Preparation of modified sodium alginate aerogel and its application in removing lead and cadmium ions in wastewater

Zhuqing Wang; Shasha Wu; Yuenan Zhang; Lijing Miao; Yujie Zhang; Aiguo Wu

doi:10.1016/j.ijbiomac.2019.11.228

Preparation of modified sodium alginate aerogel and its application in removing lead and cadmium ions in wastewater

Int J Biol Macromol. 2020 Aug 15:157:687-694. doi: 10.1016/j.ijbiomac.2019.11.228. Epub 2019 Nov 30.

Authors

Zhuqing Wang¹, Shasha Wu², Yuenan Zhang³, Lijing Miao³, Yujie Zhang⁴, Aiguo Wu⁵

Affiliations

¹ Anhui Key Laboratory of Photoelectric-Magnetic Functional Materials, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing 246133, China.
² Anhui Key Laboratory of Photoelectric-Magnetic Functional Materials, Anhui Key Laboratory of Functional Coordination Compounds, Anqing Normal University, Anqing 246133, China; Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
³ Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.
⁴ Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. Electronic address: [email protected].
⁵ Cixi Institute of Biomedical Engineering, CAS Key Laboratory of Magnetic Materials and Devices & Key Laboratory of Additive Manufacturing Materials of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. Electronic address: [email protected].

PMID: 31790735
DOI: 10.1016/j.ijbiomac.2019.11.228

Abstract

A low-cost, environment-friendly sodium alginate-meso-2,3-dimercaptosuccinic acid hybrid aerogel (SA-DMSA) was synthesized by simple chemical grafting and vacuum freeze-drying method and used to remove heavy metal ions in wastewater. The as-prepared SA-DMSA showed high affinity for heavy metal ions, such as Pb²⁺, Cd²⁺, Cu²⁺, Cr³⁺, and Co²⁺, and can remove >90% of the metal ions from the corresponding solution. SA-DMSA also exhibited high selectivity to Pb²⁺ and Cd²⁺, and the maximum adsorption capacities for Pb²⁺ and Cd²⁺ reached 116.4 and 91.2 mg/g, respectively. The SA-DMSA adsorbent can be regenerated by a simple one-step acid washing, and the adsorption performance remained stable after repeated use. Given its low-cost and easy-to-obtain raw materials, simple preparation process, and simple regeneration process of the adsorbent, SA-DMSA has broad application prospects in the treatment of low-concentration heavy metal ions, especially for wastewater containing Pb²⁺ and Cd²⁺.

Keywords: Adsorption; Alginate aerogel; Lead ions.

MeSH terms

Alginates / chemistry*
Cadmium / chemistry*
Hydrogen-Ion Concentration
Ions / chemistry*
Metals, Heavy / chemistry
Molecular Structure
Regeneration
Spectroscopy, Fourier Transform Infrared
Temperature
Wastewater / chemistry*
X-Ray Diffraction

Substances

Alginates
Ions
Metals, Heavy
Waste Water
Cadmium