Biochar-algae microspheres based on sodium alginate for the highly efficient adsorption of malachite green dye: Kinetics, isotherms, and mechanism of adsorption

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology Pub Date : 2025-03-19 DOI:10.1016/j.jconhyd.2025.104547

Wei-Zhe Wu , Rui Li , Zhi-Qian-Li Ma , Chun-Xiao Liu , Wen-Ting Zhao

引用次数: 0

Abstract

In this study, biochar and Scenedesmus obliquus were coated with sodium alginate to prepare biochar-algal microspheres (BAM), and we investigated their adsorption properties on malachite green (MG). The results showed that 5.5 g of BAMs removed 98 % of 100 mg/L of MG after 120 h at 25 °C. In the isothermal adsorption experiment conducted at 25 °C, the adsorption capacity of BAMs for MG was 1.98 mg/g. Under these conditions, the adsorption capacity of BAMs was superior to that of biochar or algae microspheres alone, as well as their combined use. The BAMs not only addressed the issues of biochar recovery and secondary pollution, but also avoided the environmental sensitivity of algae, making BAMs a highly effective option for removing organic dyes.

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来源期刊

Journal of contaminant hydrology 环境科学-地球科学综合

CiteScore

6.80

自引率

2.80%

发文量

129

审稿时长

68 days

期刊介绍： The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide). The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.