Preparation, characterization, and application of activated carbon membrane with carbon whiskers

Bae, Sang-Dae; Lee, C.W.; Kang, Lim-Seok; Sakoda, Akiyoshi

doi:10.1016/j.desal.2005.12.061

Cited by 8 publications

(9 citation statements)

References 5 publications

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“…The length and diameter of carbon fibers were about 5-30 and 0.1-0.5 m, respectively. These observations were similar to other studies [4][5][6][7][8] using PVDC latex, ferric sulfate and methane as precursors for preparing the carbon whisker membranes. Fig.…”

Section: Microstructure Analysis Of Cca-tcmssupporting

confidence: 93%

“…of this study [3], composite membranes with activated carbon layers and carbon fibers (or whiskers) on ceramic substrates had been reported by Sakoda group [4][5][6][7][8]. They reported that the particles and/or biomaterials in the influent could be trapped by the carbon fibers layer of carbon whisker membranes yielding an increased permeate flux and improved cleaning processes for filtration and backflushing.…”

Section: Introductionmentioning

confidence: 77%

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Preparation of carbon fibers/carbon/alumina tubular composite membranes and their applications in treating Cu-CMP wastewater by a novel electrochemical process: Part 2

Yang

Tsai

2009

Journal of Membrane Science

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a b s t r a c tThis work (designated Part 2 of this study) aims to further discuss the present authors' research findings relevant to that of reported earlier (designated Part 1 of this study). In Parts 1 and 2 of this study, carbon fibers/carbon/alumina tubular composite membranes (CCA-TCMs) were first prepared through substrate formation, polyvinylidene chloride (PVDC) film wrapping, PVDC carbonization, catalyst precursor coating, and the chemical vapor deposition (CVD) process. The finished CCA-TCMs, with a pore size distribution ranging from 2 to 20 nm and a nominal pore size of ca. 3.5 nm, were further characterized by environmental scanning electron microscopy (ESEM), high-resolution transmission electron microscopy (HR-TEM), and permporometry. The so prepared CCA-TCMs were incorporated into a crossflow simultaneous electrocoagulation and electrocoagulation (EC/EF) treatment module to evaluate their capabilities in treating Cu-CMP (chemical mechanical polishing of the copper layer) wastewater obtained from a wafer fab. Crossflow EC/EF performance tests were carried out based on the Taguchi experimental design using the electric field strength, crossflow velocity, transmembrane pressure, and filtration area as the experimental factors. Under the optimal operating conditions, the EC/EF treatment module coupled with CCA-TCMs are capable of treating Cu-CMP wastewater to yield permeate with a turbidity of below 0.3 NTU. In the meantime, the removal efficiencies ranging from 82 to 91% for total solids (TS), total organic carbon (TOC), Cu, and Si could be obtained. By comparing the results of Part 1 and Part 2 of this study, the optimal operating conditions determined from the experimental designs based on the fractional factorial and Taguchi method yielded similar good qualities of permeate. A further evaluation of the technical significance of this study shows promising fundamental and practical results.

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Section: Microstructure Analysis Of Cca-tcmssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 77%

Preparation of carbon fibers/carbon/alumina tubular composite membranes and their applications in treating Cu-CMP wastewater by a novel electrochemical process: Part 2

Yang

Tsai

2009

Journal of Membrane Science

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“…The preparation processes of CCA-TCMs employed in this work were modified from the preceding reports [15,16]. Each carbon coated tubular Al 2 O 3 substrate, with two ends plugged by silicone stoppers, was spin-dipped (628.3188 × 10 −1 rad/s (600 rpm)) in 0.5 M ferric sulfate solution for 1 min, then air-dried at ambient temperature for 3 h. This procedure was repeated twice.…”

Section: Preparation Of Carbon Fibers/carbon/al 2 O 3 Tubular Composimentioning

confidence: 99%

“…Li et al [12,13] reported that the particles and/or biomaterials in the influent were trapped by the carbon fibers layer of carbon whiskers membranes yielding an increased permeate flux and improved cleaning processes for filtration and backflushing. Further, Bae et al [14][15][16] used a modified process to prepare the activated carbon membrane with carbon whisker that could effectively adsorb the dissolved organics and reduce the flux decline.…”

Section: Introductionmentioning

confidence: 98%

“…Of which, some investigators [8,10] have focused on developing CVD techniques using hydrocarbon precursors to coat carbon layers on the substrates and the characteristics of carbon layers such as the adsorption of dissolved organics, electrical conductivity and pore size reduction were discussed. Recently, composite membranes with activated carbon layers and carbon fibers (or whiskers) on ceramic substrates using the CVD process with hydrocarbon precursors and ultra-fine catalytic metal particles were developed by Sakoda and co-workers [12][13][14][15][16]. Li et al [12,13] reported that the particles and/or biomaterials in the influent were trapped by the carbon fibers layer of carbon whiskers membranes yielding an increased permeate flux and improved cleaning processes for filtration and backflushing.…”

Section: Introductionmentioning

confidence: 99%

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