硫酸铁改性活性炭催化微波降解对硫磷的研究  

Investigation on Microwave Degradation of Parathion in the Presence of Modified Activated Carbon Catalyst with Ferric Sulfate

作　　者：张朝红[1] 单亚波[1] 臧树良[2] 凌洪洁[1] 董殿波[1] 陈中林[1] 赵哲[1] 张华春[1] 

机构地区：[1]辽宁大学环境科学系,辽宁沈阳110036 [2]辽宁大学化学系,辽宁沈阳110036

出　　处：《中国给水排水》2006年第11期26-30,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(20271024);辽宁省教育厅自然科学基金资助项目(05L154)

摘　　要：在有硫酸铁改性活性炭存在下,微波照射能使溶液中的对硫磷(乙基1605)迅速降解。对于总体积为25mL、浓度为30mg/L的乙基1605溶液,在改性活性炭加入量为0.6g/L的条件下,经微波照射2.5min后降解率达100%。而同样条件下采用未改性活性炭作催化剂,尽管对乙基1605的降解率也为100%,但很大一部分是由活性炭的强吸附作用造成的。这表明,在微波照射下改性活性炭的催化活性明显高于未改性活性炭的。另外,采用紫外—可见光谱和离子色谱技术探讨了微波照射时间、乙基1605初始浓度、活性炭用量、硫酸铁溶液的浓度和酸度、乙基1605溶液的酸度和活性炭使用次数对改性活性炭催化微波降解乙基1605的影响。Parathion in aqueous solution can be degraded rapidly under microwave irradiation in the presence of modified activated carbon catalyst with ferric sulfate. The degradation rate reaches 100 % for parathion solution of 25 mL with initial concentration of 30 mg/L under 0.6 g/L dosage of modified activated carbon and 2.5 min microwave irradiation. Under the same microwave irradiation, the degradation rate can also reach 100 % using unmodified activated carbon, but it is caused by strong adsorption of unmodified activated carbon to a great extent. The results show the catalytic activity of the modified activated carbon is clearly better than that of unmodified activated carbon under microwave irradiation. In addition, the effects of microwave irradiation time, initial concentration of parathion, dosage of modified activated carbon, concentration and acidity of ferric sulfate solution, acidity of parathion solution and used times of modified activated carbon on microwave degradation of parathion in the presence of modified activated carbon catalyst were discussed by adopoting the UV -Vis spectrum and ion chromatography technologies

关 键 词：硫酸铁改性 活性炭催化 微波降解 对硫磷 

分 类 号：X703.1[环境科学与工程—环境工程]