Results 21 to 30 of about 197,191 (349)

A review of acid recovery from acidic mining waste solutions using solvent extraction [PDF]

open access: yes, 2018
This is the peer reviewed version of the following article: Uchenna Kesieme, Andreas Chrysanthou, Maurizio Catulli, and Chu Yong Cheng, ‘A review of acid recovery from acidic mining waste solutions using solvent extraction’, Journal of Chemical ...
Catulli, Maurizio   +3 more
core   +2 more sources

Studies on adsorption of rare earth elements from nitric acid solution with macroporous silica-based bis(2-ethylhexyl)phosphoric acid impregnated polymeric adsorbent

open access: yesAdsorption Science & Technology, 2018
For the adsorption and recovery of rare earth elements from aqueous nitric acid, solid-phase extraction resins were prepared by impregnating and immobilizing of bis(2-ethylhexyl)phosphoric acid extractant into the macroporous silica-based polymeric (SiO ...
Qiding Shu   +3 more
doaj   +1 more source

The Effect of Different Acid Treatments on Shear Bond Strength Between Monolithic Zirconia and Dentin Surface

open access: yesCumhuriyet Dental Journal, 2021
Objective: The aim of this study is to evaluate the effect of dentin surface treatments with citric, tartaric, phosphoric, and boric acids on the bonding strength of monolithic zirconia.
Oguzhan Gorler, Melih Ulgey
doaj   +1 more source

Comparison of the effects of pre-activators on morphology and corrosion resistance of phosphate conversion coating on magnesium alloy

open access: yesJournal of Magnesium and Alloys, 2022
In this study, Mg–6.0Zn–3.0Sn–0.5Mn (ZTM630) magnesium alloy was pre-activated by colloidal Ti, oxalic acid, and phosphoric acid, and a phosphate conversion coating (PCC) was prepared on the alloy surface.
Tao Li   +6 more
doaj   +1 more source

Evaluation of Different Capture Solutions for Ammonia Recovery in Suspended Gas Permeable Membrane Systems

open access: yesMembranes, 2022
Gas permeable membranes (GPM) are a promising technology for the capture and recovery of ammonia (NH3). The work presented herein assessed the impact of the capture solution and temperature on NH3 recovery for suspended GPM systems, evaluating at a ...
María Soto-Herranz   +3 more
doaj   +1 more source

Modification of Amberlite XAD-2 resin for U(VI) adsorption from Egyptian crude phosphoric acid

open access: yesEgyptian Journal of Petroleum, 2019
Adsorption of U(VI) from Egyptian crude phosphoric acid was studied using the modified Amberlite XAD-2 resin. Modification process was performed by soaking Amberlite XAD-2 resin in tri-butyl phosphate (TBP) and di-2-ethyl hexyl phosphoric acid (D2EHPA ...
A.M. El Didamony   +2 more
doaj   +1 more source

Effect of Co-solution of Carbon Precursor and Activating Agent on the Textural Properties of Highly Porous Activated Carbon Obtained by Chemical Activation of Lignin With H3PO4

open access: yesFrontiers in Materials, 2020
This work analyzes the effect of co-solution of carbon precursor and activating agent on the textural and surface chemistry properties of highly nanoporous activated carbons obtained by chemical activation of Alcell lignin with phosphoric acid.
Imane Moulefera   +6 more
doaj   +1 more source

The Effect of Enamel Etching with Different Acids on the Bond Strength of Brackets

open access: yesTurkish Journal of Orthodontics, 2007
The purpose of this study was to compare the bond strengths of metallic brackets on human enamel etched with different acid solutions including (1) 37% phosphoric acid, (2) 10% maleic acid, (3) 37% phosphoric acid with i.23% NaF addition, (4) 10% maleic ...
Ayşegül Baş-Kalkan   +2 more
doaj   +1 more source

Antimicrobial and cytotoxic effects of phosphoric acid solution compared to other root canal irrigants

open access: yesJournal of Applied Oral Science, 2015
Phosphoric acid has been suggested as an irrigant due to its effectiveness in removing the smear layer. Objectives : The purpose of this study was to compare the antimicrobial and cytotoxic effects of a 37% phosphoric acid solution to other irrigants ...
Maíra PRADO   +6 more
doaj   +1 more source

Assessment of the structural evolution of polyimide-derived carbons obtained by phosphoric acid activation using Fourier transform infrared and Raman spectroscopy

open access: yesAdsorption Science & Technology, 2017
Two series of carbons obtained by carbonization of porous copolymer of 4,4′-bis(maleimidodiphenyl) methane (50 mol%) and divinylbenzene (50 mol%) with and without phosphoric acid (impregnation ratio 1.1) at temperatures 400–1000℃.
Alexander M Puziy   +3 more
doaj   +1 more source

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