Eutrophication management in surface waters using lanthanum modified bentonite: a review

Copetti, Diego; Finsterle, Karin; Marziali, Laura; Stefani, Fabrizio; Tartari, Gianni; Douglas, Grant; Reitzel, Kasper; Spears, Bryan M.; Winfield, Ian J.; Crosa, Giuseppe; D'Haese, Patrick; Yasseri, Said; Lurling, Miquel. 2016 Eutrophication management in surface waters using lanthanum modified bentonite: a review [in special issue: Geo-engineering to manage eutrophication in lakes] Water Research, 97. 162-174.

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This paper reviews the scientific knowledge on the use of a lanthanum modified bentonite (LMB) to manage eutrophication in surface water. The LMB has been applied in around 200 environments worldwide and it has undergone extensive testing at laboratory, mesocosm, and whole lake scales. The available data underline a high efficiency for phosphorus binding. This efficiency can be limited by the presence of humic substances and competing oxyanions. Lanthanum concentrations detected during a LMB application are generally below acute toxicological threshold of different organisms, except in low alkalinity waters. To date there are no indications for long-term negative effects on LMB treated ecosystems, but issues related to La accumulation, increase of suspended solids and drastic resources depletion still need to be explored, in particular for sediment dwelling organisms. Application of LMB in saline waters need a careful risk evaluation due to potential lanthanum release.

Item Type: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Parr
ISSN: 0043-1354
Additional Keywords: lanthanum modified bentonite, toxicity, phosphorus, sediments, ecological recovery, geo-engineering
NORA Subject Terms: Ecology and Environment
Date made live: 09 Dec 2015 11:11 +0 (UTC)

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