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591.
Soil remediation: humic acids as natural surfactants in the washings of highly contaminated soils 总被引:16,自引:0,他引:16
Conte P Agretto A Spaccini R Piccolo A 《Environmental pollution (Barking, Essex : 1987)》2005,135(3):515-522
The remediation of the highly contaminated site around the former chemical plant of ACNA (near Savona) in Northern Italy is a top priority in Italy. The aim of the present work was to contribute in finding innovative and environmental-friendly technology to remediate soils from the ACNA contaminated site. Two soils sampled from the ACNA site (A and B), differing in texture and amount and type of organic contaminants, were subjected to soil washings by comparing the removal efficiency of water, two synthetic surfactants, sodium dodecylsulphate (SDS) and Triton X-100 (TX100), and a solution of a natural surfactant, a humic acid (HA) at its critical micelle concentration (CMC). The extraction of pollutants by sonication and soxhlet was conducted before and after the soil washings. Soil A was richer in polycyclic aromatic hydrocarbons, whereas soil B had a larger content of thiophenes. Sonication resulted more analytically efficient in the fine-textured soil B. The coarse-textured soil A was extracted with a general equal efficiency also by soxhlet. Clean-up by water was unable to exhaustively remove contaminants from the two soils, whereas all the organic surfactants revealed very similar efficiencies (up to 90%) in the removal of the contaminants from the soils. Hence, the use of solutions of natural HAs appears as a better choice for soil washings of highly polluted soils due to their additional capacity to promote microbial activity, in contrast to synthetic surfactants, for a further natural attenuation in washed soils. 相似文献
592.
Wyrzykowska B Hanari N Orlikowska A Bochentin I Rostkowski P Falandysz J Taniyasu S Horii Y Jiang Q Yamashita N 《Chemosphere》2007,67(9):1877-1886
Pine needles were selected as cost effective and easy collectable matrices suitable for long-term monitoring of the lower troposphere pollution with polychlorinated biphenyls and polychlorinated naphthalenes. The fingerprints of PCNs and PCBs in the top layers of agricultural soils were used for determination of point sources of pollution for terrestrial ecosystems. The new idea based on the use of nona- and decachlorinated isomers fingerprint as an additional tool suitable for the identification of potential point sources of pollution with PCBs, seemed to be a capable tool to identify contamination of soil and ambient air related to former manufacturing and the use of highly chlorinated technical PCB preparations. 相似文献
593.
The results of four toxicity bioassays of selected anionic and nonionic surface active agents were presented. Three widely used anionic surfactants that belong to alkyl sulphates (AS), alkylbenzene sulphonates (LAS) and alkylpolyoxyethylene sulphates (AES) as well as nonionic surfactants: polyoxyethylene alkyl ethers (AE) and polyoxylethylene alkylphenyl ethers (APE) were tested. Three different toxicity assays to aquatic organisms: Physa acuta Draparnaud, Artemia salina and Raphidocelis subcapitata were applied. Additionally, the genotoxicity test with Bacillus subtilis M45 Rec- and H17 Rec+ strains was performed. The obtained results showed that none of the surfactants studied was genotoxic at the concentration 1000 mg l(-1). On the basis of toxicity tests to aquatic organisms all tested anionic surfactants were harmful (LC50 between 10 and 100 mg l(-1)), whereas nonionic ones were toxic (LC50 between 1 and 10 mg l(-1)) or even highly toxic (LC50 below 1 mg l(-1)). Moreover, the bigger was the molecular weight of the tested compound, the higher toxicity was observed. 相似文献
594.
Schaldach Rüdiger Meurer Katharina H. E. Jungkunst Hermann F. Nendel Claas Lakes Tobia Gollnow Florian Göpel Jan Boy Jens Guggenberger Georg Strey Robert Strey Simone Berger Thomas Gerold Gerhard Schönenberg Regine Böhner Jürgen Schindewolf Marcus Latynskiy Evgeny Hampf Anna Parker Phillip S. Sentelhas Paulo César 《Regional Environmental Change》2018,18(1):161-173
Regional Environmental Change - This article describes the design of a new model-based assessment framework to identify and analyse possible future trajectories of agricultural development and... 相似文献
595.
Courtois Pauline Rorat Agnieszka Lemiere Sébastien Levard Clément Chaurand Perrine Grobelak Anna Lors Christine Vandenbulcke Franck 《Environmental science and pollution research international》2021,28(4):3756-3765
Environmental Science and Pollution Research - The use of silver nanoparticles (AgNPs) in agriculture and many consumer products has led to a significant release of Ag in the environment. Although... 相似文献
596.
597.
Tałałaj Izabela Anna Biedka Paweł Bartkowska Izabela 《Environmental Chemistry Letters》2019,17(3):1177-1193
Environmental Chemistry Letters - Landfill leachates from municipal landfills are usually heavily contaminated and thus require treatments before direct discharge into natural waters. Selecting the... 相似文献
598.
Wachowicz-Pyzik Anna Sowiżdżał Anna Pająk Leszek 《Environmental geochemistry and health》2022,44(7):2325-2339
Environmental Geochemistry and Health - The article presents environmental aspects related to the use of geothermal waters of the Lower Jurassic in the area of the Szczecin Trough. The research... 相似文献
599.
Recent events in the nuclear industry have blamed a declining safety culture both on the utility and regulatory side as the major responsible. Confidence in the nuclear industry can be dramatically affected by such events. In this context, the present paper analyses a recent crisis event that involved a research reactor. It shows the time history of the event and how its escalation brought to a temporary shut down of the reactor. In-depth analysis of the event pointed out safety culture deficiencies within the organization. The paper presents the key elements in the ensuing organizational change process and describes the different phases (short and long term approaches), players and measures involved in the process that the organisation set up to address deficiencies and improve safety culture. The case represents an interesting example from which important lessons can be learnt. In particular, staff motivation in terms of involvement in improvement activities is considered central in managing safety. 相似文献
600.
Bourrin François Uusõue Mirjam Artigas Miquel Canals Sànchez-Vidal Anna Aubert Dominique Menniti Christophe Klar Jessica 《Environmental science and pollution research international》2021,28(35):47973-47990
Environmental Science and Pollution Research - Portmán Bay in Southern Spain is one of the most extreme cases in Europe of anthropogenic impact on the marine ecosystem by the disposal of mine... 相似文献