Phosphate removal from water through green, highly efficient technologies has received much attention. Biochar is an effective adsorbent for phosphate removal. However, adsorption capacity of phosphate on pristine rice straw-based biochar was not optimistic due to low anion exchange capacity. In this study, Fe-modified, Mg-modified and MgFe-modified rice straw-based biochar (Fe-BC, Mg-BC and MgFe-BC) were prepared by combining metal impregnation and biological template methods to improve the adsorption capacity of phosphate. The surface characteristics of biochar and the adsorption behavior of phosphate on biochar were investigated. The modified biochar had the specific surface area of 17.910-39.336 m/g, and their surfaces were rich in a large number of functional groups and metal oxides. Phosphate release was observed on pristine rice straw-based biochar without metal impregnation. The maximum adsorption capacities of phosphate on MgFe-BC, Mg-BC and Fe-BC at 298 K were 6.93, 5.75 and 0.23 mg/g, respectively. Adsorption was a spontaneous endothermic process, while chemical adsorption dominated and electrostatic attraction and pores filling existed simultaneously. Based on the site energy distribution theory study, the standard deviation of MgFe-BC decreased from 6.96 to 4.64 kJ/mol with temperature increasing, which proved that the higher the temperature would cause the lower heterogeneity. Moreover, the effects of pH, humic acid, co-existing ions and ionic strength on phosphate adsorption of MgFe-BC were also discussed. MgFe-BC with fine pores and efficient adsorption sites is an ideal adsorbent for phosphate removal from water.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s11356-024-33795-9 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Enhanced removal of sulfonamide antibiotics in water using high-performance S-nZVI/BC derived from rice straw.
J Environ Manage
January 2025
Key Laboratory of Jiangxi Province for Functional Biology and Pollution Control in Red Soil Regions, School of Life Science, Jinggangshan University, Ji'an, 343009, China. Electronic address:
Sulfonamide antibiotics (SAs) are widely used in the biomedical field but pose an environmental risk as ecotoxic pollutants. Developing eco-friendly methods to degrade SAs into harmless compounds is crucial. In this work, biochar (BC) was prepared from rice straw via pyrolysis and used to support S-nZVI, thereby forming the S-nZVI/BC composites.
View Article and Find Full Text PDFEnhancing feed fermentation in rice straw basal diets using leaf protein concentrate as a novel ruminant supplement derived from .
Vet World
September 2024
Research Center for Horticulture, Research Organization for Agriculture and Food, National Research and Innovation Agency, Indonesia.
Article Synopsis
- The study investigates the potential of using rice straw, along with protein extracted from leaves, as livestock feed to improve nutrition and digestibility.
- Distilled water was found to be more effective than chemical solvents like 0.1 N NaOH for extracting protein from leaves, yielding higher protein and amino acid content.
- Incorporating this distilled water-extracted protein into low-quality rice straw diets resulted in better fermentation and digestibility, suggesting a viable method to enhance livestock nutrition.
Effects of dietary black cumin ( L.) meal on performance, blood metabolites, and digestibility in a rice straw-based diet of fattening Garut lambs.
Vet World
September 2024
Department of Animal Production, Faculty of Animal Husbandry, Universitas Padjadjaran, Sumedang, 45363, Indonesia.
Background And Aim: During black cumin oil production, black cumin meal (BCM) is produced as a by-product. This study investigated the potential use of BCM to partly replace concentrate in a rice straw-based diet of fattening Garut lambs.
Materials And Methods: Twenty-eight heads of male Garut lambs aged approximately10 months with an average initial body weight of 20.
A sustainable black liquor-based carbon scavenger to promote urea formaldehyde as green wood adhesive with low formaldehyde emission.
Int J Biol Macromol
December 2024
Cellulose and Paper Department, National Research Centre, Dokki-12622, Giza, Egypt. Electronic address:
The current study focuses on finding an ecological method to dispose of black liquors (BLs), containing lignin macromolecules, which are produced as byproducts of rice straw-based paper production. In addition to maximizing their value as precursors in the preparation of novel formaldehyde scavengers to avoid the environmental risks associated with using urea formaldehyde in agro-wood composites. To optimize the route, various black liquors are prepared from pulping of rice straw by different pulping agents (alkali, neutral, acidic and kraft reagents) used as additions or precursors for carbon compounds.
View Article and Find Full Text PDFEnhanced adsorption of phosphate by rice straw-based biochar prepared via metal impregnation and bio-template technology.
Environ Sci Pollut Res Int
June 2024
Bureau of Ecology and Environment of Zizhong, Neijiang, 641215, People's Republic of China.
Phosphate removal from water through green, highly efficient technologies has received much attention. Biochar is an effective adsorbent for phosphate removal. However, adsorption capacity of phosphate on pristine rice straw-based biochar was not optimistic due to low anion exchange capacity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!