Highly efficient and selective adsorption of heavy metal ions by hydrazide-modified sodium alginate

Tianzhu Shi; Zhengfeng Xie; Zhu Zhu; Wei Shi; Yucheng Liu; Minyao Liu

doi:10.1016/j.carbpol.2021.118797

Highly efficient and selective adsorption of heavy metal ions by hydrazide-modified sodium alginate

Carbohydr Polym. 2022 Jan 15:276:118797. doi: 10.1016/j.carbpol.2021.118797. Epub 2021 Oct 20.

Authors

Tianzhu Shi¹, Zhengfeng Xie², Zhu Zhu³, Wei Shi⁴, Yucheng Liu⁵, Minyao Liu⁴

Affiliations

¹ Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; Department of Brewing Engineering, Moutai Institute, Renhuai, Guizhou 564500, China.
² Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, China. Electronic address: xiezhf@swpu.edu.cn.
³ Inspection Department, Guizhou Provincial Institute for Quality Inspection and Testing of Liquor Products, Renhuai, Guizhou 564500, China.
⁴ Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China.
⁵ Oil & Gas Field Applied Chemistry Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China; Research Institute of Industrial Hazardous Waste Disposal and Resource Utilization, Southwest Petroleum University, Chengdu, Sichuan 610500, China.

PMID: 34823803
DOI: 10.1016/j.carbpol.2021.118797

Abstract

In the present study, a new potential adsorbent for the separation and removal of heavy metal ions was prepared using hydrazide modification. Characterization of structural and chemical properties of the absorbent indicated the dialdehyde sodium alginate (DSA) grafted adipic acid dihydrazide (AAD) plays a crucial role. The adsorption process correlated well with Freundlich isotherm and pseudo-second-order kinetics models. Additionally, the adsorption capacities for Hg²⁺, Pb²⁺, Cd²⁺, and Cu²⁺ were 7.833, 2.036, 4.766, and 3.937 mmol g^-1, respectively. The thermodynamic parameter for the sorption demonstrated the process is endothermic and spontaneous. FT-IR and XPS analysis revealed the combination of chelation interactions and ion exchange between nitrogen, oxygen atoms and heavy metal ions. Moreover, after 10 times adsorption-desorption recycles, the adsorption efficiency of the adsorbent was slightly decreased. In conclusion, the as-prepared adsorbent has great potential in practical water pollution purification.

Keywords: Adsorption; Heavy metal ions; Hydrazide–modified; Sodium alginate.