Assessment of plant growth performance and nutrient release for application of phosphorus-loaded layered double hydroxides as fertilizer

The objective of this study was to verify the feasibility of using biochar, functionalized with layered double hydroxides, as a fertilizer after its use in phosphate treatment (P-BC-LDHs). It was conducted with several levels of P-BC-LDHs using seed germination and early growth assays of lettuce (Lactuca sativa L.). The application of P-BC-LDHs resulted in successful seedling emergence, with an excellent germination capacity of over 96% for all treatments. However, compared to the controls, P-BC-LDHs did not provide favorable seedling traits. In contrast, in the latter experiments, lettuce cultivated under mixtures with P-BC-LDHs, particularly at an application rate of 2.5% (w/w), displayed superior growth quality to those under non-treated conditions. The length of lettuce shoots and roots from this optimal dosage were increased by at least 24% compared to untreated samples. A 17% reduction in biomass yield was observed for the samples from non-supplemented substrates. The nutrient release profiles showed that P-BC-LDHs were capable of slowly supplying phosphorus, thereby increasing the long-term nutrient availability for plants. The findings reported here provide important insights into these materials and confirm that P-BC-LDHs can be used for agricultural purposes after phosphate remediation applications. The results of this study provide constructive information to facilitate the implementation of biochar-based LDH composites for sustainable phosphate removal and recovery.

Download Full-text

Layered double hydroxides: matrices for storage and source of boron for plant growth

Clay Minerals ◽

10.1180/clm.2018.6 ◽

2018 ◽

Vol 53 (1) ◽

pp. 79-89 ◽

Cited By ~ 5

Author(s):

Gustavo Franco de Castro ◽

Jader Alves Ferreira ◽

Denise Eulálio ◽

Silas Junior de Souza ◽

Sarah Vieira Novais ◽

...

Keyword(s):

Plant Growth ◽

Layered Double Hydroxides ◽

Dry Matter ◽

Statistical Difference ◽

Crop Productivity ◽

Absorption Efficiency ◽

Basal Spacing ◽

Plant Yield ◽

Constant Ph ◽

Double Hydroxides

ABSTRACTThe increase of the absorption efficiency of boron (B) by plants is essential for increasing crop productivity. The intercalation of B in MgAl layered double hydroxides (LDHs) is an alternative to evaluating how these materials can provide B to plants. In this work, a MgAl LDH intercalated with borate ions (Mg2Al-B-LDH) was synthesized by the constant pH coprecipitation method, and the material produced was evaluated as a matrix for storage and as a source of B for plants. The Mg2Al-B-LDH was characterized by XRD, ATR-FTIR, TGA-DTA, specific surface area, pore size and volume, and SEM. A bioassay was performed to verify the supply of B to plants from the two sources in the forms of H3BO3 and of Mg2Al-B-LDH to sunflower plants grown in pots. The LDH basal spacing value of 12.0 Å is characteristic of intercalation of tetraborate octahydrate ions [B4O5(OH)42−]·8H2O between the layers. There was an increase in the dry matter (DM) and B content of the plants relative to those treatments where no B was added. The lack of statistical difference for plant yield between the two sources of B suggests a lack of stability of the Mg2Al-B-LDH structure under the acidic condition of the soil.

Download Full-text

Bioavailability of Zn from layered double hydroxides: The effects of plant growth-promoting rhizobacteria (PGPR)

Applied Clay Science ◽

10.1016/j.clay.2019.105283 ◽

2019 ◽

Vol 182 ◽

pp. 105283 ◽

Cited By ~ 2

Author(s):

Mahshid Shafigh ◽

Mohsen Hamidpour ◽

Payman Abbaszadeh-Dahaji ◽

Vahid Mozafari ◽

Gerhard Furrer

Keyword(s):

Plant Growth ◽

Layered Double Hydroxides ◽

Plant Growth Promoting Rhizobacteria ◽

Plant Growth Promoting ◽

Growth Promoting ◽

Double Hydroxides

Download Full-text

EFFICIENT REMOVAL OF ANIONIC DYE POLLUTANT BY NIMGAL LAYERED DOUBLE HYDROXIDES OF VARIABLE COMPOSITION

Catalysis in Green Chemistry and Engineering ◽

10.1615/catalgreenchemeng.2018028634 ◽

2018 ◽

Vol 1 (4) ◽

pp. 307-323

Author(s):

