Flotability and flotation separation of polymer materials modulated by wetting agents.
Waste Manag
; 34(2): 309-15, 2014 Feb.
Article
em En
| MEDLINE
| ID: mdl-24355830
ABSTRACT
The surface free energy, surface tension and contact angles were performed to investigate the properties of wetting agents. Adsorption of wetting agents changes wetting behavior of polymer resins. Flotability of polymer materials modulated by wetting agents was studied, and wetting agents change significantly flotability of polymer materials. The flotability decreases with increasing the concentration of wetting agents, and the wetting ability is lignin sulfonate (LS)>tannic acid (TA)>methylcellulose (MC)>triton X-100 (TX-100) (from strong to weak). There is significant difference in the flotability between polymer resins and plastics due to the presence of additives in the plastics. Flotation separation of two-component and multicomponent plastics was conducted based on the flotability modulated by wetting agents. The two-component mixtures can be efficiently separated using proper wetting agent through simple flotation flowsheet. The multicomponent plastic mixtures can be separated efficiently through multi-stage flotation using TA and LS as wetting agents, and the purity of separated component was above 94%, and the recovery was more than 93%.
Palavras-chave
ABS; ABS plastic obtained from air conditioning shell; ABS plastic obtained from television chassis; ABS-air; ABS-tv; Adsorption; Flotability; LS; MC; PC; PC plastic obtained from compact disc; PC plastic obtained from travel cup; PC-cd; PC-cup; PE; PET; PET plastic obtained from drink bottle; PET-dri; PP; PS; PS plastic obtained from car lampshade; PS plastic obtained from cosmetic box; PS-fac; PS-lam; PTFE; PVC; PVC plastic obtained from decorative buckle; PVC plastic obtained from package; PVC plastic obtained from pipe; PVC plastic obtained from rain boot; PVC plastic obtained from water hose; PVC-dec; PVC-hos; PVC-pac; PVC-pip; PVC-sho; Plastics flotation; Plastics recycling; TA; TP; TX-100; WED; WFD; WGD; Wetting agents; acrylonitrile-butadiene-styrene; lignin sulfonate; liquid group of distilled water, ethylene glycol and diiodomethane; liquid group of distilled water, formamide and diiodomethane; liquid group of distilled water, glycerol and diiodomethane; methylcellulose; polycarbonate; polyethylene; polyethylene terephthalate; polypropylene; polystyrene; polytetrafluoroethylene; polyvinyl chloride; tannic acid; terpineol; triton X-100
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Polímeros
/
Resíduos
/
Agentes Molhantes
/
Teste de Materiais
/
Eliminação de Resíduos
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article