Evaluation and Optimization of a Novel Immobilized Photoreactor for the Degradation of Gaseous Toluene          下载免费PDF全文

Morteza Jafarikojour  Morteza Sohrabi  Sayed Javid Royaee  Armineh Hassanvand 《洁净——土壤、空气、水》2015,43(5):662-670

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Biodegradation of 2,4‐Dichlorophenoxyacetic Acid Contaminated Soil in a Roller Slurry Bioreactor          下载免费PDF全文

Yasmen A. Mustafa  Hayder M. Abdul‐Hameed  Zainab Abdul Razak 《洁净——土壤、空气、水》2015,43(8):1241-1247

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广州地区蔬菜生产基地有机污染物含量状况及分布     

游远航 《吉林大学学报(地球科学版)》2015,45(4):1205-1216

为了解广州地区蔬菜基地有机污染物的分布情况,选取了6个代表性基地进行调查采样,测试分析了表层土壤、蔬菜及灌溉水中15种邻苯二甲酸酯(PAEs)化合物、16种多环芳烃(PAHs)化合物和19种有机氯农药(OCPs)化合物的质量分数及质量浓度.结果表明:在15种PAEs化合物的总质量分数(w(ΣPAEs))中,土壤样品为158.0~4 321.0 ng/g,蔬菜样品为1 134.0~48 576.0 ng/g;水样中15种PAEs化合物的总质量浓度(ρ(ΣPAEs))为632.0~14 271.0 ng/L;就单个化合物而言,以DiBP、DBP、DEHP三种污染物为主,其三项之和占所有PAEs质量分数的97.5%~99.1%;在16种PAHs化合物的总质量分数(w(ΣPAHs))中,土壤样品为28.48~1 121.96 ng/g,蔬菜样品为238.09~1 000.61 ng/g;水样中16种PAHs化合物的总质量浓度(ρ(ΣPAHs))为338.21~1 239.78 ng/L;在19种OCPs化合物的总质量分数(w(ΣOCPs))中,土壤为0.04~71.28 ng/g,蔬菜为1.08~9.18 ng/g.总体上看,各基地土壤中DBP质量分数均超标,多环芳烃类在灵山、花东、黄埔菜地土壤中存在轻微污染,有机氯农药均未出现污染.  相似文献   

Removal of Nitroaniline From Water/Ethanol by Electrocoagulation Using Response Surface Methodology          下载免费PDF全文

Guy Bertrand Tamne  Charles Peguy Nanseu‐Njiki  Ede Bodoki  Robert Săndulescu  Radu Oprean  Emmanuel Ngameni 《洁净——土壤、空气、水》2016,44(4):430-437

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Influence of Temperature on the Removal of Extremely High Concentration p‐Nitrophenol Simulated Wastewater by Fe/Cu/H2O Systems          下载免费PDF全文

Bo Lai  Dong‐Hai Yuan  Zhao‐Yu Chen  Yue Yuan  Ping Yang 《洁净——土壤、空气、水》2016,44(4):345-355

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Influence of Nonionic Surfactants on Fungal and Bacterial Degradation of Hexane          下载免费PDF全文

Christopher M. Hessler  George Sorial  Youngwoo Seo 《洁净——土壤、空气、水》2016,44(7):745-752

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茂名油页岩沉积有机质特征及古气候意义     

曹新星  宋之光  李艳  王丽 《地学前缘》2016,23(3):243-252

基于海洋沉积确定的始新世晚期至渐新世早期(约33.5 Ma)的气候过渡期是新生代全球性气候事件,但长期以来相关的陆相沉积记录研究则比较缺乏。本文对形成于始新世晚期至渐新世早期的茂名油柑窝组油页岩样品进行了有机质丰度、烃类组成、单体烃碳同位素组成等分析,以期研究低纬度陆相沉积有机质对古近纪始新世-渐新世气候过渡期(EOT)的响应。研究结果显示,埋藏较浅的上部层位样品正构烷烃碳同位素组成显著正偏,为-19.1‰~-25.9‰,平均值为-22.2‰;而下部层位样品正构烷烃碳同位素组成在-23.7‰~-30.2‰,平均值为-26.3‰。两个样品正构烷烃碳同位素组成之差在1.5‰~8.1‰,平均值之差为4.6‰。正构烷烃碳同位素组成的显著差异指示了EOT低纬度陆相古气候变化引起的陆相有机质响应,而这种响应与当时大气CO2浓度和海洋温度降低导致的气候和植物群落变化密切相关,即可能存在着C3植物向C4植物的转化、C4植物的迅速增加并最终导致沉积有机质碳同位素组成的变化;也可能是由于大气CO2浓度降低导致的大气CO2碳同位素组成整体正偏的结果。很显然,进一步详细的连续剖面分析将对研究古近纪EOT低纬度陆相古气候变化提供重要科学依据。  相似文献   

