Adsorption behaviour of pollutants: Heavy metals, radionuclides, organic pollutants, on clays and their minerals (raw, modified and treated): A review

Novikau, Raman; Lujaniené, G.

doi:10.1016/j.jenvman.2022.114685

Cited by 94 publications

(29 citation statements)

References 320 publications

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“…The smaller grain size of the 1‐OC sediment could have a toxicity‐mitigating effect, as has been seen in previous studies (Strom et al, 2011). This may be due to adsorption to clay, known to bind to a variety of organic pollutants (Novikau & Lujaniene, 2022). In a natural setting these factors should be seen to co‐occur, and one may be predictive of the others.…”

Section: Discussionmentioning

confidence: 99%

Avermectin Toxicity to Benthic Invertebrates is Modified by Sediment Organic Carbon and Chemical Residence Time

Jacova

Kennedy

2022

Enviro Toxic and Chemistry

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Chemicals used in sea lice management strategies in salmonid aquaculture include the avermectin class of compounds that can accumulate and persist in the sediments underneath salmon farms and directly impact nontarget benthic fauna. The effects of sediment organic carbon content and chemical residence time (CRT) on the lethal and sublethal toxicity of emamectin benzoate (EB; formulation: Slice®) and ivermectin (purified) and a combination of both were examined in two benthic invertebrates, the amphipod Eohaustorius estuarius and the polychaete Neanthes virens. In both species, increased sediment organic carbon content significantly reduced lethal toxicity, a modulation that was more pronounced for ivermectin and combination exposures. At a CRT of 4 months, lethal toxicity was reduced in E. estuarius but was unaffected in N. virens. Sublethal toxicity in N. virens (burrowing behavior) was modulated by sediment organic carbon and CRT in a similar manner to the trend in lethal toxicity. Inconsistencies in behavior (phototaxis) in E. estuarius made conclusions regarding toxicity modification by sediment organic carbon or CRT inconclusive. Our results indicate that environmental factors including sediment organic carbon content and the time compounds reside in sediments are important modifiers of chemotherapeutant toxicity in nontarget benthic species and should be considered when regulatory decisions regarding their use are made. Environ Toxicol Chem 2022;41:1918–1936. © 2022 SETAC

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Section: Discussionmentioning

confidence: 99%

Avermectin Toxicity to Benthic Invertebrates is Modified by Sediment Organic Carbon and Chemical Residence Time

Jacova

Kennedy

2022

Enviro Toxic and Chemistry

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“…In addition to the commonly used adsorbents like carbon, clays, zeolite, and natural and synthetic polymers, other materials with improved properties, such as composite metal organic frameworks (MOFs), have found wide application in the adsorption field. 6 − 8 …”

Section: Introductionmentioning

confidence: 99%

“…Properties such as adsorption capacity, adsorption speed, selectivity to the species to be adsorbed, and economic and practical use are decisive in the selection of an adsorbent. In addition to the commonly used adsorbents like carbon, clays, zeolite, and natural and synthetic polymers, other materials with improved properties, such as composite metal organic frameworks (MOFs), have found wide application in the adsorption field. − …”

Section: Introductionmentioning

confidence: 99%

High-Performance Material for the Effective Removal of Uranyl Ion from Solution: Computationally Supported Experimental Studies

et al. 2022

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Adsorption is a widely used method for pollution removal and for the recovery of valuable species. In recent years, the use of metal–organic compounds among the adsorbents used in adsorption studies has increased. In this study, the performance of the water-insoluble Fe complex as a metal organic framework (MOF-Fe-Ta) of water-soluble tannic acid, which is not used as an adsorbent in uranium recovery and removal, was investigated. For the characterization of the new synthesized material, Fourier transform infrared, scanning electron microscopy, and X-ray diffraction analyses were performed. The changes in the adsorption process based on various parameters were investigated and discussed. The point of zero charges value of the adsorbent was found as 5.52. It was noticed that the adsorption increases as the pH increases. Analyzing the effect of concentration on adsorption, we determined which model explained the adsorption better. The monolayer capacity of the adsorbent determined in light of the Langmuir model was reported as 0.347 mol kg –1 . The Freundlich constant, namely the β value obtained in the Freundlich model, which is a measure of surface heterogeneity, was found to be 0.434, and the E DR value, which was found from the Dubinin–Raduskevich model and accepted as a measure of adsorption energy, was 10.3 kJ mol –1 . The adsorption was kinetically explained by the pseudo-second-order model and the adsorption rate constant was reported as 0.15 mol –1 kg min –1 . The effect of temperature on adsorption was studied; it was emphasized that adsorption was energy consuming, that is, endothermic and Δ H was found as 7.56 kJ mol –1 . The entropy of adsorption was positive as 69.3 J mol –1 K –1 . As expected, the Gibbs energy of adsorption was negative (−13.1 kJ mol –1 at 25 °C), so adsorption was considered as a spontaneous process. Additionally, the power and mechanism of the interaction between studied adsorbent and adsorbate are explained through density functional theory computations. Computationally obtained data supported the experimental studies.

