Effects of Surface-Modified Nano-Scale Carbon Black on Cu and Zn Fractionations in Contaminated Soil

2013 ◽  
Vol 16 (1) ◽  
pp. 86-94 ◽  
Author(s):  
Jie-min Cheng ◽  
Yu-zhen Liu ◽  
Han-wei Wang
Keyword(s):  
Carbon Black ◽  
Contaminated Soil ◽  
Nano Scale ◽  
Surface Modified ◽  
Cu And Zn

scholarly journals Effects of Nanoscale Carbon Black Modified by HNO3on Immobilization and Phytoavailability of Ni in Contaminated Soil

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Jiemin Cheng ◽  
Lei Yu ◽  
Tong Li ◽  
Yuzhen Liu ◽  
Chengxiu Lu ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Carbon Black ◽  
Contaminated Soil ◽  
In Situ Immobilization ◽  
Alkali Soils ◽  
Greenhouse Cultivation ◽  
Surface Modified ◽  
Zeta Potential Analysis ◽  
Cultivation Experiment

A surface-modified nanoscale carbon black (MCB) as Ni adsorbent in contaminated soil was prepared by oxidizing the carbon black with 65% HNO3. The surface properties of the adsorbent were characterized by zeta potential analysis, scanning electron microscopy (SEM), and Fourier transform infrared spectroscopy (FTIRs). Batch experiments were conducted to evaluate the improvement of Ni2+adsorption by MCB. Greenhouse cultivation experiments were conducted to examine the effect of MCB on the DTPA-extractable Ni2+in soil, Ni2+uptake of ryegrass shoot, and growth of ryegrass. Results indicated that MCB had much lower negative zeta potential, more functional groups for exchange and complexation of cation, and more heterogeneous pores and cavities for the adsorption of cation than the unmodified parent one (CB). MCB showed enhanced sorption capacity for Ni (qmax, 49.02 mg·g−1) compared with CB (qmax, 39.22 mg·g−1). Greenhouse cultivation experiment results showed that the biomass of ryegrass shoot and the Ni uptake of the ryegrass shoot were significantly increased and the concentrations of DTPA-extractable Ni in soil were significantly decreased with the increasing of MCB amount. It is clear from this work that the MCB had good adsorption properties for the Ni and could be applied in the in situ immobilization and remediation of heavy metal contaminated saline-alkali soils.

scholarly journals Properties of Conductive Polyacrylonitrile Fibers Prepared by Using Benzoxazine Modified Carbon Black

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 179 ◽  
Author(s):  
Damiro Ahn ◽  
Hyun-Jung Choi ◽  
Ho-dong Kim ◽  
Sang Young Yeo
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
Photoelectron Spectroscopy ◽  
Weight Ratio ◽  
Pan Fiber ◽  
Potential Applications ◽  
Conductive Fillers ◽  
Conductive Fibers ◽  
Surface Modified ◽  
Pan Fibers

Composites of carbon black (CB) and polymers are attractive for producing conductive fibers. Herein, to achieve improved interactions with polymers, the surface of CB was modified to form 4-aminobenzoyl-functionalized carbon black (ABCB), benzoxazine-functionalized carbon black (BZCB), and Ag-anchored carbon black (Ag-ABCB). The surface-modified CBs were characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis, and X-ray photoelectron spectroscopy was utilized to confirm the presence of Ag in Ag-ABCB. Conductive polyacrylonitrile (PAN) fibers were wet-spun with conductive fillers (CB, ABCB, Ag-ABCB, and BZCB) to investigate the effects of various functional groups on the electrical and mechanical properties. After annealing the conductive PAN fibers, the conductivity and tensile strength greatly increased, whereas the diameter decreased. Notably, the fiber with a BZCB/PAN weight ratio of 12/88 possessed a conductivity of 8.9 × 10−4 S/cm, and strength of 110.4 MPa, and thus the highest conductivity and best mechanical properties in the conductive PAN fiber. These results indicate that the annealed BZCB/PAN fibers have potential applications in the manufacturing of antistatic fabrics.

