How to Build a Microplastics‐Free Environment: Strategies for Microplastics Degradation and Plastics Recycling

Advanced Science, Год журнала: 2022, Номер 9(6)

Опубликована: Янв. 6, 2022

Microplastics are an emergent yet critical issue for the environment because of high degradation resistance and bioaccumulation. Unfortunately, current technologies to remove, recycle, or degrade microplastics insufficient complete elimination. In addition, fragmentation mismanaged plastic wastes in have recently been identified as a significant source microplastics. Thus, developments effective removal methods, well as, plastics recycling strategies crucial build microplastics-free environment. Herein, this review comprehensively summarizes eliminating from highlights two key aspects achieve goal: 1) Catalytic into environmentally friendly organics (carbon dioxide water); 2) catalytic upcycling monomers, fuels, valorized chemicals. The mechanisms, catalysts, feasibility, challenges these methods also discussed. Novel such photocatalysis, advanced oxidation process, biotechnology promising eco-friendly candidates transform benign valuable products. future, more effort is encouraged develop conversion products with efficiency, product selectivity, low cost under mild conditions.

Язык: Английский

---

A comprehensive review on reactive oxygen species (ROS) in advanced oxidation processes (AOPs)

Chemosphere, Год журнала: 2022, Номер 308, С. 136205 - 136205

Опубликована: Авг. 29, 2022

Язык: Английский

---

Accelerated Fe²⁺ Regeneration in an Effective Electro-Fenton Process by Boosting Internal Electron Transfer to a Nitrogen-Conjugated Fe(III) Complex

Environmental Science & Technology, Год журнала: 2021, Номер 55(9), С. 6042 - 6051

Опубликована: Фев. 22, 2021

The regeneration rate of Fe2+ from Fe3+ dictates the performance electro-Fenton (EF) process, represented by amount produced hydroxyl radicals (·OH). Current strategies for acceleration normally require additional chemical reagents, to vary redox potential Fe2+/Fe3+. Here, we report an attempt at using intrinsic property electrode our advantage, i.e., nitrogen-doped carbon aerogel (NDCA), as a reducing agent without foreign reagents. Moreover, pyrrolic N in NDCA provides unpaired electrons through framework reduce Fe3+, while graphitic and pyridinic coordinate with form C–O–Fe–N2 bond, facilitating electron transfer both external circuit Fe3+. Our Fe2+/NDCA-EF system exhibits 5.8 ± 0.3 times higher performance, terms generated ·OH, than traditional Fenton same concentration. In subsequent reaction, demonstrates 100.0% removal dimethyl phthalate, 3-chlorophenol, bisphenol A, sulfamethoxazole low specific energy consumption 0.17–0.36 kW·h·g–1. Furthermore, 90.1 0.6% dissolved organic 83.3 0.9% NH3-N are achieved treatment domestic sewage. purpose this work is present novel strategy EF process also elucidate role different species carbonaceous contributing cycle

Язык: Английский

---

Fe-N-C catalyst with Fe-NX sites anchored nano carboncubes derived from Fe-Zn-MOFs activate peroxymonosulfate for high-effective degradation of ciprofloxacin: Thermal activation and catalytic mechanism

Journal of Hazardous Materials, Год журнала: 2021, Номер 424, С. 127380 - 127380

Опубликована: Сен. 30, 2021

Язык: Английский

---

Tetracycline degradation by peroxymonosulfate activated with CoNx active sites: Performance and activation mechanism

Chemical Engineering Journal, Год журнала: 2021, Номер 431, С. 133477 - 133477

Опубликована: Ноя. 9, 2021

Язык: Английский

---

High H2O2 selectivity and enhanced Fe2+ regeneration toward an effective electro-Fenton process based on a self-doped porous biochar cathode

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 315, С. 121523 - 121523

Опубликована: Май 18, 2022

Язык: Английский

---

Recent advances in the applications of encapsulated transition-metal nanoparticles in advanced oxidation processes for degradation of organic pollutants: A critical review

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 342, С. 123401 - 123401

Опубликована: Окт. 18, 2023

Язык: Английский

---

Enhanced Chlorinated Pollutant Degradation by the Synergistic Effect between Dechlorination and Hydroxyl Radical Oxidation on a Bimetallic Single-Atom Catalyst

Environmental Science & Technology, Год журнала: 2021, Номер 55(20), С. 14194 - 14203

Опубликована: Окт. 7, 2021

Chlorinated organic pollutants are highly toxic and widespread in the environment, which cause ecological risk threaten human health. difficult to degrade mineralize by conventional advanced oxidation process as C–Cl bond is resistant reactive oxygen species oxidation. Herein, we designed a bifunctional Fe/Cu bimetallic single-atom catalyst anchored on N-doped porous carbon (FeCuSA-NPC) for electro-Fenton process, chlorinated dechlorinated Cu subsequently oxidized ·OH radical produced from O2 conversion Fe. Benefitting synergistic effect between dechlorination Fe, can be efficiently degraded mineralized. The mass activity pollutant degradation FeCuSA-NPC 545.1–1374 min–1 gmetal–1, excessing highest value of reported electrocatalyst. Moreover, demonstrated pH-universal, long-term stable, environment friendly. This work provides new insight into rational design electrocatalyst efficient removal pollutants.

Язык: Английский

---

Iron-based materials for simultaneous removal of heavy metal(loid)s and emerging organic contaminants from the aquatic environment: Recent advances and perspectives

Environmental Pollution, Год журнала: 2022, Номер 299, С. 118871 - 118871

Опубликована: Янв. 20, 2022

Язык: Английский

---

Highly Efficient Hydroxyl Radicals Production Boosted by the Atomically Dispersed Fe and Co Sites for Heterogeneous Electro-Fenton Oxidation

Environmental Science & Technology, Год журнала: 2023, Номер 57(7), С. 2907 - 2917

Опубликована: Фев. 7, 2023

The heterogeneous electro-Fenton (hetero-e-Fenton)-coupled electrocatalytic oxygen reduction reaction (ORR) is regarded as a promising strategy for ·OH production by simultaneously driving two-electron ORR toward H2O2 and stepped activating the as-generated to ·OH. However, high-efficiency electrogeneration of remains challengeable, it difficult synchronously obtain efficient catalysis both steps above on one catalytic site. In this work, we propose dual-atomic-site catalyst (CoFe DAC) cooperatively catalyze electrogeneration, where atomically dispersed Co sites are assigned enhance O2 intermediates Fe responsible activation CoFe DAC delivers higher rate 2.4 mmol L-1 min-1 gcat-1 than single-site Co-NC (0.8 gcat-1) Fe-NC (1.0 gcat-1). Significantly, hetero-e-Fenton process demonstrated be more energy-efficient actual coking wastewater treatment with an energy consumption 19.0 kWh kg-1 COD-1 other electrochemical technologies that reported values 29.7∼68.0 kW h COD-1. This study shows attractive advantages efficiency sustainability which should have fresh inspiration development new-generation technology.

Язык: Английский

---