Removal of Ammonia from Aqueous Solutions, Ground Water, and Wastewater Using Mechanically Activated Clinoptilolite and Synthetic Zeolite-A: Kinetic and Equilibrium Studies

In this work, the potential of ouricuri (Syagrus coronata) fiber as a novel biosorbent to remove methylene blue (MB) from aqueous solutions was investigated. The fiber was prepared and characterized according to the fundamental features for adsorption. A 23 experimental design was used to evaluate the effects of adsorbent dosage (M), fiber diameter (D) and agitation (A) on the adsorption capacity. In the more adequate conditions, kinetic and equilibrium studies were performed. The experimental design results showed that M = 10 g L−1), D = 0.595 mm and A = 200 rpm were the more adequate conditions for MB adsorption. Based on the kinetic study, it was found that the adsorption process was fast, being the equilibrium was attained at about 5 min, with 90% of color removal. The isotherm was properly represented by the Sips model, and the maximum adsorption capacity was 31.7 mg g−1. In brief, it was demonstrated that ouricuri fiber is an alternative biosorbent to remove MB from aqueous media, taking into account the process efficiency and economic viewpoint.

Download Full-text

Amine-Based Extraction Recovery of Cu(II) from Aqueous Solutions in the Presence of EDTA. Equilibrium Studies

Separation Science and Technology ◽

10.1081/ss-100100824 ◽

1999 ◽

Vol 34 (15) ◽

pp. 3099-3112 ◽

Cited By ~ 14

Author(s):

RUEY-SHIN JUANG ◽

YUAN-JENG CHEN ◽

I-PYNG HUANG

Keyword(s):

Aqueous Solutions ◽

Equilibrium Studies ◽

Extraction Recovery

Download Full-text

Equilibrium studies of yttrium adsorption from aqueous solutions by titanium dioxide

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2020.109473 ◽

2020 ◽

pp. 109473

Author(s):

Hanna Vasylyeva ◽

Ivan Mironyuk ◽

Igor Mykytyn ◽

Khrystyna Savka

Keyword(s):

Titanium Dioxide ◽

Aqueous Solutions ◽

Equilibrium Studies

Download Full-text

Adsorption of bisphenol A (BPA) from aqueous solutions by carbon nanotubes: kinetic and equilibrium studies

Desalination and Water Treatment ◽

10.1080/19443994.2014.884682 ◽

2014 ◽

Vol 54 (1) ◽

pp. (iii)-(iii)

Author(s):

Mohammad Hadi Dehghani ◽

Amir Hossein Mahvi ◽

Noushin Rastkari ◽

Reza Saeedi ◽

Shahrokh Nazmara ◽

...

Keyword(s):

Carbon Nanotubes ◽

Bisphenol A ◽

Aqueous Solutions ◽

Equilibrium Studies

Download Full-text

Synthesis characterization and sorption properties of a sorbent synthesized using slag and red mud: Arsenic removal from spiked aqueous solutions

Global NEST Journal ◽

10.30955/gnj.001873 ◽

2016 ◽

Vol 18 (2) ◽

pp. 339-347 ◽

Cited By ~ 1

Keyword(s):

Aqueous Solutions ◽

Red Mud ◽

Arsenic Removal ◽

Point Of Zero Charge ◽

Maximum Adsorption Capacity ◽

X Ray Diffraction ◽

Equilibrium Studies ◽

Metallurgical Wastes ◽

Bet Method ◽

Gf Aas

<p>The aim of the present study was to synthesize a sorbent, for arsenic removal from aqueous solutions, reusing two waste materials (slag and red mud). The sorbent was prepared after chemical and thermal treatment, during which amorphous silica sol and FeOOH sol were produced simultaneously and form Fe-Si complexes on the surface of the slag. To characterize the sorbent Powder X-ray diffraction (XRD); Fourier transform infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM-EDX) were applied. The surface area (BET method) and the Point of Zero Charge (PZC) of the sorbent were determined.). The sorption efficiency of the sorbent produced was investigated with kinetic and equilibrium studies, performed in batch conditions. The concentration of arsenic in solutions was determined by electro thermal atomic absorption spectroscopy (GF-AAS). The results of the study showed that with the described process, using metallurgical wastes, iron oxyhydroxides were “loaded” onto slag producing an effective sorbent for arsenic removal. Kinetic experiments proved that equilibrium was achieved within 15 hours, while the maximum adsorption capacity as evidenced by equilibrium experiments, was 16.14 mg g<sup>-1</sup>. Data proved to fit better to the Langmuir equation.</p>

Download Full-text