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“…Consequently, a large number of studies are underway in various countries to discover low-cost and environmentally friendly materials for the removal of heavy metal pollutants from the aquatic environments 11 . Clay minerals have attracted much attention in recent years because of their availability, stable structure, and low price 12 , 13 . Numerous studies have proved that natural clay minerals and their modified products have unique physical and chemical properties, such as biocompatibility, non-toxicity, and antimicrobial activity, making them effective materials for removing various pollutants from aqueous media 14 , 15 .…”

Section: Introductionmentioning

confidence: 99%

Comparison of microscopic adsorption characteristics of Zn(II), Pb(II), and Cu(II) on kaolinite

Kai-bin

Chen

et al. 2022

Sci Rep

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In this research, kaolinite was used to investigate the comparative adsorption of copper, lead, and zinc ions through batch control experiments and first principles calculations. Different adsorption conditions were considered as the effect of solution acidity, initial concentration of ions, and contact shaking time. The adsorption system isotherms and kinetic studies were better agreed with the Langmuir and pseudo-second-order kinetic models. They reached adsorption equilibrium within two hours and maximum adsorption capacities of Zn(II), Pb(II), and Cu(II) on kaolinite were 15.515, 61.523, and 44.659 mg/g, respectively. In addition, the microscopic adsorption changes of Zn(II), Pb(II), and Cu(II) on kaolinite were characterized using X-ray diffraction, Fourier transform infrared spectroscopy, and scanning electron microscopy with energy dispersive X-ray spectroscopy. The results showed that Zn(II), Pb(II), and Cu(II) were most likely to be adsorbed on the kaolinite surface. Furthermore, the adsorption mechanism of [Zn(OH)]+, [Pb(OH)]+, and [Cu(OH)]+ on the kaolinite (001) surface was systematically studied through first-principles density functional calculations. The adsorption characteristics of different ions were evaluated by calculating the adsorption energy of the equilibrium adsorption configuration, state density, and electron density. The adsorption energy of [Zn(OH)]+, [Pb(OH)]+, and [Cu(OH)]+ were − 0.49, − 1.17, and − 1.64 eV, respectively. The simulation results indicated that new hybrid orbitals were formed between the metal ions and O atoms on the kaolinite surface, with electron transfer occurring the adsorption processes. The charge transfer direction for [Pb(OH)]+ was opposite those for [Zn(OH)]+ and [Cu(OH)]+. [Zn(OH)]+ was more likely to form polydentate complexes with hydroxyl groups on the kaolinite surface than [Cu(OH)]+ and [Pb(OH)]+. This work further elucidated the interaction mechanism between the adsorption systems and provided fundamental theoretical support for the structural modification and optimization of kaolinite, such as increasing the layer spacing of kaolinite and introducing other active groups on its surface to improve the adsorption capacity of heavy metal ions in water treatment and soil remediation.

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Adsorption behaviour of pollutants: Heavy metals, radionuclides, organic pollutants, on clays and their minerals (raw, modified and treated): A review

Cited by 94 publications

References 320 publications

Avermectin Toxicity to Benthic Invertebrates is Modified by Sediment Organic Carbon and Chemical Residence Time

Avermectin Toxicity to Benthic Invertebrates is Modified by Sediment Organic Carbon and Chemical Residence Time

High-Performance Material for the Effective Removal of Uranyl Ion from Solution: Computationally Supported Experimental Studies

Comparison of microscopic adsorption characteristics of Zn(II), Pb(II), and Cu(II) on kaolinite

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