Abstract
Dredging has been practiced to remove sediment impacted by persistent contaminants, such as heavy metals. Of these metals, lead (Pb) is of particular concern due to its toxicity. Therefore, dredged sediment containing Pb requires further mitigation. One method for Pb mitigation is phytoremediation of dredged sediment. In this study, the partitioning of Pb in sediment during phytoremediation by willow (Salix integra) was assessed. The results showed that, in general, the bioavailable forms of Pb declined with increased application of the standard Hoagland nutrient solution, which appeared to enhance the Fe-Mn oxide fraction and residual inert fraction. In contrast, the addition of excess phosphorus decreased the bioavailable fractions of Pb. However, the bioavailable fractions of Pb increased with additional potassium addition. Planting Salix integra was shown to promote the stabilization of Pb in sediment and led to a transformation from bioavailable forms to non-bioavailable forms. The results suggest that planting Salix integra can remediate Pb-contaminated dredged sediment via Pb immobilization by the roots. During this process, the application of Hoagland nutrient solution and the application of nutrient solutions with exce...Continue Reading
References
May 20, 2000·Chemosphere·C TuH M Chen
Apr 2, 2003·Reviews of Environmental Contamination and Toxicology·Nanthi S BolanRavi Naidu
Feb 28, 2004·Environment International·Y-G ZhuJ-C Yang
Jul 1, 2004·Journal of Environmental Quality·P VervaekeM Verloo
Aug 18, 2004·Environmental Pollution·Abioye O FayigaB Rathinasabapathi
Jan 3, 2009·Journal of Hazardous Materials·Usarat Thawornchaisit, Chongrak Polprasert
Oct 27, 2009·Journal of Hazardous Materials·Changcun LinDeli Wang
Sep 10, 2010·Environmental Monitoring and Assessment·Soumya ChatterjeeS K Mukhopadhyay
May 7, 2011·Journal of Environmental Quality·Yohey HashimotoKenji Shiota
Aug 16, 2011·Chemosphere·Thomas LambrechtsStanley Lutts
Nov 28, 2012·Biodegradation·S DoniG Masciandaro
Dec 12, 2012·Marine Pollution Bulletin·Icaro T A MoreiraBrunno A Falcão
Jan 8, 2014·Journal of Hazardous Materials·Nanthi BolanKirk Scheckel
Feb 25, 2014·Chemosphere·D K GuptaC Walther
Jun 24, 2014·Environmental Science & Technology·David HoubenSophie Opfergelt
Jul 6, 2014·Chemosphere·Xianjin TangPhilip C Brookes
Dec 3, 2014·Journal of Hazardous Materials·Rundong LiXuan Zhu
Jan 7, 2015·Chemosphere·David Houben, Philippe Sonnet
Jun 11, 2015·Ecotoxicology·Agnieszka Baran, Marek Tarnawski
Jan 8, 2016·Ecotoxicology·Mohammed KaderRavi Naidu
Mar 6, 2016·Ecotoxicology·Gabriel GatiMarina Spînu
Aug 3, 2016·Environmental Pollution·Chengqi LinXiaoming Wang
Aug 28, 2016·Journal of Hazardous Materials·Jia WanLele Wang