Degradation of C6H5Cl and with Microwave-Induced Photosensitizers and Electron Donors

• Main Authors: Wen-Jen Horng, 洪聞見
• Other Authors: Chih-Ju G. Jou
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/97014815203737483722

碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程研究所 === 101 === This study aimed to investigate the dechlorination reaction of chlorinated organic solution in the situation that using PS, under the condition of providing the presence of electron donor agents, stimulated its electron by microwave, through electron translat-ing reaction mechanism. With 50w microwave radia ting for 300 seconds, add 1mM concentration of phenel red (PS) into 100 mg/L chlorobenzene solution. The result showed the removal rate is 29.1%. On the same condition, add another 2mM concentra-tion of trimethylamine(electron donor agents), and the removal rate could increase to 34.1%. On the other hand, process the experiments by adding different concentrations of phenel red into chlorobenzene solution with 2mM trimethylamine. The result showed the concen tration of phenel red phthalein decreased from 1mM to 0.2mM resulted the removal rate of chlorobenzene increased from 34.1% to 40%. Under the same condition, experimented with 100mg/L tetrachloroethylene,and the result showed the removal rate increased from 44.7% to 46.2%. With the concentration of phenel red decreasing,the removal rate of dechlorination reaction increased. This is be-cause after PS absorbed the energy from microwave,the electron translated rapid-ly,obtaining more energy, offering higher dissociation energy, and increasing its remov-al rate. If limiting the concentration of phenel red to 1mM,add different concentrations of trimethylamine,and the result showed its concentration decreased from 2mM to 0.5mM. The removal rate decreased from 34.1% to 30.2%. With the concentration of trimethylamine decreasing, the re-moval rate of dechlorination reaction decreased. This iii is because the translating reaction of electron donor agent to PS decreased, so did the removal rate. And, with the best phenel red 0.2mM mixed with trimethylamine 2mM, increasing microwave energy from 30w to 50w, the removal rate of dechlorination reaction in-creased from 23.0% to 40.0%. On the same condition, the removal rate of tetrachloro-ethylene increased from 36.5% to 46.2%. It’s because increasing efficiency and energy resulted higher removal rate. With PS stimulated by microwave ombined with electron donor agents, the removal of chain tetrachloroethylene is better. Chloridion of chain chlorinated solution showed lower dissociation energy. Therefore, with energy-saving microwave stimulating PS combined with electron donor agents, dealing with chlorinat-ed solutions showed obvious removal effect.