Surface Modified Boehmite Aluminas: A Versatile Approach to Nano-scale Particle Dispersion and Nanocomposites

2005 ◽  
Vol 879 ◽  
Author(s):  
Steven L. Baxter
Keyword(s):  
Particle Size ◽  
Physical Property ◽  
Particle Dispersion ◽  
Aqueous Systems ◽  
Nano Scale ◽  
Organic Matrices ◽  
Crystallite Sizes ◽  
Scale Particle ◽  
Physical Property Data ◽  
Surface Modified

AbstractCertain forms of monohydrate aluminum oxide, commonly known as boehmite or pseudoboehmite alumina, are known to disperse in water at low pH to nano-scale dimensions. The upsurge of interest in nano-scale structures has prompted our study of the surface modification of nano-scale boehmite aluminas with organic acids in order to achieve dispersion of these materials in non-aqueous systems and alkaline aqueous systems.This paper discusses the variety of modifiers used to achieve compatibilization and dispersion of nano-sized particles of these boehmite aluminas in aqueous and organic matrices. Organic modification of a variety of crystallite sizes (5-60 nm) and shapes (plates, needles, blocks) has been achieved, including materials of high aspect ratio. We describe the properties of these dispersions, including primary particle size, dispersed particle size, and surface charge. Finally, we present physical property data of polymer nanocomposites prepared from these materials. These materials are based on a commercial process which has been in operation for over 40 years and which has global production capacities of 70,000 tons per annum.

CO 2 sorption on surface-modified carbonaceous support: Probing the influence of the carbon black microporosity and surface polarity

2016 ◽  
Vol 360 ◽  
pp. 329-337 ◽  
Author(s):  
Valentina Gargiulo ◽  
Michela Alfè ◽  
Paola Ammendola ◽  
Federica Raganati ◽  
Riccardo Chirone
Keyword(s):  
Carbon Black ◽  
Surface Polarity ◽  
Surface Modified

Surface-modified carbon black for As(V) removal

2008 ◽  
Vol 319 (1) ◽  
pp. 53-62 ◽  
Author(s):  
Dipu Borah ◽  
Shigeo Satokawa ◽  
Shigeru Kato ◽  
Toshinori Kojima
Keyword(s):  
Carbon Black ◽  
Surface Modified

scholarly journals Experimental Study on the Piezoresistivity of Concrete Containing Steel Fibers, Carbon Black, and Graphene

2021 ◽  
Vol 8 ◽  
Author(s):  
Shijun Wang ◽  
Amardeep Singh ◽  
Qiong Liu
Keyword(s):  
Carbon Black ◽  
Coupling Effect ◽  
Peak Load ◽  
Steel Fibers ◽  
Conductive Materials ◽  
Multi Scale ◽  
Nano Scale ◽  
Pressure Sensitive ◽  
Macro Scale ◽  
Contrast Group

Adding conductive materials to cement-based composites can lead to pressure-sensitive properties. In this study, different scales of conductive materials were incorporated, including macro-scale steel fibers, micro-scale carbon black powder, and nano-scale graphene. The coupling effect of three scales of materials ensured that the intelligent concrete had improved strength, lower cost, and comparable pressure-sensitive performance. The results show that the strength of intelligent concrete with multi-scale conductive materials is higher than that of the contrast group of ordinary concrete and intelligent concrete when adding nano-scale graphene alone. Especially, the addition of steel fibers significantly improved the crack resistance of the intelligent concrete. In the elastic stage, the resistivity of intelligent concrete of multi-scale conductive materials decreases with the increase in compression, and the decrease range of resistivity is approximately proportional to the external force. After reaching the peak load, the resistivity of the intelligent concrete gradually increases and can illustrate the damage evolution. This study lays a foundation for the application of intelligent concrete in deformation and damage monitoring.

Measurement of Dispersion Stability of Surface-Modified Nanosized Carbon Black in Various Liquids

2007 ◽  
Vol 7 (11) ◽  
pp. 3827-3829 ◽  
Author(s):  
Heang Sin Jang ◽  
Dong-Wha Park ◽  
Sang Eun Shim
Keyword(s):  
Carbon Black ◽  
Colloidal Stability ◽  
Dispersion Stability ◽  
Scattering Method ◽  
Long Term Stability ◽  
Dispersion Agent ◽  
Surface Modified ◽  
Multiple Light Scattering ◽  
Effect Of Surface

The dispersion stability of nano-sized carbon black produced by a thermal plasma process was investigated using a novel multiple light scattering method. The effect of surface modification of carbon black on the dispersion stability was monitored in various polar and non-polar liquids including water, methanol, styrene, and toluene. The results show that carbon black functionalized with carboxylic anion groups has much improved colloidal stability in a polar solvent and the degree of dispersion stability is strongly related to the solubility parameter value of liquids. In addition, the carbon black with carboxylic anions has a long-term stability without any auxiliary dispersion agent such as a surfactant due to electrostatic repulsion.

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