INTRODUCTIONThe etiopathogenesis of ulcerative colitis (UC)remains obscure,due to lack of an ideal animalmodel.With thc improvement of theory andmethodology in the last 30 years,people used toadopt chemicals(acetic ac...INTRODUCTIONThe etiopathogenesis of ulcerative colitis (UC)remains obscure,due to lack of an ideal animalmodel.With thc improvement of theory andmethodology in the last 30 years,people used toadopt chemicals(acetic acid,ethanol,carrageen,etc.),immunotechniques(humoral or cellularimmunity,immune complex) and substance derivedfrom UC patients to set up various kinds of UCanimal model,which mimic the pathologic changesof human UC,so far these remain far展开更多
A combined zero valent iron （ZVI） and anaerobic-aerobic process was adopted for the treatment of 2,4-dinitrochlorobenzene （DNCB）- containing wastewater. The transformation pathway, reduction of acute toxicity and ...A combined zero valent iron （ZVI） and anaerobic-aerobic process was adopted for the treatment of 2,4-dinitrochlorobenzene （DNCB）- containing wastewater. The transformation pathway, reduction of acute toxicity and enhancement of biodegradability were investigated, After pretreatment by ZVI, DNCB in wastewater could be completely converted into 2,4-diaminochlorobenzene （DACB）. The ratio of BODs/COD increased from 0.005±0.001 to 0.168±0.007, while EC50,48hr （V/V） increased from 0.65% to 5.20%, indicating the enhancement of biodegradability and reduction of acute toxicity with the pretreatment by ZVI. DACB was further dechlorinated to m-phenylenediamine during the anaerobic process using methanol as electron donor, with EC50＇ 48 hr increasing from 5.20% to 48.2%. After the subsequent anaerobic-aerobic process, m-phenylenediamine was degraded completely, with effluent COD of 67.5±10.8 mg/L. This effluent of the subsequent anaerobic-aerobic process was not toxic to zebrafish. The combined ZVI and anaerobic-aerobic process offers bright prospects for the treatment of chlorinated nitroaromatic compound-containing wastewater.展开更多
文摘INTRODUCTIONThe etiopathogenesis of ulcerative colitis (UC)remains obscure,due to lack of an ideal animalmodel.With thc improvement of theory andmethodology in the last 30 years,people used toadopt chemicals(acetic acid,ethanol,carrageen,etc.),immunotechniques(humoral or cellularimmunity,immune complex) and substance derivedfrom UC patients to set up various kinds of UCanimal model,which mimic the pathologic changesof human UC,so far these remain far
基金financed by the Innovation Program of Foundation Productthe National Natural Science Foundation of China (No.50978136, 51208258)+4 种基金the Major Project of Water Pollution Control and Management Technology of China (No.2012ZX07101-003-001)the Natural Science Foundation of Jiangsu Province (No.BK2011717)the China Post doctoral Science Foundation(No.2011M500927)the Jiangsu Planned Projects for Postdoctoral Research Funds (No.1101014C)the Fundamental Research Funds for Central Universities (No.NUST2011ZDJH20, NUST2011PYXM05)
文摘A combined zero valent iron （ZVI） and anaerobic-aerobic process was adopted for the treatment of 2,4-dinitrochlorobenzene （DNCB）- containing wastewater. The transformation pathway, reduction of acute toxicity and enhancement of biodegradability were investigated, After pretreatment by ZVI, DNCB in wastewater could be completely converted into 2,4-diaminochlorobenzene （DACB）. The ratio of BODs/COD increased from 0.005±0.001 to 0.168±0.007, while EC50,48hr （V/V） increased from 0.65% to 5.20%, indicating the enhancement of biodegradability and reduction of acute toxicity with the pretreatment by ZVI. DACB was further dechlorinated to m-phenylenediamine during the anaerobic process using methanol as electron donor, with EC50＇ 48 hr increasing from 5.20% to 48.2%. After the subsequent anaerobic-aerobic process, m-phenylenediamine was degraded completely, with effluent COD of 67.5±10.8 mg/L. This effluent of the subsequent anaerobic-aerobic process was not toxic to zebrafish. The combined ZVI and anaerobic-aerobic process offers bright prospects for the treatment of chlorinated nitroaromatic compound-containing wastewater.
