Two variants of the sword bean (Canavalia gladiata), namely the white sword bean (WSB) and the red sword bean (RSB), are known. The MgCl concentration-dependent canavalin solubility showed different behavior among the extracts from distinct beans prepared by distinct pretreatments. Pretreatment and bean selection are important factors for use in food chemical and biochemical experiments.
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Effects of enzyme-induced carbonate precipitation (EICP) with different urease sources on the zinc remediation.
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Hebei University, No. 180 Wusi Dong Road, Lian Chi District, Baoding, Hebei, China. Electronic address:
Enzyme-induced carbonate precipitation (EICP) has been studied in the remediation of heavy metals in recent years. This study aims to investigate the impact of EICP with jack bean urease (JU) and sword bean urease (SU) on the Zn remediation. The results show that relatively high concentration of organic molecules in SU can protect urease from deactivation and absorb Zn.
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Article Synopsis
- Enzyme-induced carbonate precipitation (EICP) is being explored for cleaning up heavy metal contamination in soil and water, focusing on the roles of Zn, Ni, and Cr(VI) in contaminated sand using urease from sword beans.
- The study found that increased calcium levels improved heavy metal immobilization percentages, achieving impressive results after several treatment cycles: nearly complete immobilization of Zn and significant percentages for Ni and Cr(VI).
- Analytical methods revealed the formation of carbonate precipitates and metallic oxides during the process, supporting the idea that EICP works through biomineralization, adsorption, and complexation, while simultaneously increasing the strength of the treated sand.
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