低温等离子体技术处理船舶尾气脱硫洗涤水中萘的动力学研究
Kinetics of naphthalene degradation from ship’s emission desulfurization wash water by non-thermal plasma technology
投稿时间:2018-11-03  修订日期:2019-01-10
DOI:10.13788/j.cnki.cbgc.2018.12.001
中文关键词:  多环芳烃    低温等离子体  脱硫洗涤水  湿法脱硫
英文关键词:polycyclic  aromatic hydrocarbons (PAHs), naphthalene, non-thermal  plasma, desulfurization  wash water, wet  desulfurization
基金项目:工业和信息化部高技术船舶科研计划(工信部联装函[2017]21号)
作者单位E-mail
张拿慧 上海海洋大学 海洋生态与环境学院 nhzhang@shou.edu.cn 
胡巍 上海船舶设备研究所  
朱荧 上海海洋大学 海洋生态与环境学院  
凌云 上海海洋大学 海洋生态与环境学院  
彭自然 上海海洋大学 海洋生态与环境学院  
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中文摘要:
      船舶运输因其载重量大、安全等优点作为全球交通运输的重要组成部分,但船舶排放尾气对大气环境造成了严重危害。国际海事组织对船舶排放的硫氧化物和氮氧化物制定了严格的规定。目前船用脱硫技术主要以湿法为主,产生的脱硫废液含有多种有害物质,其中多环芳烃因其毒性大,持久性强成为关注热点。本研究以萘为多环芳烃代表物,采用低温等离体技术对钠碱法脱硫后洗涤水进行处理,研究该过程萘降解的反应动力学参数,考察臭氧剂量、萘初始浓度、温度和pH对萘降解动力学的影响。结果表明,低温等离子体技术产生的臭氧降解萘符合假一级反应动力学,反应速率常数随着臭氧剂量、萘初始浓度和pH的增加而增加,随着温度呈现先增加后降低的趋势。
英文摘要:
      Ship’s transportation with a feature of high carrying capacity and safety has been the main part of global transportation. However, SOX and NOX of ship’s emission have caused a great pressure on air. To reduce the risk of SOX and NOX, International Maritime Organization issued a strict law. Consequently, SOX and NOX must be treated with different technologies. Wet desulfurization technology is one of the most effective approach to reduce SOX emission. However, desulfurization wash water produced from desulfurization process contains many harmful materials, in which polycyclic aromatic hydrocarbons with higher hazard and persistence are one of the major pollutants. In this paper, degradation kinetics of naphthalene using non-thermal plasma technology was investigated along with changes in ozone dosage, naphthalene initial concentration, and temperature and pH values. The results indicated that the degradation of naphthalene by ozone produced from non-thermal plasma followed pseudo-first-order kinetics. Pseudo-first-order rate constants (k) increased with increased ozone dosage, naphthalene initial concentration and pH; however, k followed an increasing then decreasing pattern with increased temperature.
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