The effect of heavy metal ions hydration on their sorption by a mesoporous titanium phosphate ion-exchanger

Маслова, М. В.; Иваненко, В. И.; Yanicheva, Natalia; Герасимова, Л. Г.

doi:10.1016/j.jwpe.2020.101233

Cited by 31 publications

(10 citation statements)

References 44 publications

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“…The binding process between Cd 2+ and AGSP yielded a positive ΔH value, indicating that the binding reaction was an endothermic process. Previous results suggested that the dehydration process of Cd 2+ during the interaction might result in a positive ΔH value, 21 while the direct interaction between a metal ion and a biomacromolecule, such as the formation of a coordination bond, tends to yield a negative ΔH value. 22 Additionally, titrating the Cd 2+ solution into the buffer without AGSP was an exothermic process, which implied the hydration of Cd 2+ .…”

Section: ■ Resultsmentioning

confidence: 99%

Enhanced Cytotoxicity of Cadmium by a Sulfated Polysaccharide from Abalone

Wang

Song

et al. 2020

J. Agric. Food Chem.

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Consumption of seafood is a common route of cadmium ion (Cd2+) exposure to consumers. The seafood matrices may alter the toxicity profile of Cd2+ due to the interaction between Cd2+ and biomacromolecules in seafood. In this study, enhanced cytotoxicity of Cd2+ was found in the presence of an abalone gonad sulfated polysaccharide (AGSP) and the mechanism was investigated at a metabolic level. The formation of the AGSP–Cd2+ complex was demonstrated by isothermal titration calorimetry. The level of reactive oxygen species (ROS) increased and mitochondrial membrane potential reduced upon exposure to the AGSP–Cd2+ complex as compared with those of Cd2+ exposure. The decreased cell viability after incubation with the AGSP–Cd2+ complex also suggested enhanced Cd2+ toxicity induced by AGSP. The metabolomics and lipidomics analysis revealed that, compared with the Cd2+ group, the AGSP–Cd2+ downregulated the phospholipid metabolism and resulted in more serious damage in the cellular membrane. The lipid metabolism disorder, in turn, amplified the generation of ROS, leading to a decrease in cell viability. These results provided new evidence of the enhanced Cd2+ toxicity upon interaction with seafood polysaccharides, and much attention should be paid to the effect of food ingredients on heavy metal ion toxicity.

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Section: ■ Resultsmentioning

confidence: 99%

Enhanced Cytotoxicity of Cadmium by a Sulfated Polysaccharide from Abalone

Wang

Song

et al. 2020

J. Agric. Food Chem.

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“…43 The covalent index is a parameter computed using the following expression: X m 2 r, where X m is electronegativity and r is ionic radius. 44 DTC-SDS uses S-atoms in the polar groups of the structure to trap heavy metal ions, which then generate chemical bonds to produce insoluble covalent chelates, forming a quaternary ring with a heavy metal core. 46 The spatial assignment of the electron-giving group around the central ion plays a decisive role in the angle of the bonding orbital assignment of the metal ion.…”

Section: Table 2 Kinetic Resultsmentioning

confidence: 99%

Synthesis of a Novel Dithiocarbamate Surfactant Derivative Adsorbent for Efficient Removal of Heavy Metal Ions

Wang,

Qi,

Xiong

et al. 2023

ACS Omega

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In this work, a novel heavy metal chelating agent (DTC-SDS) containing dithiocarbamate (DTC) was synthesized using sodium dodecyl sulfate (SDS), formaldehyde, and carbon disulfide. DTC-SDS has excellent trapping performance under pH 1−7 and initial concentrations 100−500 mg/L. With the increase in adsorbent dose, the adsorption amount of DTC-SDS increases and then decreases, and the optimized dosage of DTC-SDS is 0.02 g. The DTC-SDS adsorbent exhibits superior adsorption capacity (191.01, 111.7, and 79.14 mg/g) and high removal rates (97.99%, 98.48%, and 99.91%) for Mn 2+ , Zn 2+ , and Pb 2+ respectively, in wastewater. Such remarkable adsorption performance could be attributed to the strong trapping effect on heavy metal ions by the C−S bond of DTC-SDS. The liquid adsorbent was in full contact with heavy metal ions, which further enhanced the complexation of heavy metal ions. The adsorption isothermal model showed that the adsorption process was typical of Langmuir monomolecular layer adsorption. Kinetic studies showed that the pseudo-second-order kinetic model fits the experimental adsorption data better than the pseudo-first-order kinetic model. In the ternary metal species system (Mn 2+ , Zn 2+ , and Pb 2+ ), DTC-SDS preferentially adsorbed Pb 2+ due to its highest covalent index. The main controlling step is the chemical interaction between the active groups of DTC-SDS and the heavy metal ions. This work provides valuable insights into the adsorption of heavy metal ions onto dithiocarbamate, which could guide the development of other heavy metal chelating agents and be beneficial for developing novel treatments of wastewater contaminated with heavy metals.

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“…Among those ions with the same charge, the tendency of adsorption capacity increased with the radius reduction of heavy metal cations in water (hydrated radius) in the order: Pb 2+ < Ni 2+ < Cu 2+ < Cd 2+ as shown in Table 3. Due to electrostatic effect and the metal binding strength increases with the decrement of the hydrated metal cation radius [4,27,28]. However, the actual ion exchange of -COO -Na + group with metal cations also depend on the other factor such as pH, charge density and ionic strength that had influenced on adoption capacity.…”

Section: Adsorption Capacity Of Heavy Metal Cations On Cellulose Based Ion Exchange Resinsmentioning

confidence: 99%

Effect of Chelating Agents on Removal of Heavy Metal Cations of Cellulose-based Ion Exchange Resins from Water Hyacinth

et al. 2021

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Presently, heavy metal pollution in natural water resources is considered very hazardous. The purpose of this research is to develop the novel cellulose-based ion exchange resins from water hyacinth and the effect of chelating agents on the removal of heavy metal cations from single-metal aqueous solutions has been investigated. Cellulose was prepared from the stem of water hyacinth by alkaline treatment process then cellulose-based ion exchange resins were prepared via esterification reaction between cellulose with two different chelating agents such as pyromellitic dianhydride and 3,3’,4,4’- benzophenone tetracarboxylic dianhydride. The chemical structure, crystallinity index, surface morphology, and thermal stability of resins were characterized and analyzed with FTIR, XRD, SEM, and TGA, respectively. The results confirmed the esterification reaction between anhydride groups of chelating agents with hydroxyl groups of celluloses due to the apparent peak of the ester group. Heavy metal cations adsorptions were studied in optimum conditions and the residual concentration of heavy metal cations was measured by ICP. These resins showed high adsorption capacities of more than 98 mg/g for Pb2+, Cd2+, Cu2+, and Ni2+. Moreover, the adsorption process was controlled by the ion exchange mechanism. Therefore, the novel cellulose-based ion exchange resins could be suitable for the removal of pollutants from wastewater.

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The effect of heavy metal ions hydration on their sorption by a mesoporous titanium phosphate ion-exchanger

Cited by 31 publications

References 44 publications

Enhanced Cytotoxicity of Cadmium by a Sulfated Polysaccharide from Abalone

Enhanced Cytotoxicity of Cadmium by a Sulfated Polysaccharide from Abalone

Synthesis of a Novel Dithiocarbamate Surfactant Derivative Adsorbent for Efficient Removal of Heavy Metal Ions

Effect of Chelating Agents on Removal of Heavy Metal Cations of Cellulose-based Ion Exchange Resins from Water Hyacinth

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