Polypyrrole-Coated Granules for Humic Acid Removal

Bai, Renbi; Zhang, X.

doi:10.1006/jcis.2001.7843

Cited by 101 publications

(83 citation statements)

References 35 publications

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“…Firstly, the isoelectric points (iep) are generally found either at very high or low pH 38,39,40,41,42 . This means that the zeta potential, either positive or negative, remains reasonably constant over a large pH range and then abruptly changes at the iep.…”

Section: Surface Energy and Zeta Potentialmentioning

confidence: 99%

Surface and Biomolecular Forces of Conducting Polymers

Higgins

Wallace

2013

Polymer Reviews

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In this review, we provide insight into the surface forces of conducting polymers, a class of intelligent materials that offer unique strategies for controlling biomolecular interactions in wide-ranging biomedical applications. Critical to the success of these applications is that the polymer interface is exposed to biological fluids whose interactions are controlled through the polymer surface chemistry and electrochemical switching of the surface properties. There is, however, little known about the intermolecular and surface forces that govern these interactions. Therefore, the purpose of this review is to more closely examine the forces that mediate interactions with biological entities, including forces such as van der Waals, electrostatic, hydrophobic, and hydrogen bonding. We introduce relevant surface properties such as surface energy and surface potential, and demonstrate how they manifest as forces. In particular, we highlight the emerging use of Atomic Force Microscopy for directly measuring these forces at the single molecule level; a unique capability that is enabling deconvolution of complex biomolecular interactions with conducting polymers. Finally, we provide an overview of biomolecular interactions, namely model proteins and DNA, and conclude by discussing a growing area of interest; the spatio-temporal and reversible control of biomolecular forces via electrical stimulation. AbstractIn this review, we provide insight into the surface forces of conducting polymers, a class of

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Section: Surface Energy and Zeta Potentialmentioning

confidence: 99%

Surface and Biomolecular Forces of Conducting Polymers

Higgins

Wallace

2013

Polymer Reviews

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“…HS are commonly existed in natural waters in the range of a few mg/L to a few hundred mg/L C (Wall and Choppin, 2003). However, the presence of HS could cause various environmental and health problems including the followings: (1) HS could cause undesirable color and taste, which are also served as food for bacterial growth in water (Bai and Zhang, 2001); (2) HS could bind with heavy metals and biocides, yielding high concentration of these substances and enhancing their transport in water (Schmitt et al, 2003); (3) HS could react with chlorine during water treatment to form disinfection by-products, such as trihalomethane (Tian et al, 2013); (4) HS have been shown to compete with low MW synthetic organic chemicals and inorganic pollutants, reducing their adsorption rates and equilibrium capacities (Tratnyek et al, 2001;Klausen et al, 2003); (5) HS could act as a major foulant causing serious microfiltration (MF)/ultrafiltration (UF) membrane fouling during filtration Zydney, 1999, 2000). As such, the removal of HS has been widely investigated to minimize their impact on environmental and human health.…”

Section: Introductionmentioning

confidence: 99%

Modification of ultrafiltration membrane with nanoscale zerovalent iron layers for humic acid fouling reduction

Jefferson

et al. 2015

Water Research

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“…S5) indicated that the amount of HA molecules adsorbed on TiO 2 and Al 2 O 3 particles decreased with increasing pH values. The nature of TiO 2 particles was affected by pH condition [26][27][28][29]: the surface was positively charged in acid condition but negatively charged in basic condition. The positive charged TiO 2 surface hydroxyls were mainly TiOH 2 + and negative charged TiO 2 surface hydroxyls were TiO − in acidic and basic solution respectively [30].…”

Section: Effects Of Solution Ph On the Adsorption Process Of Hamentioning

confidence: 99%