Related Experiment Video
Updated: Feb 10, 2026
07:27
Author Spotlight: On-Site Biochar Production for Woody Debris Incineration in Forestry
Published on: January 5, 2024
4.0K
La(OH)3-modified magnetic pineapple biochar as novel adsorbents for efficient phosphate removal
Taiwan Liao1, Ting Li1, Xiangde Su1
1Department of Chemistry, Jinan University, Guangzhou 510632, PR China.
Bioresource Technology
|May 11, 2018
Summary
Newly developed lanthanum(III) hydroxide-modified magnetic pineapple biochar (La(OH)3-MC) effectively removes phosphate. La10-MC shows high adsorption capacity and stability for water remediation.
Area of Science:
- Environmental Science
- Materials Science
- Chemistry
Background:
- Phosphate pollution poses a significant threat to aquatic ecosystems.
- Developing efficient and recyclable adsorbents is crucial for phosphate removal.
- Pineapple biochar offers a sustainable precursor for adsorbent development.
Purpose of the Study:
- To synthesize and characterize lanthanum(III) hydroxide-modified magnetic pineapple biochar (La(OH)3-MC) for phosphate adsorption.
- To investigate the adsorption capacity, selectivity, and stability of the developed adsorbent.
- To elucidate the adsorption mechanism of phosphate onto La(OH)3-MC.
Main Methods:
- Preparation of La(OH)3-MC with varying La(OH)3 content.
- Phosphate adsorption experiments.
- Adsorption isotherm and kinetic studies (Langmuir and pseudo-second-order models).
- Selectivity tests with coexisting ions.
- Adsorption-desorption cycle tests.
- Leaching studies for heavy metal ions.
- Mechanism analysis using various characterization techniques.
Main Results:
- La10-MC exhibited excellent magnetic properties for easy recovery and a high phosphate adsorption capacity of 101.16 mg P/g.
- Adsorption followed the Langmuir model and pseudo-second-order kinetics.
- High removal efficiency (>96.04%) was observed in the presence of coexisting ions, indicating high phosphate selectivity.
- The adsorbent demonstrated excellent stability and cyclic utilization with minimal performance decrease after three cycles.
- Leaching studies confirmed negligible La3+ and Fe3+ leakage.
Conclusions:
- La(OH)3-modified magnetic pineapple biochar is a highly efficient, selective, and stable adsorbent for phosphate removal.
- The adsorption mechanism involves a combination of precipitation, electrostatic interaction, ligand exchange, and inner-sphere complexation.
- This novel material shows great promise for practical applications in wastewater treatment and environmental remediation.
Related Concept Videos
01:22Phosphate Buffer
5.4K
The phosphate buffer system is a critical biological mechanism for maintaining pH stability in the body. This system operates primarily through two components: sodium dihydrogen phosphate (NaH2PO4), which acts as a weak acid, and sodium hydrogen phosphate (Na2HPO4), which serves as a weak base.
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...
Sodium dihydrogen phosphate does not fully dissociate in neutral or acidic solutions. When a strong base, such as sodium hydroxide (NaOH), is introduced into the solution, sodium dihydrogen phosphate...
5.4K
01:27Roles of Electrolytes: Calcium and Phosphate
1.3K
Calcium and phosphate are essential electrolytes in the human body, with calcium being the most abundant mineral. Around 99% of the body's calcium is stored in the skeleton and teeth, forming a crystal lattice of mineral salts in combination with phosphates. Calcium plays crucial roles in various bodily functions such as blood clotting, neurotransmitter release, muscle tone maintenance, and nervous and muscle tissue excitability.
The calcium concentration in blood plasma is primarily...
The calcium concentration in blood plasma is primarily...
1.3K
01:20Drugs Affecting GI Tract Motility: Adsorbents as Antidiarrheal Agents
643
Diarrhea is characterized by the occurrence of frequent, watery bowel movements. Various factors can trigger diarrhea, including viral or bacterial infections, foodborne illnesses, side effects from certain medications, and underlying digestive disorders. If not adequately managed, diarrhea can lead to complications such as dehydration, electrolyte imbalances, and nutrient deficiencies. Severe diarrhea can lead to significant weight loss, malnutrition, and weakened immune function.
Adsorbents...
Adsorbents...
643
03:02Colors and Magnetism
14.2K
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
14.2K
01:11ortho–para-Directing Activators: –CH3, –OH, –NH2, –OCH3
7.5K
All ortho–para directors, excluding halogens, are activating groups. These groups donate electrons to the ring, making the ring carbons electron-rich. Consequently, the reactivity of the aromatic ring towards electrophilic substitution increases. For instance, the nitration of anisole is about 10,000 times faster than the nitration of benzene. The electron-donating effect of the methoxy group in anisole activates the ortho and para positions on the ring and stabilizes the corresponding...
7.5K
00:57Modified Boxplots
11.3K
A standard box and whisker plot informs us about the spread of the data in a given sample. One can identify the minimum value, maximum value, first quartile value, second quartile or median value, and third quartile.
However, the box plot does not tell the reader about outliers - values that lie far from the center of the data. We can modify the standard box and whisker plot to identify the outliers and visualize the actual spread of the data in a sample.
Initially, we calculate the adjusted...
However, the box plot does not tell the reader about outliers - values that lie far from the center of the data. We can modify the standard box and whisker plot to identify the outliers and visualize the actual spread of the data in a sample.
Initially, we calculate the adjusted...
11.3K