scholarly journals Screening Different Divalent and Trivalent Metals Containing Binary and Ternary Layered Double Hydroxides for Optimum Phosphate Uptake

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Sattam Fahad Almojil ◽  
Mohamed Abdelhalim Othman
Keyword(s):  
Layered Double Hydroxides ◽  
Phosphate Uptake ◽  
Synergistic Effects ◽  
Bet Surface Area ◽  
Primary Role ◽  
Specific Element ◽  
Phosphate Ion ◽  
Sorbent Materials ◽  
Double Hydroxides

Abstract The elements constituting a layered double hydroxides material provide many alternatives for its optimization. Ten different layered double hydroxides materials with various combinations of Ni, Cu, Zn, Al, Cr, and Fe elements were studied as sorbent materials for phosphate ion. The type of element used in the layered double hydroxides affected the uptake capacity of phosphate. The influence of a specific element alone was not the primary role of enhancing the sorption performance of phosphate ion on the LDHs material. However, using specific two or three elements together is the key to achieve the best result due to synergistic effects. BET surface area of the sorbent showed no correlation with phosphate uptake. From the examined materials, Four layered double hydroxides of Cu-Zn-Cr, Zn-Cr, Ni-Al, and Cu-Ni-Cr showed high phosphate sorption capability. Sorption equilibrium isotherm, reaction kinetics, and desorption of phosphate from the sorbent materials were also investigated.

Exploring the role of stearic acid in modified zinc aluminum layered double hydroxides and their acrylonitrile butadiene rubber nanocomposites

2014 ◽  
pp. n/a-n/a ◽  
Author(s):  
Subramani Bhagavatheswaran Eshwaran ◽  
Debdipta Basu ◽  
Sankar Raman Vaikuntam ◽  
Burak Kutlu ◽  
Sven Wiessner ◽  
...  
Keyword(s):  
Stearic Acid ◽  
Layered Double Hydroxides ◽  
Butadiene Rubber ◽  
Acrylonitrile Butadiene Rubber ◽  
Rubber Nanocomposites ◽  
Double Hydroxides

scholarly journals A Comparative Study on The Adsorption Behavior of Congo Red on to ZnAl and ZnCr Layered Double Hydroxides

2020 ◽  
Vol 9 (2) ◽  
pp. 108-116
Author(s):  
Tarmizi Taher ◽  
◽  
Nyanyu Ummu Hani ◽  
Neza Rahayu Palapa ◽  
Risfidian Mohadi ◽  
...  
Keyword(s):  
Experimental Data ◽  
Surface Area ◽  
Adsorption Kinetics ◽  
Layered Double Hydroxides ◽  
Congo Red ◽  
Adsorption Process ◽  
Bet Surface Area ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Double Hydroxides

In this work, two synthetic layered double hydroxides (LDH) consists of Zn2+ as M2+ cation with different M3+ cation, i.e., Al3+ and Cr3+ were used as an adsorbent for Congo Red removal aqueous solution. Both Zn-Al and Zn-Cr LDH were characterized by X-ray diffraction, FT-IR, and BET surface area analyzer. The effect of contact time, initial dye concentration, and temperature were evaluated in a batch technique in order to investigate the characteristic of Congo Red adsorption onto both adsorbents. The experimental data were assessed according to the parameter of adsorption kinetics, isotherm, and thermodynamics. The results of LDH characterization showed that Zn-Al LDH has a higher interlayer distance than Zn-Cr LDH, although Zn-Cr LDH has a higher surface area. The FT-IR analysis indicated the interlayer space of both Zn-Cr and Zn-Al LDH was dominated by CO32- as the interlayer anion species. The adsorption kinetics study of Congo Red on both LDH revealed that the adsorption process followed the pseudo-second-order model. For the adsorption isotherm, the experimental data fit well with the Freundlich model rather than the Langmuir model. The thermodynamic study indicated that the adsorption process that occurred on both adsorbents was spontaneous with exothermic nature.

Enhanced catalytic phenol hydroxylation by CuZnFeAl layered double hydroxides: synergistic effects of Cu+ and oxygen vacancies

2021 ◽  
Vol 45 (1) ◽  
pp. 179-188
Author(s):  
Yong Jiang ◽  
Wenlong Xu ◽  
Jinhua Liang ◽  
Jiecan Shen ◽  
Xiaomin Fu ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Oxygen Vacancies ◽  
Synergistic Effects ◽  
Phenol Oxidation ◽  
Precipitation Method ◽  
Phenol Hydroxylation ◽  
Co Precipitation ◽  
Double Hydroxides

In this work, a series of CuZnFeAl-LDH catalysts for phenol oxidation to dihydroxybenzene have been prepared through a co-precipitation method.

Activating room temperature phosphorescence by organic materials using synergistic effects

2019 ◽  
Vol 7 (2) ◽  
pp. 230-236 ◽  
Author(s):  
Xianggui Kong ◽  
Xinrui Wang ◽  
Huimin Cheng ◽  
Yufei Zhao ◽  
Wenying Shi
Keyword(s):  
Layered Double Hydroxides ◽  
Chemical Bonding ◽  
Room Temperature ◽  
Design Principle ◽  
Synergistic Effects ◽  
Heavy Atom ◽  
Room Temperature Phosphorescence ◽  
Host Matrix ◽  
Double Hydroxides ◽  
Atom Effect

We present a design principle to activate highly efficient organic room temperature phosphorescent (ORTP) of carbon dots (CDs), with layered double hydroxides (LDHs) as the host matrix, that utilizes three synergistic effects,i.e.structural confinement effect, heavy atom effect, and chemical bonding.

scholarly journals In-situ layered double hydroxides on Mg−Ca alloy: Role of calcium in magnesium alloy

2021 ◽  
Vol 31 (6) ◽  
pp. 1612-1627
Author(s):  
Yu XIA ◽  
Liang WU ◽  
Wen-hui YAO ◽  
Meng HAO ◽  
Jing CHEN ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Layered Double Hydroxides ◽  
Double Hydroxides

scholarly journals Phosphate Import at the Arbuscule: Just a Nutrient?

2011 ◽  
Vol 24 (11) ◽  
pp. 1296-1299 ◽  
Author(s):  
Shu-Yi Yang ◽  
Uta Paszkowski
Keyword(s):  
Plant Growth ◽  
Phosphate Uptake ◽  
Arbuscular Mycorrhizal ◽  
Arbuscular Mycorrhizal Symbiosis ◽  
Mycorrhizal Symbiosis ◽  
Phosphate Ion ◽  
Cortex Cell

Central to the mutualistic arbuscular mycorrhizal symbiosis is the arbuscule, the site where symbiotic phosphate is delivered. Initial investigations in legumes have led to the exciting observation that symbiotic phosphate uptake not only enhances plant growth but also regulates arbuscule dynamics and is, furthermore, required for maintenance of the symbiosis. This review evaluates the possible role of the phosphate ion, not only as a nutrient but also as a signal that is necessary for reprogramming the host cortex cell for symbiosis.

Sign in / Sign up

Export Citation Format

Share Document