Chlorinated compounds and polybrominated diphenyl ethers (PBDEs) in mussels (Mytilus galloprovincialis) collected from Apulia Region coasts     

Santina Giandomenico  Lucia Spada  Cristina Annicchiarico  Giorgio Assennato  Nicola Cardellicchio  Nicola Ungaro  Antonella Di Leo 《Marine pollution bulletin》2013

This project was carried out to assess the levels and spatial distribution of organochlorine compounds in the coastal marine environment, using mussels as bioindicators to evaluate the coastal water quality. Levels of polychlorobiphenils (PCB), chlorinated pesticides (DDT isomers, HCH isomers, Aldrin, Dieldrin, alfa-Endosulfan, Hexachlorobenzene, Pentachlorobenzene) and polybrominated diphenyl ethers (PBDEs) were determined in tissues from mussels (Mytilus galloprovincialis) collected along the Apulia Region coasts (Mediterranean Sea). Results indicate that contamination by organochlorine compounds is higher in mussels sampled in the Ionian Sea than in those from the Adriatic Sea, with PCB levels up to seven times higher in mussels from Ionian than from the Adriatic Sea. Although PCB levels were above the maximum values indicated by both European Community (EC) and National regulation in several sample sites, the PCB concentrations were particularly high in some stations, suggesting that these locations require a much specific attention. Conversely, results on the mussel contamination by PBDEs highlight their ubiquitous environmental distribution, and underline the need to establish the maximum level for these compounds in foodstuff, according to European Regulations.  相似文献   

A Novel Concept for the Removal of Solvent Vapors from Exhaust Air     

Diana Ludgen  Hubertus Wichmann  Muefit Bahadir 《洁净——土壤、空气、水》2013,41(8):743-750

The emission of large amounts of solvent vapors with exhaust air from industrial production into the environment is a serious problem. In Germany, industry‐sector‐specific threshold values are applied and technical measures for pollution reduction are required. Different techniques for exhaust air cleaning are in use but still posing problems concerning costs and reliability. For these reasons, the development of processes for exhaust air treatment is the subject of the current research. A new concept for exhaust air cleaning is introduced that combines absorption of a solvent vapor by an organic fluid and a subsequent adsorption by a molecular sieve placed in the absorber. It was managed to close the loops of solvent recovery and sorbents regeneration. In laboratory‐scale experiments it was possible to reduce an initial ethylacetate pollution of 800 mg/m³ or 349 mg C/m³ below the limit value of 75 mg C/m³ over 60 h duration. Thermogravimetric measurements assisted to define optimum conditions for solvent recovery at 180°C from the molecular sieve. One unexpected positive finding was the considerable increase in the solvent release in the presence of the absorption fluid while adsorption isotherms revealed first insight into this process.  相似文献   

Occurrence and distribution of hydrocarbons in the surface microlayer and subsurface water from the urban coastal marine area off Marseilles, Northwestern Mediterranean Sea     

Guigue C  Tedetti M  Giorgi S  Goutx M 《Marine pollution bulletin》2011,62(12):2741-2752

Aliphatic (AHs) and polycyclic aromatic hydrocarbons (PAHs) were analyzed in dissolved and particulate material from surface microlayer (SML) and subsurface water (SSW) sampled at nearshore observation stations, sewage effluents and harbour sites from Marseilles coastal area (Northwestern Mediterranean) in 2009 and 2010. Dissolved and particulate AH concentrations ranged 0.05–0.41 and 0.04–4.3 μg l⁻¹ in the SSW, peaking up to 38 and 1366 μg l⁻¹ in the SML, respectively. Dissolved and particulate PAHs ranged 1.9–98 and 1.9–21 ng l⁻¹ in the SSW, amounting up 217 and 1597 ng l⁻¹ in the SML, respectively. In harbours, hydrocarbons were concentrated in the SML, with enrichment factors reaching 1138 for particulate AHs. Besides episodic dominance of biogenic and pyrogenic inputs, a moderate anthropisation from petrogenic sources dominated suggesting the impact of shipping traffic and surface runoffs on this urbanised area. Rainfalls increased hydrocarbon concentrations by a factor 1.9–11.5 in the dissolved phase.  相似文献