Phosphorus immobilization in Lake Głęboczek following treatment with polyaluminum chloride

Abstract

In 2001-2003, a survey was conducted of the effectiveness of restoration in the heavily eutrophic polymictic Lake Głęboczek, located in Tuchola. The application of the phosphorus inactivation method with polyaluminum chloride PAX 18 resulted in the complete removal of phosphates, and in a considerable (up to 50-60%) reduction of total phosphorus in the lake water. The sorptive capacity of the bottom sediments was enhanced after the restoration, particularly in the top layer (0-5 cm). An increase of the aluminum content and of mineral forms of phosphorus was observed, mainly the aluminum-bound fraction (at its greatest, by over 330%). The amount of mobile phosphorus in the sediments decreased by 40%. The evidence of the durable immobilization of phosphorus in the aquatic ecosystem was the limited phosphorus release from the bottom sediments. This was confirmed by a significant decrease of total phosphorus in the interstitial waters (from 4-6 mg dm -3 to 2-3 mg dm -3 ), and by a practically complete removal of phosphates from the near-bottom waters.

Shallow lake restoration and water quality management by the combined effects of polyaluminium chloride addition and benthivorous fish removal: a field mesocosm experiment

“…A number of laboratory experimental studies have shown the good performance of PAC in both turbidity and phosphorus removal (Reitzel et al, 2003;Gao et al, 2005;Chen & Luan, 2010;Julio et al, 2010;Yang et al, 2010). The application of PAC in whole lake experiments has shown its efficacy in removing phosphorus from the water column (Reitzel et al, 2005;Lopata & Gawrońska, 2008;Egemose et al, 2011;Jančula & Maršálek, 2012) and turbidity in shallow lakes (Hullebusch et al, 2002), in agreement with our results. As a consequence, the improvement in water transparency is observed mainly due to particle sinking due to coagulation-flocculation.…”

The use of polyaluminium chloride as a restoration measure to improve water quality in tropical shallow lakes

“…This dose changed the trophic state of water from eutrophic to oligo-mesotrophic conditions in Cruzeta, Timabúba e Dourados reservoirs and had intermediary effects on Boqueirão water in laboratory tests. The efficiency in total phosphorus removal is reported for in-lake PAC application (Reitzel et al, 2005;Lopata & Gawrońska, 2008;Egemose et al, 2011;Jančula & Maršálek, 2012). However, PAC showed a low efficiency in improving water quality in Gargalheiras and Passagem das Traíras reservoirs.…”

“…A number of laboratory and field experimental studies has shown the superior performance of PAC in both turbidity and phosphorus removal (Reitzel et al, 2003;Gao et al, 2005;Chen & Luan, 2010;De Julio et al, 2010;Yang et al, 2010;Noyma et al, 2015;Araújo et al, 2016). The application of PAC in whole lake experiments has shown its efficacy in removing phosphorus from the water column (Reitzel et al, 2005;Lopata & Gawrońska, 2008;Egemose et al, 2011;Jančula & Maršálek, 2012) and turbidity even at low dose (1.5 mg Al.L -1 ) in shallow lakes (Van Hullebusch et al, 2002), and it has been suggested as a lake restoration measure. The use of polyaluminium… Acta Limnologica Brasiliensia, 2018, vol.…”

Phytoplankton Composition and Abundance in Restored Maltański Reservoir under the Influence of Physico-Chemical Variables and Zooplankton Grazing Pressure

“…The costs of this removal are the most important disadvantage in applying this method as it is several times more expensive than P-inactivation [ 6 ]. Chemical treatment, which seems to be one of the most popular restoration methods used on lakes, results in rapid and satisfactory effects [ 7 – 15 ]. Owing to their effectiveness for phosphorus inactivation, aluminum and/or iron, salts have most often been used as coagulants applied in lakes and reservoirs during restorations [ 1 ].…”