Dipshikha Bharali ◽

Pankaj Bharali ◽

Ramesh Ch. Deka

Keyword(s):

Layered Double Hydroxides ◽

Variable Composition ◽

Efficient Removal ◽

Anionic Dye ◽

Double Hydroxides

Download Full-text

Acceptorless amine dehydrogenation and transamination using Pd-doped layered double hydroxides

10.26434/chemrxiv.6998204.v2 ◽

2018 ◽

Author(s):

Diana Ainembabazi ◽

Nan An ◽

Jinesh Manayil ◽

Kare Wilson ◽

Adam Lee ◽

...

Keyword(s):

Layered Double Hydroxides ◽

Oxidation States ◽

Secondary Amines ◽

Primary Amines ◽

Acid Dissolution ◽

Oxidative Amination ◽

Strong Function ◽

Excellent Activity ◽

High Yields ◽

Double Hydroxides

<div> <p>The synthesis, characterization, and activity of Pd-doped layered double hydroxides (Pd-LDHs) for for acceptorless amine dehydrogenation is reported. These multifunctional catalysts comprise Brønsted basic and Lewis acidic surface sites that stabilize Pd species in 0, 2+, and 4+ oxidation states. Pd speciation and corresponding cataytic performance is a strong function of metal loading. Excellent activity is observed for the oxidative transamination of primary amines and acceptorless dehydrogenation of secondary amines to secondary imines using a low Pd loading (0.5 mol%), without the need for oxidants. N-heterocycles, such as indoline, 1,2,3,4-tetrahydroquinoline, and piperidine, are dehydrogenated to the corresponding aromatics with high yields. The relative yields of secondary imines are proportional to the calculated free energy of reaction, while yields for oxidative amination correlate with the electrophilicity of primary imine intermediates. Reversible amine dehydrogenation and imine hydrogenation determine the relative imine:amine selectivity. Poisoning tests evidence that Pd-LDHs operate heterogeneously, with negligible metal leaching; catalysts can be regenerated by acid dissolution and re-precipitation.</p> </div> <br>

Download Full-text

Carbonate Form of Mg,Al-Layered Double Hydroxides for Concentrating Eu(III) and Its Subsequent Analytical Determination in Natural Aqueous Media

Journal of Water Chemistry and Technology ◽

10.3103/s1063455x20050094 ◽

2020 ◽

Vol 42 (5) ◽

pp. 365-372

Author(s):

G. N. Pshinko ◽

L. N. Puzyrnaya ◽

V. S. Shunkov ◽

B. P. Yatsik

Keyword(s):

Layered Double Hydroxides ◽

Aqueous Media ◽

Analytical Determination ◽

Double Hydroxides

Download Full-text

Antibiotic-anionic Clay Matrix Used for Drug Controlled Release

Revista de Chimie ◽

10.37358/rc.18.2.6098 ◽

2018 ◽

Vol 69 (2) ◽

pp. 321-323

Author(s):

Georgeta Zegan ◽

Elena Mihaela Carausu ◽

Loredana Golovcencu ◽

Alina Sodor Botezatu ◽

Eduard Radu Cernei ◽

...

Keyword(s):

Controlled Release ◽

Layered Double Hydroxides ◽

Bioactive Molecules ◽

Drug Controlled Release ◽

Anionic Clays ◽

Anionic Clay ◽

Toxicological Studies ◽

High Efficient ◽

Clay Matrix ◽

Double Hydroxides

Anionic clay matrix acting as drug controlled release system have shown in last years a great potential for delivery of bioactive molecules and chemical therapeutics. This organic-inorganic nanohybrid system is high efficient offering an excellent protection of intercalated compounds from degradation. Compared to other nanoparticles used in medical area, anionic clays type layered double hydroxides have found to be biocompatible according to toxicological studies. Ampicillin containing MgAlLDHs and ZnAlLDH samples have been prepared following two routes: anion-exchange procedure and reconstruction from calcined layered double hydroxides. Solid samples have been characterized by FTIR and SEM-EDX highlighting the alteration of pristine LDHs structure when the antibiotic is introduced in the interlayer gallery.

Download Full-text