Removal of natural organic matter by ion exchange: Comparing regenerated and non-regenerated columns
نویسندگان
چکیده
Dissolved organic matter (DOM) in water has adverse impacts on the treatment process and is effectively removed by ion exchange (IEX). Some researchers have proposed term biological (BIEX) for of continuous DOM removal without need chemical regeneration that results brine waste. Surface with moderate dissolved carbon (DOC) concentrations (4–6 mg/L) high sulfate (80 – 120 was fed to two regenerated non-regenerated columns 12,500 bed volumes (9 months) goal investigating effects possibly long-term IEX operation. Chemically achieved between 60 80% DOC entirety experiment, while steady ~50%. Inorganic analysis showed activity had minimal impact removal, main mechanism secondary (SO42−) fractions affinities exchange. Fluorescence specific UV absorbance at 254 nm (SUVA 254) data higher SUVA values (terrestrial-like fractions) were better than those lower (aquatic/microbial-like fractions). Scanning electron microscopy biofilms resins covered 5–15% resin surface are composed numerous species bacteria varying functions, some protozoa present.
منابع مشابه
Removal of natural organic matter from aqueous solutions by electrocoagulation
Natural organic matter (NOM) affects some qualitative parameters of water such as color. In addition, it can deteriorate the performance of water treatment process including coagulation, adsorption, and membranes. NOM also reacts with chlorine in the chlorination process and may form disinfection by-products. The present study was carried out in laboratory-scale in a batch system using a cylind...
متن کاملNatural organic matter (NOM) and pesticides removal using a combination of ion exchange resin and powdered activated carbon (PAC).
The combination of anion exchange resins (AERs) and powdered activated carbon (PAC) was studied to remove both natural organic matter (NOM) and pesticides. Experiments were conducted with high dissolved organic carbon (DOC) surface water (about 6.0mg DOC/L) spiked with both atrazine and isoproturon. AERs, like MIEX and IRA938, showed up to 75% removal of DOC after 30min contact time. The additi...
متن کاملRemoval of natural organic matter by enhanced coagulation in Nicaragua
The existence of trihalomethanes (THMs) in a drinking water plant of Nicaragua has been investigated in order to see whether the concentration exceeded the maximum contaminant level recommended by the environmental protection agency of the United States (USEPA) and the Nicaragua guidelines. The influence of pH, temperature, chlorine dose and contact time on the formation of THMs were studied. T...
متن کاملNative and Regenerated Bovine Albumin
1. The effects of regeneration of whole bovine albumin on antigenic activity and serological specificity were determined by precipitin measurements on rabbit antisera to (1) native whole albumin, (2) albumin regenerated from 8 M urea, and (3) albumin regenerated from 8 M guanidine hydrochloride. 2. While numerically the mean antibody response to these three antigens was found to decrease in the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Water Research
سال: 2021
ISSN: ['0043-1354', '1879-2448']
DOI: https://doi.org/10.1016/j.watres.2020.116661