Efficiencies and mechanism of crustacean biomasses on removing cadmium in acid mine drainage
Using low-cost and sustainable remediation materials to treat acid mine drainage(AMD)has important scientific research values and application potentials.In this study,four crustacean biomasses including Metapenaeus ensis,prawn,talon shrimp and swimming crab shells were selected to explore the performance and mechanism of cadmium removal in simulated AMD samples with and without constant pH.It was concluded that crustacean biomasses have excellent cadmium removal capabilities ranging from 112.38 to 235.45 mg·g-1.Their abundant calcium carbonate played a crucial role in the cadmium removal,in which not only the pH values of AMD were increased by neutralization with reduced cadmium mobilization,but also the cadmium was stabilized by forming cadmium carbonate precipitates.In addition,a large number of hydroxyl,carboxyl and other functional groups in crustacean biomasses can also capture cadmium ions through the complexation.These findings provide theoretical basis in promoting the resource utilization of crustacean biomasses and the low-cost and sustainable remediation of AMD from abandoned mines.
国家科技期刊平台
NSTL
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