H to completely dissolve, and storing a residual solution (R4);
• (7) combining the R1, R2, R3 and R4 to prepare a calcium supplement, wherein a primary ingredient of each of the R1, R2, R3 and R4 is Ca(CH3COO)2, which is a calcium supplement.