An overview of microalgae for Cd2+ and Pb2+ biosorption from wastewater

被引：32
作者：
Nateras-Ramirez, O. [1 ]
Martinez-Macias, M. R. [2 ]
Sanchez-Machado, D. I. [1 ]
Lopez-Cervantes, J. [1 ]
Aguilar-Ruiz, R. J. [1 ]
机构：
[1] Inst Tecnol Sonora, Dept Biotecnol & Ciencias Alimentarias, Obregon 85100, Sonora, Mexico
[2] Inst Tecnol Sonora, Dept Ciencias Agua & Medio Ambiente, Obregon 85100, Sonora, Mexico
来源：
BIORESOURCE TECHNOLOGY REPORTS | 2022年 / 17卷
关键词：
Heavy metals; Bioremediation; Biomass; Biosorption mechanisms; HEAVY-METAL IONS; AQUEOUS-SOLUTION; SPIRULINA-PLATENSIS; ALGAL BIOMASS; CHLORELLA-VULGARIS; LEAD BIOSORPTION; POTENTIAL USE; GREEN-ALGAE; ADSORPTION; CADMIUM;
D O I：
10.1016/j.biteb.2021.100932
中图分类号：
Q81 [生物工程学（生物技术）]; Q93 [微生物学];
学科分类号：
071005 ; 0836 ; 090102 ; 100705 ;
摘要：
Lead (Pb2+) and cadmium (Cd2+) are the most toxic heavy metals that have been discharged into the environment. There is interest in new adsorbents capable of removing heavy metals. This review focuses on the use of microalgae as an alternative for removing Pb2+ and Cd2+. It was found that microalgae biomass has a higher affinity for the biosorption of Pb2+. The ion exchange was a main mechanism of adsorption. The optimal pH to remove these metals was not clear, but values between 4.0 and 7.0 were the most implemented. The thermodynamics equilibrium was affected by microalgae species, heavy metal affinity, cell surface form, ionic medium complexity, and other factors. Langmuir isotherm model describe the Pb2+ and Cd2+ adsorption. Finally, carboxyl group was the most important in adsorption Pb2+ and Cd2+ heavy metals.
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页数：13
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