The Elimination of Toluenediamine from Aqueous Solution by Reverse Osmosis

Toluene diamine (TDA) is a main carcinogenic aromatic pollutant in some industrial wastewater. In this study, the reverse osmosis with DSS-HR۹۸PP as the membrane was employed for the removal of TDA in an aqueous environment. The Box–Behnken Design (BBD) of the experimentwas used to consider the effect of operational variables such as pressure, pH and the feed volumetric flow rate on the rejection efficiency of TDA. The ANOVA (Analysis of variance) exhibited a reasonable prediction second-order regression model and a high determination coefficient values (R۲ = ۹۹.۵۷, R۲adj = ۹۸.۸۱ and R۲pred = ۹۳.۲۰). The optimum conditions predicted by the model were as follows: the volumetric flow rate of feed at ۶ ´ ۱۰-۵ m۳/m۲s, pH at ۶.۸, and pressure at ۴۵ ´ ۱۰-۵ N/m۲. The predicted optimum response was ۹۸.۲%. The results showed that at the optimum conditions obtained for rejection, the permeate flux and actual rejection efficiency were ۴۴.۳ ´ ۱۰۴ m۳/m۲s, and ۹۶.۹%, respectively.

کلیدواژه ها:

Rejection efficiency ، Toluene diamine ، Reverse osmosis ، Box–Behnken design ، permeate flux