Advanced porous adsorbents for radionuclides elimination

EnergyChem, Год журнала: 2023, Номер 5(4), С. 100101 - 100101

Опубликована: Фев. 14, 2023

Язык: Английский

---

A multiple Kirkendall strategy for converting nanosized zero-valent iron to highly active Fenton-like catalyst for organics degradation

Proceedings of the National Academy of Sciences, Год журнала: 2023, Номер 120(39)

Опубликована: Сен. 19, 2023

Nanosized zero-valent iron (nZVI) is a promising persulfate (PS) activator, however, its structurally dense oxide shell seriously inhibited electrons transfer for O-O bond cleavage of PS. Herein, we introduced sulfidation and phosphorus-doped biochar breaking the pristine with formation FeS FePO 4 -containing mixed shell. In this case, faster diffusion rate atoms compared to components triggered multiple Kirkendall effects, causing inward fluxion vacancies further coalescing into radial nanocracks. Exemplified by trichloroethylene (TCE) removal, such unique “lemon-slice-like” nanocrack structure favored fast outward ferrous ions across PS activation high-efficient generation utilization reactive species, as evidenced effective dechlorination (90.6%) mineralization (85.4%) TCE. O 2 • - contributed most TCE decomposition, moreover, SnZVI@PBC gradually became electron-deficient thus extracted from achieving nonradical-based degradation. Compared nZVI/PS process, SnZVI@PBC/PS system could significantly reduce catalyst dosage (87.5%) amount (68.8%) achieve nearly complete degradation, was anti-interference, stable, pH-universal. This study advanced mechanistic understandings effects-triggered on nZVI corresponding rational design Fenton-like catalysts organics

Язык: Английский

---

A comprehensive review on the novel approaches using nanomaterials for the remediation of soil and water pollution

Alexandria Engineering Journal, Год журнала: 2023, Номер 86, С. 373 - 385

Опубликована: Дек. 3, 2023

While urbanisation has numerous advantages, it causes greater risks to the environment and human health because of release heavy metals, various organic inorganic contaminants, personal care products, pharmaceuticals. Though several actions are being taken daily lessen harmful substances, there is still an immediate need find a suitable solution protect environment. Nanotechnology multifaceted applications, extensive evidence emerging applications nanoremediation, especially for soil water pollution. Iron nanoparticles showed outstanding removal efficiency towards hexavalent chromium (100 %). Likewise, publications on remediation employ nanomaterials based carbon, polymers. However, most previously conducted works present key nanoremediation results without depicting each nanomaterial's advantages disadvantages. Hence, this work critically reviews pros cons nanomaterial with special focus novel approaches using green synthesised that completely eco-friendly hence preferred contaminants producing effects. some bottlenecks exist in fully implementing Nanoremediation. Thus, review discusses limitations be addressed soon maintain environmental sustainability. Finally, presents opportunities future assessing eco-safety boosts further utilisation nanotechnology sustainable contaminated water.

Язык: Английский

---

Carbon nanotubes and graphene-based materials for adsorptive removal of metal ions – A review on surface functionalization and related adsorption mechanism

Applied Surface Science Advances, Год журнала: 2023, Номер 16, С. 100431 - 100431

Опубликована: Июнь 29, 2023

Enhanced use of heavy metals for commercial and non-commercial applications has resulted in industrial domestic discharge loaded with toxic metal ions creating increased environmental concern. Owing to the wide array that can be effectively removed, relatively low cost economical process conditions, removal by adsorption attracted scientific community over years. Search novel adsorbents which are cost-effective higher affinity reusability been an area active research. Carbon based adsorbents, offer enhanced surface area, volume ratio ease functionalization, have proven more effective than conventional both inorganic organic contaminants. Among various carbon nanotubes, graphene modified oxide composites gaining increasing importance as from waste waters. This paper presents a comprehensive review on these adsorptive metals. Optimal conditions maximum highlighted. Case studies approach functionalization mechanism ion functionalized discussed practical application.

Язык: Английский

---

Recent progress on plant extract-mediated biosynthesis of ZnO-based nanocatalysts for environmental remediation: Challenges and future outlooks

Advances in Colloid and Interface Science, Год журнала: 2023, Номер 317, С. 102931 - 102931

Опубликована: Май 25, 2023

Язык: Английский

---

Nanoremediation for heavy metal contamination: A review

Hybrid Advances, Год журнала: 2023, Номер 4, С. 100091 - 100091

Опубликована: Окт. 2, 2023

Pollution is a significant problem in both industrialized and developing countries, as well some developed countries. Heavy metal pollution poses crucial concern for communities due to its detrimental impact on human health the long-term well-being of planet. metals, such cadmium, chromium, arsenic, lead, mercury, do not degrade can enter food chain, leading risks. Therefore, it essential monitor take necessary steps eliminate heavy residues that may be present food, beverages, environment. Although exact role nanomaterials cleanup still unclear, nanotechnology holds promise future solution. In first part this comprehensive review, brief overview nanoremediation provided. The subsequent sections delve into various their potential applications different scenarios. Following that, critical analysis conducted nano-remediation methods, including oxidation, adsorption, chemical precipitation, filtration, ion exchange, coagulation-flocculation, photo-catalysis. Lastly, further suggestions are put forward regarding utilization more effective enduring cleanup, particularly eliminating metals.

Язык: Английский

---

COF-based membranes for liquid phase separation: Preparation, mechanism and perspective

Journal of Environmental Sciences, Год журнала: 2023, Номер 141, С. 63 - 89

Опубликована: Июль 12, 2023

Язык: Английский

---

Progresses in lignin, cellulose, starch, chitosan, chitin, alginate, and gum/carbon nanotube (nano)composites for environmental applications: A review

International Journal of Biological Macromolecules, Год журнала: 2023, Номер 241, С. 124472 - 124472

Опубликована: Апрель 17, 2023

Язык: Английский

---

Water purification advances with metal–organic framework-based materials for micro/nanoplastic removal

Separation and Purification Technology, Год журнала: 2024, Номер 343, С. 126987 - 126987

Опубликована: Март 6, 2024

Язык: Английский

---

Enrichment and Separation of Radionuclides by Organic Polymer Materials: A Review

ACS ES&T Engineering, Год журнала: 2024, Номер 4(2), С. 250 - 268

Опубликована: Янв. 23, 2024

Nuclear power provides a chance for the decarbonization of global energy-related emissions. However, spent fuel produced by nuclear reactors contains various radionuclides, which require further disposal and treatment. Therefore, enrichment separation radionuclides are great significance recycling utilization resources. Organic polymer materials have attracted attention due to their excellent physicochemical properties rapid kinetics, high adsorption capacity, selectivity, diverse functionalization. This review an overview use pristine polymers, functionalized polymer-based composites highly efficient different kinds (i.e., U, Tc, I). The synthesis strategy, ability, related mechanism comprehensively summarized. structure–property relationships in that underpin outstanding environmental remediation performance also illustrated. Finally, challenges perspectives future radionuclide legacy waste management reasonably proposed, aiming design functional polymers task-specific applications.

Язык: Английский

---