Amylopectin Regulated Mineralization of Calcium Carbonate and Its Application in Removing of Pb(II)

Abstract

As an ecological and environment-friendly building material, sticky rice mortar has attracted the attention of many researchers. Amylopectin is the most important organic matter of it, which can improve the mechanical properties and durability of sticky rice mortar by inducing mineralization of calcium carbonate ( CaCO3 ). However, amylopectin induced formation of CaCO 3 has not been reported. In this paper, mineralization of CaCO 3 induced by gelatinized amylopectin is investigated. For comparison, the different morphologies of CaCO 3 are studied in the presence of Mg 2+ , Fe 3+ . Moreover, these CaCO 3 products with different morphologies are used to clean the waste water. The results indicate that gelatinized amylopectin is conducive to formation of pumpkin-like vaterite. It forms uniform rod and dumbbell-shaped calcite in the presence of Mg 2+ , form calcite with stepped depressions in the presence of Fe 3+ . The adsorption of Pb(II) can reach extremely high level (1445.86 mg g −1 ) with the rod-like calcite.

A review of nacre-inspired materials: Chemistry, strengthening-deformation mechanism, synthesis, and applications

“…24 b). In the field of water treatment, gelatinized amylopectin-induced mineralization of CaCO3 was performed, and the produced CaCO 3 , when used for water purification Pb(II) adsorption, was found to be extremely high [284]. CaCO 3 can as such, be used for heavy metal adsorption from water; however, natural calcite has a very low heavymetal adsorption efficiency.…”

Experimental Study on the Effect of an Organic Matrix on Improving the Strength of Tailings Strengthened by MICP

“…The following research discovered that dextran could effectively induce leaf-like aragonite crystals when used as a template [27]. Zhao et al [28] studied calcium carbonate induced by amylopectin, Mg 2+ , and Fe 3+ . The results showed that amylopectin was instrumental in forming pumpkin-like calcite, while rod-like and dumbbell-like calcite were formed in the presence of Mg 2+ , and calcite with step depression was formed in Fe 3+ .…”