Self-assembly biochar colloids mycelial pellet for heavy metal removal from aqueous solution
| Autor: | Yujiao Wang, Fang Ma, Ting Xiao, Li Wang, Shanshan Bai, Shishu Zhu, Tianmiao Yu |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis 0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Wastewater 01 natural sciences Water Purification Industrial wastewater treatment Metal symbols.namesake Adsorption Metals Heavy Biochar Environmental Chemistry Biomass Colloids 0105 earth and related environmental sciences Cadmium Aqueous solution Chemistry Public Health Environmental and Occupational Health Langmuir adsorption model Sorption General Medicine General Chemistry Pollution 020801 environmental engineering Kinetics Chemical engineering visual_art Charcoal visual_art.visual_art_medium symbols Water Pollutants Chemical |
| Zdroj: | Chemosphere. 242 |
| ISSN: | 1879-1298 |
| Popis: | To effectively improve the heavy metal removal efficiency and stability of biomass adsorbents, a novel biochar colloids-mycelial pellets (BC-MP) composite was prepared via a biological assembly method. BC-MP was successfully produced with increased surface area and multisorption sites by physical adsorption, electrostatic interaction and hydrogen-bond formation between BC and extracellular polymers on MP. To investigate the performance and mechanisms of heavy metal adsorption by BC-MP, batch experiments were conducted with cadmium (Cd (II)) as the model pollutant. Results showed that BC-MP had higher removal efficiency (57.66%) compared to BC (5.45%) and MP (38.45%), respectively, due to the synergistic effect. The maximum adsorption capacity of Cd (II) on BC-MP was 102.04 mg/g based on Langmuir isotherm model. Adsorption kinetics analysis indicated that chemical sorption was the key factor controlling the adsorption of Cd (II) onto BC-MP. Multiple characterization tests revealed that the main mechanisms of the adsorption process were surface complexation, cation exchange and precipitation. The BC-MP composite showed excellent heavy metal removal efficiency with long-term adsorption stability, suggesting its potential as a promising biosorbent for heavy metal removal from industrial wastewater. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect