Electrochemical carbon nanotube filters for water and wastewater treatment

Jame, Sadia Afrin; Zhou, Zhi

doi:10.1515/ntrev-2015-0056

Cited by 40 publications

(8 citation statements)

References 71 publications

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“…In comparison, the adsorption ratio was 20−60% for a granulated AC when treating 1−7 mg/L of wastewater with a linear velocity of 244.9−258.0 m/day (equal to 0.28−0.30 cm/ s). 25,26 Such an advantage was mainly located in the interconnected micropore−mesopore−macropore network of GCPs, which offers the feasibility of reversible adsorption and desorption with high throughput and with very few condensates. Considering that GCPs can be easily produced on a large scale and that wastewater with a much higher concentration of OC can be adsorbed with higher efficiency, 12 our results have paved the way for the practical application of GCPs in treating OC or OC-like organics at high concentrations to an ultra-low value for the application of the recycled water in industry.…”

Section: Resultsmentioning

confidence: 99%

High-Performance Graphene/Carbon Nanotube-Based Adsorbents for Treating Diluted o-Cresol in Water in a Pilot-Plant Scale Demo

Yin

Shen

Cui

et al. 2021

ACS Appl. Mater. Interfaces

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Graphene/carbon nanotube (CNT)-based adsorbents were fabricated on a kilogram scale by extrusion processing (where graphene is used as the major adsorption material and CNTs make up the backbone to enhance the mechanical strength) and then mixed and bonded with poly(tetrafluoroethylene). Kilogram-scale adsorbents were used to treat the content of o-cresol in wastewater to be <1.12 mg/kg in a continuous and reversible adsorption−desorption apparatus, which could last for 99 h with a space velocity of 30 h −1 and a total wastewater capacity of 5 tons per day. Brunauer−Emmett−Teller (BET), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), and Raman spectroscopy all suggested that the surface properties and pore structure of the spent adsorbents remain unchanged after recycling at both low-temperature adsorption and high-temperature desorption in vacuum. These results provided an effective reversible adsorbent system for removing aromatic organics and prompted the scaled-up applications of carbon nanomaterials in the treatment of wastewater.

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Section: Resultsmentioning

confidence: 99%

High-Performance Graphene/Carbon Nanotube-Based Adsorbents for Treating Diluted o-Cresol in Water in a Pilot-Plant Scale Demo

Yin

Shen

Cui

et al. 2021

ACS Appl. Mater. Interfaces

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“…For water desalination and purification applications, CNTs can be fabricated into standalone membranes or incorporated with other materials in many formats. An investigation of a highly stable and electrochemically active membrane made solely of CNTs, which could find significant applications in chemical and biological wastewater treatment, was undertaken by Sadia et al [119]. Such CNTs membrane maintained a phenol removal rate over 85% for 4 h with an average oxidation rate of ~0.059 mol h −1 m −2 when operated with H 2 O 2 .…”

Section: Reverse Osmosis and Nanofiltration Membranesmentioning

confidence: 99%

A Review on Reverse Osmosis and Nanofiltration Membranes for Water Purification

et al. 2019

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Sustainable and affordable supply of clean, safe, and adequate water is one of the most challenging issues facing the world. Membrane separation technology is one of the most cost-effective and widely applied technologies for water purification. Polymeric membranes such as cellulose-based (CA) membranes and thin-film composite (TFC) membranes have dominated the industry since 1980. Although further development of polymeric membranes for better performance is laborious, the research findings and sustained progress in inorganic membrane development have grown fast and solve some remaining problems. In addition to conventional ceramic metal oxide membranes, membranes prepared by graphene oxide (GO), carbon nanotubes (CNTs), and mixed matrix materials (MMMs) have attracted enormous attention due to their desirable properties such as tunable pore structure, excellent chemical, mechanical, and thermal tolerance, good salt rejection and/or high water permeability. This review provides insight into synthesis approaches and structural properties of recent reverse osmosis (RO) and nanofiltration (NF) membranes which are used to retain dissolved species such as heavy metals, electrolytes, and inorganic salts in various aqueous solutions. A specific focus has been placed on introducing and comparing water purification performance of different classes of polymeric and ceramic membranes in related water treatment industries. Furthermore, the development challenges and research opportunities of organic and inorganic membranes are discussed and the further perspectives are analyzed.

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“…The most prominent application of CNTs in environmental remediation includes the removal of organic contaminants through membrane filtration due to the high stability and large specific surface area of CNTs (Jame & Zhou, 2016). An electrochemically activated CNT filter was able to generate .…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Nanomaterials for sustainable remediation of chemical contaminants in water and soil

Mukhopadhyay

Sarkar

Khan

et al. 2021

Critical Reviews in Environmental Science and Technology

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Rapid growth in population, industry, urbanization and intensive agriculture have led to soil and water pollution by various contaminants. Nanoremediation has become one of the most successful emerging technologies for cleaning up soil and water contaminants due to the high reactivity of nanomaterials (NMs). Numerous publications are available on the use of NMs for removing contaminants, and the efficiencies are often improved by modifications of NMs with polymers, clay minerals, zeolites, activated carbon, and biochar. This paper critically reviews the current state-of-the-art NMs used for sustainable soil and water remediation, focusing on their applications in novel remedial approaches, such as adsorption/filtration, catalysis, photodegradation, electro-nanoremediation, and nano-bioremediation. Insights into process performances, modes of deployment, potential environmental risks and their management, and the consequent societal and economic implications of using NMs for soil and water remediation indicate that widespread acceptance of nanoremediation technologies requires not only a substantial advancement of the underpinning science and engineering aspects themselves, but also practical demonstrations of the effectiveness of already recognized approaches at real world in-situ conditions. New research involving green nanotechnology, nano-bioremediation, electronanoremediation, risk assessment of NMs, and outreach activities are needed to achieve successful applications of nanoremediation at regional and global scales.

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Electrochemical carbon nanotube filters for water and wastewater treatment

Cited by 40 publications

References 71 publications

High-Performance Graphene/Carbon Nanotube-Based Adsorbents for Treating Diluted o-Cresol in Water in a Pilot-Plant Scale Demo

High-Performance Graphene/Carbon Nanotube-Based Adsorbents for Treating Diluted o-Cresol in Water in a Pilot-Plant Scale Demo

A Review on Reverse Osmosis and Nanofiltration Membranes for Water Purification

Nanomaterials for sustainable remediation of chemical contaminants in water and soil

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