Parametric studies on the performance of cation exchange for the ammonium removal |
| |
Authors: | Taekyung Yoon Byeongil Noh Byunghyun Moon |
| |
Affiliation: | (1) Department of Environmental Engineering, Dongeui University, 614-714 Pusan, Korea;(2) Department of Chemical Engineering, Dongseo University, 617-716 Pusan, Korea;(3) Department of Environmental Engineering, Changwon National University, 641-773 Kyungnam, Korea |
| |
Abstract: | Ion exchange performance to remove ammonium in drinking water was studied experimentally in batch and continuous operation
systems under the various conditions. Data were collected using commercially available strongacid cationexchange resins of
Na+ and H+ types. The performance was evaluated using equilibrium concentrations for the batch system or the effluent concentration
histories for the continuous column system as a function of time or the solution volume passed through the experimental column
until resins were exhausted. With high temperature or low initial feed concentration, ammonium removal characteristics of
the batch system increase. At the solution concentrations of 0.5, 1.0, and 2.0 mg/L of NH4+-N and the temperatures of 15,
25, and 35 ‡C, the selectivity coefficients of resin were determined between 1.38 and 1.43 for Na+ type resin, and 3.22 and
3.47 for H+ type resin. The selectivity coefficient was correlated as a function of temperature using Kraus-Raridon equation.
The breakthrough curves obtained from the continuous column operation give some results; i) with small column diameter or
large column height, ii) with low initial feed concentration, iii) with low volumetric flow rate, or iv) with high solution
temperature, the ammonium removal for the typical macroporous type resin increase. The results of this study could be scaled
up and used as a design tool for the waterpurification systems of the drinking water treatment processes.
This paper was presented at The 5th International Symposium on Separation Technology-Korea and Japan held at Seoul between
August 19 and 21, 1999. |
| |
Keywords: | Ion Exchange Denitrification Ammonium Removal Selectivity Coefficient |
本文献已被 SpringerLink 等数据库收录! |
|