Enhancing cadmium bioremediation by a complex of water-hyacinth derived pellets immobilized with Chlorella sp

Ying Shen; Wenzhe Zhu; Huan Li; Shih-Hsin Ho; Jianfeng Chen; Youping Xie; Xinguo Shi

doi:10.1016/j.biortech.2018.02.060

Enhancing cadmium bioremediation by a complex of water-hyacinth derived pellets immobilized with Chlorella sp

Bioresour Technol. 2018 Jun:257:157-163. doi: 10.1016/j.biortech.2018.02.060. Epub 2018 Feb 15.

Authors

Ying Shen¹, Wenzhe Zhu², Huan Li², Shih-Hsin Ho³, Jianfeng Chen⁴, Youping Xie⁴, Xinguo Shi⁵

Affiliations

¹ College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China; Fujian Engineering Research Center for Comprehensive Utilization of Marine Products Waste, Fuzhou University, Fujian 350116, China.
² College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou 350116, China.
³ Fujian Engineering Research Center for Comprehensive Utilization of Marine Products Waste, Fuzhou University, Fujian 350116, China.
⁴ Fujian Engineering Research Center for Comprehensive Utilization of Marine Products Waste, Fuzhou University, Fujian 350116, China; Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fujian 350116, China.
⁵ Fujian Engineering Research Center for Comprehensive Utilization of Marine Products Waste, Fuzhou University, Fujian 350116, China; Fujian Key Laboratory of Marine Enzyme Engineering, Fuzhou University, Fujian 350116, China. Electronic address: xshi@fzu.edu.cn.

PMID: 29499497
DOI: 10.1016/j.biortech.2018.02.060

Abstract

A complex of water-hyacinth derived pellets immobilized with Chlorella sp. was applied, for the first time, in the bioremediation of Cadmium (Cd). The Cd(II) removal efficiency of the complex was optimized by investigating several parameters, including the pellet materials, algal culture age, and light intensity. Results showed that the Cd(II) removal efficiency was positively related to the algal immobilization efficiency and the algal bioaccumulation capacity. Since higher surface hydrophilicity leads to higher immobilization efficiency, the water-hyacinth leaf biochar pellet (WLBp) was selected as the optimal carrier. A maximum Cd(II) removal efficiency of 92.45% was obtained by the complex of WLBp immobilized with algal cells in stationary growth phase and illuminated with a light intensity of 119 μmol m^-2 s^-1. Recovery tests on both microalgal cells and the WLBp demonstrated that the algal cells and the biochar pellet can be economically recycled and reused.

Keywords: Biochar; Biosorption; Cadmium; Chlorella sp.; Immobilized.

MeSH terms

Adsorption
Biodegradation, Environmental*
Cadmium*
Chlorella
Eichhornia*
Hyacinthus

Substances

Cadmium