Adsorption of Low-Concentration Formaldehyde from Air by Silver and Copper Nano-Particles Attached on Bamboo-Based Activated Carbon

Abstract

Abstract-Bamboo based activated carbon (AC) was modified by attaching silver (AC-Ag) and copper (AC-Cu) nano-particles to reduce the low-concentration of formaldehyde in air. Batch isotherm tests were performed to determine the adsorption capacity of each activated carbon. At equilibrium concentration of 8 ppm, AC-Cu adsorbed 29% higher amount of formaldehyde as compared to the original AC. The highest loading amount was obtained for AC-Ag, being around 0.425 mg/g AC-Ag. The concentration of formaldehyde removed by the AC-Ag was 1.6 times higher than the virgin AC at the same equilibrium concentration.Index Terms-Formaldehyde, activated carbon, bamboo, silver nano-particles.

Capture of formaldehyde by adsorption on nanoporous materials

“…Nevertheless, the chemical properties of the adsorbent surface are the most important parameters. The presence of functional groups such as hydroxyl groups, nitrogen oxides, pyridonic and pyridinic structures as well as aluminum-, silver-or copper coordinated metallic centers, enhances the adsorption affinity of the material for formaldehyde [11][12][13][14]. In addition, some experiences performed on activated carbons containing surface amino groups indicate that chemisorption of formaldehyde occurs on the surface [15].…”

Adsorptive Removal of Formaldehyde by Chemically Bamboo Activated Carbon with addition of Ag nanoparticle: Equilibrium and Kinetic

“…The AC had conducted as Rengga's method [7]. The Bamboo Chars and KOH were mixed with 1:3 of weight ratio.…”

“…Silver nanoparticle synthesized was conducted with reduction process similar to Gaedhi's method [8] in the previous paper [7]. As much 4 mL of 0.1 M AgNO 3 added to 1 L of an aqueous solution with 0.15 wt% of the soluble starch.…”

“…An interesting fact was that the Ag nanoparticles dispersed on commercial coal-based AC to effectively remove formaldehyde from air [6]. Silver also possesses high applicability for use in controlling indoor air due to its non-toxic feature [7].…”

Properties of High Density Fiberboard Mixed with Poplar Bark

“…Formaldehyde has been found to be a source of indoor air pollution, and over 500 other VOC has been detected over the last decades [1,2]. The binding of formaldehyde has been attempted using many different methods, and bark absorbing ability has also been also tested [2][3][4][5][6][7][8][9][10][11][12][13]. Bark components are very similar to wood components, but several other types of materials can be observed in bark in different proportions, such as waxes, terpenes, flavonoids, alkaloids, suberin, condensed tannins, etc.…”