دانلود مقاله با موضوع حذف رنگ های آزوئیک از محلول های آبی توسط کیتوزان اولترافیلتراسیون پیشرفته
در قالب pdf و در 9 اسلاید،قابل ویرایش، شامل:
موضوع به انگلیسی:Removal of azoic dyes from aqueous solutions by chitosan
enhanced ultrafiltration
بخشی از متن:A cationic chelating polymer, namely biopolymer chitosan CHI with a molecular weight of 117 kDa is employed
in the present study to bring about the retention of azoic dyes from its aqueous solutions by way of polymer enhanced
ultrafiltration (PEUF). The effects of process parameters, namely, operating time, CHI and sodiumchloride
concentrations, transmembrane pressure, and pH of solution on the retention rate and permeate fluxwere examined.
CHI enhanced ultrafiltration achieved in the presence of CHI shows an increasing in the retention rate up to
86% for methyl orange (MO) and 89% for Direct Blue 71 (DB71). The retention rate of the studied azoic dyes decreaseswith
sodiumchloride concentration increasing. High retention percentage was also obtained at pH range
from 2 to 6. In addition, the permeate flux decreases when both, feed chitosan concentration and pH of solution
increase.
