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地下水-土系统中PAHs复合污染吸附/解吸机理研究进展 被引量:1
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作者 王磊 刘俊建 +1 位作者 周爱国 石建省 《安全与环境工程》 CAS 2016年第5期55-60,共6页
地下水-土系统中多环芳烃类(Polycyclic Aromatic Hydrocarbons,PAHs)污染是目前研究的热点问题之一,研究焦点正逐步由单一污染向复合污染转变,而在地下水-土系统中PAHs复合污染的吸附/解吸机理是其调查与修复研究的关键问题。结合目前... 地下水-土系统中多环芳烃类(Polycyclic Aromatic Hydrocarbons,PAHs)污染是目前研究的热点问题之一,研究焦点正逐步由单一污染向复合污染转变,而在地下水-土系统中PAHs复合污染的吸附/解吸机理是其调查与修复研究的关键问题。结合目前国内外研究进展,对重金属、非金属类物质与PAHs复合污染时竞争性吸附/解吸机理、热力学特征和影响因素等方面的研究进行评述,认为今后的研究方向是PAHs与复合污染物间交互作用的定量分析,分子水平竞争性吸附/解吸机理研究,生物吸附、化学吸附与PAHs生物毒性影响关系研究等方面,随着上述工作的逐渐深入,必将推进地下水-土系统中复合污染的研究进程。 展开更多
关键词 地下水-土系统 PAHS 复合污染 吸附/解吸机理 影响因素
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地下水-土系统中苯并三唑去除方法研究
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作者 邢辰 梁静 《安徽农业科学》 CAS 2012年第26期13064-13067,共4页
含苯并三唑的地下水很难用常规的水污染处理方法去除,因此迫切需要探讨它在地下水-土系统中有效的去除方法。详细介绍了吸附法、光激发氧化法和生物法,并且针对这些方法应用到地下水中的可行性进行了分析。结果表明,吸附法受到环境因素... 含苯并三唑的地下水很难用常规的水污染处理方法去除,因此迫切需要探讨它在地下水-土系统中有效的去除方法。详细介绍了吸附法、光激发氧化法和生物法,并且针对这些方法应用到地下水中的可行性进行了分析。结果表明,吸附法受到环境因素的限制,并会发生缓慢的解析过程,需进一步探索和完善;光激发氧化法去除效果较好但仍处于探索阶段,需改善耗费较多人力、物力、财力的缺点。目前的生物法很难对苯并三唑进行降解,尚需要进一步的研究。 展开更多
关键词 苯并三唑 地下水-土系统 去除方法
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Impact of Land-use Patterns on Distributed Groundwater Recharge and Discharge——A Case Study of Western Jilin,China 被引量:4
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作者 Moiwo Juana PAUL 《Chinese Geographical Science》 SCIE CSCD 2006年第3期229-235,共7页
The impact of land-use on distributed groundwater recharge and discharge in the western Jilin (WJ) was analyzed in this study. WJ is a transitional, semi-arid zone with a fragile, hydrological closed ecosystem in the ... The impact of land-use on distributed groundwater recharge and discharge in the western Jilin (WJ) was analyzed in this study. WJ is a transitional, semi-arid zone with a fragile, hydrological closed ecosystem in the Songhua River Basin (SRB). The research tool includes a seamlessly linked MODFLOW, WetSpass, the Seepage packages, and ArcGIS. The model calibration showed good agreement between simulated water table elevation and measured water table depths, while predicted groundwater discharge zones showed strong correlations with field occurrences of drainage systems and wetlands. Simulated averages for distributed recharge, water table elevation and groundwater drawdown were 377.42mm/yr, 194.43m, and 0.18m respectively. Forest vegetation showed the highest recharge, followed by ag- ricultural farmlands, while open-water and other drainage systems constituted groundwater exit zones. When present land-use conditions were compared with the hypothetical natural pre-development scenario, an overall loss of ground- water recharge (24.09mm/yr) was observed, which for the project area is 18.05×108m3. Groundwater abstraction seemed to be the cause of water table drawdown, especially in the immediate vicinities of the supply wells. An important issue of the findings was the ability of the hypothetical forest vegetation to protect, and hence sustain aquifer reserves and dependent ecosystems. The profound data capture capability of ArcGIS makes it particularly useful in spa- tio-temporal hydroecological modeling. 展开更多
关键词 land-use ECOSYSTEM GROUNDWATER RECHARGE DISCHARGE Western Jilin
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Migration of Cr_2O_7^(2-) and Butanone in Soil and Groundwater System After the Tianjin Port 8·12 Explosion
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作者 Liyan Liu Shaopan Liang +2 位作者 Hongchen Liu Wei Tan Guorui Zhu 《Transactions of Tianjin University》 EI CAS 2018年第6期522-531,共10页
After the Tianjin Port 8.12 explosion, an enormous amount of potassium dichromate (K2Cr2O7) and butanone (CH3COCH2CH3) leaked into the coastal soil-groundwater system, which potentially threatened the environment ... After the Tianjin Port 8.12 explosion, an enormous amount of potassium dichromate (K2Cr2O7) and butanone (CH3COCH2CH3) leaked into the coastal soil-groundwater system, which potentially threatened the environment and human health. Determining the transport process of hazards is necessary to establish guidelines for remediating the contaminated area. This work aims to investigate the migration of potassium dichromate and butanone in the coastal soil-groundwater system through a coupling unsaturated-saturated numerical model, incorporating the HYDRUS model into the MODFLOW/ MT3D model. In the unsaturated zone, two-dimensional HYDRUS model was applied, and its recharge flux at the bottom boundary was utilized as the input of MODFLOW/MT3D model in the saturated zone. Results showed that Cr2O^(2-)7 migrated much faster than butanone in the unsaturated zone and reached the water table in about 1 year. In comparison, butanone was unlikely to enter the aquifer even 5 years later with a migration depth of about 2.2 m. Driven by groundwater, the Cr2O^(2-)7 that entered the aquifer migrated about 161 m toward southeast 5 years later. In the saturated zone, the contamination plume covered mainly the southeast area due to the groundwater flow direction. 展开更多
关键词 Potassium dichromate BUTANONE HYDRUS MODFLOW Coastal soil-groundwater system Tianjin Port 8·12 explosion
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