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[Removal of phthalate esters from drinking water using ozone-GAC process]
1Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China.
Huan Jing Ke Xue= Huanjing Kexue
|October 14, 2003
Summary
The ozone-granular activated carbon (GAC) process effectively removes phthalate esters like DMP, DEP, and DBP from drinking water. This combined method oxidizes and adsorbs these contaminants, ensuring safer water supplies.
Area of Science:
- Environmental Chemistry
- Water Treatment Technologies
- Adsorption Science
Context:
- Phthalate esters are common contaminants in drinking water sources.
- Conventional water treatment methods may not fully remove these endocrine-disrupting compounds.
- The need for effective and feasible treatment processes is critical for public health.
Purpose:
- To evaluate the efficacy of the ozone-granular activated carbon (GAC) process for removing phthalate esters from drinking water.
- To investigate the removal mechanisms of ozonation and GAC adsorption.
- To determine the adsorption characteristics of GAC for phthalate esters using isotherm studies.
Summary:
- A batch-scale study demonstrated that ozonation removed over 40% of dimethyl phthalate (DMP), diethyl phthalate (DEP), and dibutyl phthalate (DBP).
- Granular activated carbon (GAC) effectively adsorbed the remaining phthalate esters after ozonation, particularly within an Empty Bed Contact Time (EBCT) of 4 to 12 minutes.
- Freundlich adsorption isotherms successfully correlated GAC's removal of phthalate esters, enabling the estimation of GAC service time.
Impact:
- The ozone-GAC process is confirmed as a feasible and effective method for removing phthalate esters from drinking water.
- This study provides valuable data for optimizing water treatment strategies to mitigate phthalate ester contamination.
- Findings contribute to ensuring the safety and quality of potable water supplies.