亚铁联合不同氧化剂对石油烃污染场地热脱附废水的处理  

Ferrous Iron Combined with Different Oxidants for Thermal Desorption Wastewater Treatment from Petroleum Hydrocarbon Contaminated Sites

作　　者：王曦 李惠平 梁郡 肖丰 殷峻[3] 庞维海[2] 谢丽[2] 陈静静 WANG Xi;LI Huiping;LIANG Jun;XIAO Feng;YIN Jun;PANG Weihai;XIE Li;CHEN Jingjing(Tongji Architectural Design(Group)Co.,Ltd.,Shanghai 200092,China;Key Laboratory of Yangtze River Water Environment of the Ministry of Education,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;School of Environmental Science and Engineering,Zhejiang Gongshang University,Hangzhou 310008,China)

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092 [2]长江水环境教育部重点实验室,同济大学环境科学与工程学院,上海200092 [3]浙江工商大学环境科学与工程学院,浙江杭州310018

出　　处：《同济大学学报（自然科学版）》2023年第11期1753-1762,共10页Journal of Tongji University:Natural Science

摘　　要：采用亚铁(Fe^(2+))分别联合次氯酸钠(NaClO)、过硫酸钠(Na_(2)S_(2)O_(8))和过氧化氢(H_(2)O_(2))3种氧化剂处理某原油浸染土壤的热脱附废水,考察了pH值、Fe^(2+)投加量、氧化剂投加量和反应时间对处理效能的影响。Fe^(2+)/H2O2和Fe^(2+)/Na₂S₂O8均能有效去除热脱附废水中的典型污染物——石油烃物质,去除率分别达到100.0%和97.8%,但Fe^(2+)/H_(2)O_(2)体系对化学耗氧量(COD)的去除效果明显优于Fe^(2+)/Na_(2)S_(2)O_(8)。Fe^(2+)/H2O2可将有机物彻底氧化分解,而Fe^(2+)/NaClO和Fe^(2+)/Na_(2)S_(2)O_(8)仅是将有机物氧化分解为中间物质。多元变量分析结果表明,pH值和氧化剂投加量是影响去除效果的主要因素,Fe^(2+)/H_(2)O_(2)处理热脱附废水的吨水处理成本较高,但是综合效果最好;Fe^(2+)/Na_(2)S_(2)O_(8)处理成本次之,但无法彻底降解COD;Fe^(2+)/NaClO成本最低,但对有机物去除效果最差。综合去除效果和经济因素考量,Fe^(2+)/H_(2)O_(2)体系更适用于处理热脱附废水。Ferrous iron(Fe^(2+))combined with three oxidants,sodium hypochlorite(NaClO),sodium persulfate(Na_(2)S_(2)O_(8))and hydrogen peroxide(H_(2)O_(2))were used to treat thermal desorption wastewater from the crude oil-contaminated soil.The influences of pH,Fe^(2+)dosage,oxidant dosage and reaction time on the treatment efficiency were investigated.The results show that PHCs(typical pollutants in thermal desorption wastewater)can be effectively removed by Fe^(2+)/H_(2)O_(2) and Fe^(2+)/Na_(2)S_(2)O_(8),with a removal efficiency of 100.0%and 97.8%,respectively.However,the chemical oxygen demand(COD)removal efficiency of Fe^(2+)/H_(2)O_(2) system is significantly higher than that of Fe^(2+)/Na_(2)S_(2)O_(8).Fe^(2+)/H_(2)O_(2) can oxidize and decompose organic matters completely,while Fe^(2+)/NaClO and Fe^(2+)/Na_(2)S_(2)O_(8) can only convert organic matters into intermediate substances.The multivariate analysis results indicate that pH and oxidant dosage are the main factors affecting the removal efficiency.The cost of Fe^(2+)/H_(2)O_(2) in the treatment of thermal desorption wastewater is higher,but it has the best removal efficiency.The cost of Fe^(2+)/Na_(2)S_(2)O_(8) is lower than that of Fe^(2+)/H_(2)O_(2).However,COD cannot be degraded completely.Fe^(2+)/NaClO has the lowest cost but the worst removal efficiency.Hence,considering the removal effect and economic factors,the Fe^(2+)/H_(2)O_(2) system is more suitable for the treatment of thermal desorption wastewater.

关 键 词：热脱附废水 石油烃物质 高级氧化技术 经济分析 

分 类 号：X524[环境科学与工程—环境工程]