Synthesis and characterization of zein-based superabsorbent hydrogels and their potential as heavy metal ion chelators

Poly(acrylic acid/Kryptofix 23-Dimethacrylate) superabsorbent polymer [P (AA/Kry23-DM) SAP] was synthesized by solution polymerization to remove Co, Ni, Cu, Cd, Mn, Zn, Pb, Cr, and Fe ions in water and improve the quality of the water. Kry23-DM cross-linker (1,4,7,13,16-Pentaoxa-10,19 diazo cyclohexene icosane di methacrylate) was synthesized using Kry23 and methacryloyl chloride. The characterization of the molecules was done by FTIR, TGA, DSC, and SEM techniques. The effects of parameters such as pH, concentration, and the metal ion interaction on the heavy metal ions uptaking of SAP was investigated. It was observed that P (AA/Kry23-DM) SAP has maximum water absorption, and the absorption increases with the pH increase. Adsorption rates and sorption capacity, desorption ratios, competitive sorption (qcs), and distribution coefficient (log D) of P(AA/Kry23-DM) SAP were studied as a function of time and pH with the heavy metal ion concentration. Langmuir and Freundlich isotherms of the P (AA/Kry23-DM) SAP were investigated to verify the metal uptake. Molecular mechanic (MM2), Assisted Model Building with Energy Refinement (AMBER), and optimized potentials for liquid simulations (OPLS) methods. were used in quantum chemical calculations for the conformational analysis of the cross-linker and the SAP. ΔH0f calculations of the cross-linker and the superabsorbent were made using Austin Model 1(AM1) method.

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Characterization of a heavy metal ion transporter in the lysosomal membrane

FEBS Letters ◽

10.1016/s0014-5793(98)01133-8 ◽

1998 ◽

Vol 436 (2) ◽

pp. 223-227 ◽

Cited By ~ 31

Author(s):

Adrie C Havelaar ◽

Izaäk L de Gast ◽

Saskia Snijders ◽

Cecile E.M.T Beerens ◽

Grazia M.S Mancini ◽

...

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Lysosomal Membrane ◽

Heavy Metal Ion ◽

Ion Transporter

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Preparation and Characterization of Ceramic Hollow Microspheres for Heavy Metal Ion Removal in Wastewater

Journal of Colloid and Interface Science ◽

10.1006/jcis.2000.7064 ◽

2000 ◽

Vol 230 (2) ◽

pp. 367-376 ◽

Cited By ~ 19

Author(s):

Eunjoo Bae ◽

Soonwoo Chah ◽

Jongheop Yi

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Hollow Microspheres ◽

Heavy Metal Ion ◽

Metal Ion Removal ◽

Ion Removal ◽

Heavy Metal Ion Removal

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Characterization of water bamboo husk biosorbents and their application in heavy metal ion trapping

Microchemical Journal ◽

10.1016/j.microc.2013.11.011 ◽

2014 ◽

Vol 113 ◽

pp. 59-63 ◽

Cited By ~ 21

Author(s):

Hillary B. Asberry ◽

Chung-Yih Kuo ◽

Chin-Hau Gung ◽

Eric D. Conte ◽

Shing-Yi Suen

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Ion Trapping ◽

Heavy Metal Ion

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Characterization of carbon nano-onions for heavy metal ion remediation

Journal of Nanoparticle Research ◽

10.1007/s11051-012-1087-y ◽

2012 ◽

Vol 14 (9) ◽

Cited By ~ 26

Author(s):

Megan B. Seymour ◽

Chunming Su ◽

Yang Gao ◽

Yongfeng Lu ◽

Yusong Li

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

Heavy Metal Ion

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Fabrication and characterization of novel high-performance fluorinated polyimides with xanthene pendent architecture: Study of thermal, photophysical, antibacterial and heavy metal ion adsorption behavior

Journal of Fluorine Chemistry ◽

10.1016/j.jfluchem.2016.10.010 ◽

2016 ◽

Vol 192 ◽

pp. 48-57 ◽

Cited By ~ 15

Author(s):

Seyed Mojtaba Amininasab ◽

Soheila Esmaili ◽

Mehdi Taghavi ◽

Zahed Shami

Keyword(s):

Heavy Metal ◽

Metal Ion ◽

High Performance ◽

Adsorption Behavior ◽

Heavy Metal Ion ◽

Ion Adsorption ◽

Metal Ion Adsorption ◽

Fluorinated Polyimides ◽

Fabrication And Characterization

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The effects of a Ca2+ chelator and heavy-metal-ion chelators upon Ca2+ oscillations and activation at fertilization in mouse eggs suggest a role for repetitive Ca2+ increases

Biochemical Journal ◽

10.1042/bj3350335 ◽

1998 ◽

Vol 335 (2) ◽

pp. 335-342 ◽

Cited By ~ 46

Author(s):

Yvonne LAWRENCE ◽

Jean Pierre OZIL ◽

Karl SWANN

Keyword(s):

Heavy Metal ◽

Protein Synthesis ◽

Acetic Acid ◽

Metal Ion ◽

Heavy Metal Ion ◽

Egg Activation ◽

Acetoxymethyl Ester ◽

Pronuclear Formation ◽

Mouse Eggs ◽

Metal Ion Chelators

During fertilization in mouse eggs, the sperm triggers a series of intracellular Ca2+ oscillations that lead to egg activation, as indicated by pronuclear formation. We show that Ca2+ oscillations in fertilized mouse eggs can be inhibited by addition of either the Ca2+ chelator 1,2-bis-(o-aminophenoxy)ethane-N,N,N´,N´-tetra-acetic acid acetoxymethyl ester (BAPTA-AM) or the heavy-metal-ion chelator N,N,N´,N´-tetrakis-(2-pyridylmethyl)ethylenediamine (TPEN) plus dithiothreitol (DTT). Both treatments inhibited Ca2+ oscillations, but they had different effects upon egg activation. Blocking Ca2+ oscillations with BAPTA-AM after the occurrence of just two Ca2+ spikes resulted in most eggs forming pronuclei. However, we found that BAPTA-AM-treated fertilizing eggs showed a decreased rate of protein synthesis, which by itself can promote egg activation. In contrast, blocking Ca2+ oscillations with TPEN plus DTT was accompanied by the inhibition of egg activation with no significant effect on protein synthesis. In eggs that were fertilized and then treated with TPEN plus DTT, there was a correlation between the number of Ca2+ spikes and the proportion of eggs that formed pronuclei, as well as between the number of Ca2+ spikes and the time taken for pronuclear formation and the first mitosis to occur. The addition of TPEN plus DTT did not block the generation of Ca2+ spikes or pronuclear formation when eggs were artificially stimulated by electroporation pulses. These data suggest that TPEN plus DTT inhibits pronuclear formation in fertilizing eggs via the inhibition of Ca2+ oscillations and that the number of Ca2+ spikes may regulate egg activation.

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