Removal of Trimethoprim,Sulfamethoxazole and Bisphenol-A by Nanofiltration and Adsorption Processes
Date Issued
2015
Date
2015
Author(s)
Tseng, Po-Chih
Abstract
In this study, NF membrane combine with activated carbon were used to removal of PPCP/EDCs in different sequence and assessed the removal efficiency. The target compounds were classified into three types: Type 1 was hydrophilic neutral compounds; Type 2 was negatively charged compounds; Type 3 was hydrophobic neutral compounds. In order to investigate the optimized operation conditions for integrated system. The discussions were started in per unit process: NF and AC. This study investigated the rejection of target compounds by NF under different operational conditions. The decrease of membrane pore radius significantly increased the rejection but decreased the solvent flux. Rejection slightly increased as the transmembrane pressure increased but for some compounds exhibit not regular change (increase or decrease the rejection). The rejection of target compounds slightly increased as cross-flow velocity increased. The zeta potential of activated carbon affected the adsorption capacity of target compounds by AC. At acid or base condition, the adsorption capacity of hydrophobic neutral compound did not change. The others types had great change of adsorption capacity. In order to combine with membrane process and real water body. This study controlled pH around 8 for elevation of removal efficiency. Different sequence of the combination of AC and NF has different removal efficiency. Both in batch and continuous operation experiments, NF combined with AC have great performance and have the higher rejection than only single process. According to the property of membrane for removal of target compounds, NF/AC were the better combination, the removal efficiency can reach more than 90 % for all compounds. This study investigated that NF combined with AC were effectively increased the removal of micro-pollutants.
Subjects
Nanofiltration
Activated Carbon
Pharmaceuticals and Personal Care Products
Endocrine Disrupting Chemicals
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-104-R02541122-1.pdf
Size
23.54 KB
Format
Adobe PDF
Checksum
(MD5):b467cb0fe2be8734151d2ce578327609