scholarly journals Novel Thermosensitive-co-Zwitterionic Sulfobetaine Gels for Metal Ion Removal: Synthesis and Characterization

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 273
Author(s):  
Eva Oktavia Ningrum ◽  
Takehiko Gotoh ◽  
Wirawan Ciptonugroho ◽  
Achmad Dwitama Karisma ◽  
Elly Agustiani ◽  
...  
Keyword(s):  
Metal Ion ◽  
Industrial Effluents ◽  
Proton Nuclear Magnetic Resonance ◽  
Ion Adsorption ◽  
Temperature Dependent ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Positively Charged

Zwitterionic betaine polymers are promising adsorbents for the removal of heavy metal ions from industrial effluents. Although the presence of both negative and positively charged groups imparts them the ability to simultaneously remove cations and anions, intra- and/or inter-chain interactions can significantly reduce their adsorption efficiencies. Therefore, in this study, novel gels based on crosslinked co-polymers of thermosensitive N-isopropylacrylamide (NIPAAM) and zwitterionic sulfobetaine N,N-dimethylacrylamido propyl ammonium propane sulfonate (DMAAPS) were synthesized, characterized, and evaluated for ion removal. Fourier-transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) analyses confirmed the success of the co-polymerization of NIPAAM and DMAAPS to form poly(NIPAAM-co-DMAAPS). The phase transition temperature of the co-polymer increased with increasing DMAAPS content in the co-polymer, indicating temperature-dependent amphiphilic behavior, as evidenced by contact angle measurements. The ion adsorption analyses of the poly(NIPAAM-co-DMAAPS) gels indicated that co-polymerization increased the molecular distance and weakened the interaction between the DMAAPS-charged groups (SO3− and N+), thereby increasing the ion adsorption. The results confirmed that, with a low concentration of DMAAPS in the co-polymer gels (~10%), the maximum amount of Cr3+ ions adsorbed onto the gel was ~58.49% of the sulfonate content in the gel.

scholarly journals Column Study on the Removal of Metals from Industrial Effluents using the Biomass Sargassum sp

2012 ◽  
pp. 6-9
Author(s):  
A. Saravanan ◽  
Uvaraja Uvaraja ◽  
Nishanth Nishanth ◽  
Soundarajan Krishnan
Keyword(s):  
Heavy Metals ◽  
Metal Ion ◽  
Human Life ◽  
Industrial Effluents ◽  
Chemical Precipitation ◽  
Electrochemical Treatment ◽  
Chemical Oxidation ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Oxidation Reduction

Heavy metals are ubiquitous environmental contaminants in industrialized societies. The presence of heavy metals in the environment is of major concern because of their toxicity, bio-accumulating tendency, threat to human life and the environment. Traditional methods have been used to remove heavy metals from effluent include chemical precipitation, chemical oxidation/reduction, ion exchange, electrochemical treatment, evaporation and filtration. Many of these methods are ineffective; resulting in low levels of metal ion removal and can also be economically inefficient. Biomass of brown marine macro algae is a renewable biological resource, which is available in large quantities and can form a good base for the development of biosorbent material. The work considered the parameters of the effluents and the experimental column model for the metal adsorption. Among the experimental model Thomas model fitted the column biosorption data well.

scholarly journals Preparation and characterization of andisol-zeolite-fly ash-activated carbon (AZFC) as potential adsorbent for metal ion removal

2020 ◽  
Author(s):  
Antonius Agus Bambang Haryanto ◽  
Ari Handono Ramelan ◽  
MTh Sri Budiastuti ◽  
Pranoto
Keyword(s):  
Activated Carbon ◽  
Fly Ash ◽  
Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal

Heavy and toxic metal ion removal by a novel polymeric ion-exchanger: synthesis, characterization, kinetics and equilibrium studies

2014 ◽  
Vol 90 (12) ◽  
pp. 2170-2179 ◽  
Author(s):  
Raja S. Azarudeen ◽  
Mohamed A. Riswan Ahamed ◽  
R. Subha ◽  
Abdul R. Burkanudeen
Keyword(s):  
Metal Ion ◽  
Toxic Metal ◽  
Ion Exchanger ◽  
Equilibrium Studies ◽  
Metal Ion Removal ◽  
Ion Removal

Lignin-based adsorbent materials for metal ion removal from wastewater: A review

2021 ◽  
Vol 167 ◽  
pp. 113510
Author(s):  
Paola Santander ◽  
Bryan Butter ◽  
Estefanía Oyarce ◽  
Mauricio Yáñez ◽  
Ling-Ping Xiao ◽  
...  
Keyword(s):  
Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Adsorbent Materials

scholarly journals Fabrication of mesoporous lignin-based biosorbent from rice straw and its application for heavy-metal-ion removal

2017 ◽  
Vol 53 ◽  
pp. 132-140 ◽  
Author(s):  
Fang Xu ◽  
Ting-Ting Zhu ◽  
Qing-Quan Rao ◽  
Sheng-Wen Shui ◽  
Wen-Wei Li ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Rice Straw ◽  
Metal Ion ◽  
Heavy Metal Ion ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Heavy Metal Ion Removal

Chelating water-soluble polymers associated with ultrafiltration membranes for metal ion removal

2012 ◽  
Vol 69 (8) ◽  
pp. 881-898 ◽  
Author(s):  
Bernabé L. Rivas ◽  
Sara Hube ◽  
Julio Sánchez ◽  
Eduardo Pereira
Keyword(s):  
Metal Ion ◽  
Water Soluble ◽  
Ultrafiltration Membranes ◽  
Water Soluble Polymers ◽  
Metal Ion Removal ◽  
Soluble Polymers ◽  
Ion Removal

scholarly journals Removal of barium, cobalt, strontium and zinc from solution by natural and synthetic allophane adsorbents

2018 ◽  
Author(s):  
Andre Baldermann ◽  
Andrea Cäcilia Grießbacher ◽  
Claudia Baldermann ◽  
Bettina Purgstaller ◽  
Ilse Letofsky-Papst ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Physical Adsorption ◽  
Ion Concentration ◽  
Pseudo First Order Reaction ◽  
Uptake Mechanism ◽  
Nano Structure ◽  
Metal Ion Removal ◽  
Ion Removal ◽  
Transmission Electron

The capacity and the mechanism of the adsorption of aqueous barium (Ba), cobalt (Co), strontium (Sr) and zinc (Zn) by Ecuadorian (NatAllo) and synthetic (SynAllo-1 and SynAllo-2) allophanes were studied as a function of contact time, pH and metal ion concentration using kinetic and equilibrium experiments. The mineralogy, nano-structure and chemical composition of the allophanes were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy and specific surface area analyses. The evolution of adsorption fitted to a pseudo-first-order reaction kinetics, where equilibrium between aqueous metal ions and allophane was reached within < 10 min. The metal ion removal efficiencies varied from 0.7 to 99.7 % at pH 4.0 to 8.5. At equilibrium, the adsorption behavior is better described by the Langmuir model than by the Dubinin-Radushkevich model, yielding sorption capacities of 10.6, 17.2 and 38.6 mg/g for Ba^(2+), 12.4, 19.3 and 29.0 mg/g for HCoO_2^-, 7.2, 15.9 and 34.4 mg/g for Sr^(2+) and 20.9, 26.9 and 36.9 mg/g for Zn^(2+), respectively, by NatAllo, SynAllo-2 and SynAllo-1. The uptake mechanism is based on a physical adsorption process. Allophane holds great potential to remove aqueous metal ions and could be used instead of zeolites, montmorillonite, carbonates and phosphates for wastewater treatment.

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