Gas Hydrate-Based Heavy Metal Ion Removal from Industrial Wastewater: A Review

Nallakukkala, Sirisha; Rehman, Adeel Ur; Zaini, Dzulkarnain; Lal, Bhajan

doi:10.3390/w14071171

Cited by 25 publications

(6 citation statements)

References 168 publications

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“…This better fit to the pseudo-second order model suggests that this process is not solely dependent on physical forces (such as diffusion) but involves a significant contribution from chemical in-teractions between Sb and MIPs 46 . The results reveal that MIP-206-NH 2 demonstrated significantly higher capacity compared to other materials documented in the literature 47 – 49 . Moreover, MIP-206-NH 2 reached its maximum capacity in a notably shorter time compared to previously reported materials, underscoring the superior performance of MIP-206-NH 2 in Sb separation.…”

Section: Resultsmentioning

confidence: 69%

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

Bu,

Yang,

Zhang

et al. 2024

Sci Rep

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The present study investigates the efficacy of newly developed Zr-based metal–organic frameworks, specifically MIP-206, and its amine-modified counterpart, MIP-206-NH2, for the re-covery of antimony (Sb) from both synthetic and actual mining wastewater. Batch method studies were employed to examine the effect of waste media pH, Sb concentration, process kinetics, and the performance of the regeneration solution. MIP-206-NH2 exhibited impressive separation capabilities, achieving 102.18 mg/g and 63.23 mg/g for Sb (V) and Sb (III), respectively. In contrast, the pristine MIP-206 reached maximum values of 26.26 mg/g for Sb (V) and 16.95 mg/g for Sb (III). The separation process was well-described by the Langmuir equation, and the kinetics followed the pseudo-second-order model. Although the amine modification resulted in a decrease in the surface area of MIP-206 from 1345.21 to 1169.86 m2/g, SEM and XRD analyses confirmed that the structural integrity of MIP-206-NH2 remained unchanged. In terms of reusability, MIP-206-NH2 maintained up to 90% of its separation performance over 9 cycles, while MIP-206 demonstrated effectiveness for 7 cycles. The regeneration solution exhibited a capacity of approximately 0.63 mol/L for Sb (V) and 0.71 mol/L for Sb (III). Furthermore, MIP-206 and MIP-206-NH2 demonstrated successful application in selectively separating Sb from real mining wastewater.

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Section: Resultsmentioning

confidence: 69%

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

Bu,

Yang,

Zhang

et al. 2024

Sci Rep

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“…Seaweed is an important component of the marine ecosystem and comprises macroalgae (seaweed) and microalgae, which share common characteristics and photosynthetic capacity, but are different in size and morphology (NALLAKUKKALA et al, 2022). Seaweed grows in a wide variety of marine environments throughout the year and can achieve high growth without relying on arable land, chemicals, or fertilizers (MALAKA et al, 2020).…”

Section: Marine Biopolymer-based Bioplasticmentioning

confidence: 99%

From the plastics manufacturing process to the way to the oceans

Caldas,

Oliveira,

Santos

et al. 2023

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Plastics are by-products of origin from the petroleum industry, derived from oil and from the extraction of raw materials in the process of refining crude oil. In refineries, oil is fractionated into various types of organic materials, such as naphtha, gasoline, kerosene, and lubricating oils. From the naphtha that is extracted by cracking substances that give rise to conventional plastic. The last step to carry out the production of plastics is polymerization, where polymers arise, where each one differs from the other, arising from this whole process, thermoplastics, and thermosets. Therefore, it is possible to find plastics, ethylene, and propylene, such as polyethylene, polypropylene, polyvinyl chloride, epoxy resin, polyester, phenolic, silicones, and the most diverse types of plastics. Due to the extent and structure of polymers, they can be non-rigid plastics that can have different applicability. Thermosetting plastics, which do not melt by heating, are insoluble and non-recyclable and with differentiated use in various sectors. However, the widespread disorderly disposal of plastics has come to represent one of the biggest ecological problems in the pollution of marine environments, representing 80% of the garbage found in the oceans, being composed mainly of bags and bottles, among other contaminants. The outlook until 2040 shows that the volumes of plastic flowing into the sea could be tripled, with the expectation that it can present an annual quantity calculated between 23 and 37 million tons. Given this reality, studies focused on technologies capable of minimizing the impacts caused by these pollutants on environments have grown exponentially. Thus, the search for alternative measures for the reuse of plastics, being chemical, mechanical or energy recycling one of the solutions for the transformation of plastics, from the areas of biotechnology to civil construction, with the sole objective, to reduce the presence and damage caused by plastic. The highest concentration of garbage may be found in coastal regions and on the seabed. In this context, this review presents the problems of environmental pollution in the oceans caused by rigid plastics and non-rigid plastics, as well as studies directed at the displacement of plastics in the oceans and current technologies to remedy the problem.

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“…Heavy metals are highly toxic and stable in aquatic environments and do not degrade. They can build up in significant amounts in the human body once they reach the food chain and cause serious health issues when metals are consumed beyond the allowed concentration limit [ 13 , 14 , 15 ]. On the other hand, a recent report demonstrated that heavy metals contribute to the heterogeneity of water environments via metal–algae interaction.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Removal Performances of Heavy Metal Copper (II) Ions from Aqueous Solutions Using Hydrate-Based Method

Lan

Xie

et al. 2023

Molecules

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Since heavy metal ion-contaminated water pollutionis becoming a serious threat to human and aquatic lives, new methods for highly efficient removal of heavy metal ions from wastewater are important to tackle environmental problems and sustainable development. In this work, we investigate the removal performances of heavy metal copper (II) ions from aqueous solutions using a gas hydrate-based method. Efficient removal of heavy metal copper (II) ions from wastewater via a methane hydrate process was demonstrated. The influence of the temperature, hydration time, copper (II) ions concentration, and stirring rate on the removal of heavy metal copper (II) ions were evaluated. The results suggested that a maximum of 75.8% copper (II) ions were removed from aqueous solution and obtained melted water with 70.6% yield with a temperature of −2 °C, stirring speed 800 r/min, and hydration time of 4 h with aninitial copper concentration of 100 mg/L. The initial concentration of copper (II) ions in the aqueous solution could be increased to between 100 and 500 mg/L. Meanwhile, our study also indicated that 65.6% copper (II) ions were removed from aqueous solution and the yield of melted water with 56.7%, even with the initial copper concentration of 500 mg/L. This research work demonstrates great potential for general applicability to heavy metal ion-contaminated wastewater treatment and provides a reference for the application of the gas hydrate method in separation.

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Gas Hydrate-Based Heavy Metal Ion Removal from Industrial Wastewater: A Review

Cited by 25 publications

References 168 publications

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

Exploring the feasibility of Zr-based metal–organic frameworks for the recovery of Sb (V) and Sb (III) from mining waste

From the plastics manufacturing process to the way to the oceans

Investigation on the Removal Performances of Heavy Metal Copper (II) Ions from Aqueous Solutions Using Hydrate-Based Method

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