سال انتشار: ۱۳۸۸

محل انتشار: اولین کنفرانس بین المللی تصفیه فاضلاب و بازیافت آب، فناوری ها و یافته های نو

تعداد صفحات: ۶

نویسنده(ها):

A Torabian – Mahab Ghodss Consulting Engineering Company, Tehran, Iran
A.H Hassani – Faculty of Environment, Azad University Research and Science Branch, Tehran, Iran
E Esmaeily – Faculty of Environment, Azad University Research and Science Branch, Tehran, Iran
L Syfy – Faculty of Environment, University of Tehran, Tehran, Iran

چکیده:

Developments in coating industry especially in tin coated plates and their abundant usage in food industries has resulted in the production of wastewaters with various ingredients which Phenol Sulfonic Acid (PSA) is among them. This compound is used as electrolyte in plating process and due to its acidic nature and phenolic ring is one of the aquatic environmental pollutants. In this research, for the treatment of PSA containing wastewaters through reverse osmosis (RO) process has been implemented and its removal efficiency is compared with other common methods (e.g., GAC adsorption, coagulation and flocculation) in Iran. In the RO process, two solutions containing 25 mg/lit and 200 mg/lit of PSA were tested and removal efficiencies in the column study reached to 100% and 99.9%, respectively. In coagulation and flocculation treatment method, Alum, Ferrous Sulfate and Ferric Chloride were used as coagulants and lime used as a coagulant aid. These coagulants in the optimum conditions showed that PSA removal efficiency was 36%, 43.4% and 32.7%, respectively. In the third part, PSA treatability by adsorption system using granular activated carbon (GAC) in different concentrations of PSA was determined. Studies showed the optimum concentration of activated carbon for the PSA treatment is 163 lit/Kg and the average removal efficiency of PSA was 90%. The results of this study demonstrate that RO process is an appropriate treatment alternative in industrial areas where the risk of PSA pollution of water bodies is probable.