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1. A novel poly ligand exchanger – Cu(II)-loaded chelating resin for the removal of ammonia-nitrogen in aqueous solutions

Author:
Wang, Aihe,   et al.   ; Chen, Quanzhou; Zhou, Kanggen; Chen, Yan; Liu, Fang;     Show all 5 Authors
Source:
Environmental technology 2017 v.38 no.22 pp. 2824-2834
ISSN:
1479-487X
Subject:
adsorbents; adsorption; ambient temperature; ammonia; ammonium nitrogen; aqueous solutions; calcium; copper; environmental technology; ions; ligands; models; moieties; pH; sodium; sorption isotherms
Abstract:
... In this paper, a poly ligand exchanger, Cu(II)-loaded chelating resin bearing the functional group of weak iminodiacetate acid was prepared to efficiently remove ammonia from solutions. Batch adsorption equilibrium experiments were conducted under a range of conditions to determine the optimum adsorption conditions. The effects of contact time, pH, resin dosage and temperature on the removal of am ...
DOI:
10.1080/09593330.2017.1278793

2. Development of Mg–Al–La tri-metal mixed oxide entrapped in alginate for removal of fluoride from wastewater

Author:
Wang, Aihe,   et al.   ; Zhou, Kanggen; Liu, Xing; Liu, Fang; Chen, Quanzhou;     Show all 5 Authors
Source:
RSC advances 2017 v.7 no.50 pp. 31221-31229
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; alginates; anions; biopolymers; carbonates; data analysis; fluorides; heat production; models; nitrates; scanning electron microscopy; sorption isotherms; sulfates; wastewater
Abstract:
... New biopolymer beads, composed of a Mg–Al–La tri-metal oxide (MAL) and alginate (SA), were synthesized, characterized and tested for their fluoride removal efficiency from wastewater. The morphology and properties of the beads were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM). Batch sorption studies w ...
DOI:
10.1039/c7ra02566a

3. Removal of ammonia from aqueous solutions by ligand exchange onto a Cu(ii)-loaded chelating resin: kinetics, equilibrium and thermodynamics

Author:
Wang, Aihe,   et al.   ; Chen, Quanzhou; Zhou, Kanggen; Chen, Yan; Liu, Fang;     Show all 5 Authors
Source:
RSC advances 2017 v.7 no.21 pp. 12812-12823
ISSN:
2046-2069
Subject:
Fourier transform infrared spectroscopy; adsorption; ammonia; aqueous solutions; copper; ligands; models; moieties; pH; porosity; sorption isotherms; surface area; temperature; texture; thermodynamics
Abstract:
... A poly ligand exchanger (PLE), Cu(ii)-loaded chelating resin (ammonia adsorption reagent, named AMAR) was prepared to efficiently remove ammonia from solutions by ligand exchange. The kinetics, equilibrium and thermodynamics of the ligand sorption of ammonia onto AMAR from the synthesized solution were investigated under different experimental conditions. AMAR was characterized using FT-IR and a M ...
DOI:
10.1039/c6ra28287c

4. Granular tri-metal oxide adsorbent for fluoride uptake: Adsorption kinetic and equilibrium studies

Author:
Wang, Aihe,   et al.   ; Zhou, Kanggen; Liu, Xing; Liu, Fang; Zhang, Chun; Chen, Quanzhou;     Show all 6 Authors
Source:
Journal of colloid and interface science 2017 v.505 pp. 947-955
ISSN:
0021-9797
Subject:
adsorbents; adsorption; anions; calcium alginate; carbonates; endothermy; fluorides; models; nitrates; oxides; pH; phosphates; sorption isotherms; sulfates; temperature; thermodynamics; wastewater
Abstract:
... A novel adsorbent embedding Mg-Al-Zr mixed oxides with millimetre-sized calcium alginate beads (SA-CMAZ) was synthesized, characterized, and applied for the secondary removal of fluoride from wastewater. Key factors affecting the fluoride adsorption, including initial fluoride concentration, contact time, initial pH and coexisting anions, were investigated. The results showed that fluoride could b ...
DOI:
10.1016/j.jcis.2017.06.074