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| Preliminary study on removal of cadmium in aqueous solutionby shrimp shell activated by phosphate buffer |
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| DOI：10.16768/j.issn.1004-874X.2016.12.021 |
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| Abstract: |
| Adhesion protein in shrimp shell is found with relatively higher content of acidic amino acid
residues，which is conducive to remove heavy metals in the aqueous solution for shrimp shells through cation
exchange. Decalcified shrimp shell and activated by phosphate buffer can produce a kind of shrimp shell material that
can remove cadmium ion from dilute aqueous solution. Taking Cd2+ removal rate as index，single-factor test combined
with orthogonal test were used to optimize the shrimp shell activation condition. The optimum conditions were obtained
as follows: phosphate buffer pH of 7.5，concentration of 0.15 mol/L，ratio of liquid to solid of 20∶1，activation time
of 120 min. And the Cd2+ removal rate was 95.25（ ±0.57）% when the phosphate buffer activation shrimp shell
dosage was 100 mg/80 mL in Cd2+ aqueous solution. |
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