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In this study, a series of layered double hydroxide (ZxAy LDH) material was synthesized with different molar ratios and calcination temperatures to remove phosphate and sulfate ions from synthetic solution. ZxAy LDH was characterized by XRD, FTIR, BET and SEM analysis. The highest removal was obtained by Z3A200 LDH that is LDH with a Zn-Al molar ratio of 3 and calcined at 200 °C. The leaching of Zn and Al was more under highly acidic pH compared to pH 5 and 8. Adsorption isotherms data had a good fit with Langmuir model and maximum adsorption under optimum conditions led to 2.6-2.72 and 1.02-1.31 mmol/g for phosphate and sulfate, respectively. Kinetic studies have been performed by applying reaction based models and diffusion-based models, which indicated the chemisorption interaction for Z3A200 by a controlling step of the macro-pore and micro-pore diffusion for phosphate and sulfate adsorption process onto Z3A200, respectively. Thermodynamic studies showed that adsorption process onto Z3A200 was endothermic and spontaneous. Thus, phosphate and sulfate adsorption by using optimized Zn-Al LDH appears to be a promising adsorbent for their removal.
This article was published in the following journal.
Recently, a considerable attention has been paid on the preparation of layered double hydroxide (LDH) as a green adsorbent. This research presents a study on nickel and lead removal by Ca/Fe layered d...
Porous structure and effective active site are beneficial for gaseous elemental mercury (Hg) capture. Two kinds of hierarchical porous layered double hydroxides (LDHs) were synthesized through an in-s...
This study aimed to develop a novel in-situ method to directly remove toxic hexavalent chromium anions from groundwater. The characteristics of Mg/Al-layered double hydroxides (LDH) involving in-situ ...
Layered double oxides (LDO) and γ-FeO have been demonstrated to be promising adsorbents to remove radioactive elements from aqueous media. Herein, magnetic γ-FeO nanoparticles decoration onto porous...
Hydrogels comprising anionic substituents in their polymer network were synthesized and adhered to each other following application of layered double hydroxides (LDHs) onto their surfaces. The resulti...
Assessment of the impact of oral Human Milk Oligosaccharides (HMO) application on acute diarrhoea and the development of prolonged and persistent diarrhoea in paediatric patients hospitali...
Cytokine adsorption using the cytosorb adsorber is currently investigated to reduce the levels of proinflammatory cytokines in patients with severe sepsis and septic shock. The adsorber is...
The aim of this study is to demonstrate onabotulinumtoxinA superiority to aluminium chloride for the treatment of residual limb hyperhidrosis.
This is a randomized, placebo-controlled, parallel group, patient-blind, single-center phase I clinical trial of repeated once every 4 weeks administration by subcutaneous injection of AFF...
Abstract Objectives: Use of analgesics is the most common method to alleviate the pain induced by chest tube removal (CTR), but patient response to medication can vary and may not be achie...
A double-layered fold of peritoneum that attaches the STOMACH to other organs in the ABDOMINAL CAVITY.
The double-layered skin fold that covers the GLANS PENIS, the head of the penis.
Large spherical double-layered structures which function in AUTOPHAGY to engulf intracellular components such as ORGANELLES or pathogens. Their outer membrane then fuses with the LYSOSOME and the inner membrane and contents are digested by lysosomal HYDROLASES.
Double-layered inflatable suits which, when inflated, exert pressure on the lower part of the wearer's body. The suits are used to improve or stabilize the circulatory state, i.e., to prevent hypotension, control hemorrhage, and regulate blood pressure. The suits are also used by pilots under positive acceleration.
Inorganic compounds that contain the OH- group.