Controlling cyanobacterial blooms through effective flocculation and sedimentation with combined use of flocculants and phosphorus adsorbing natural soil and modified clay

被引：110

作者：

Noyma, Natalia Pessoa ^{[1
]}

de Magalhaes, Leonardo ^{[1
]}

Furtado, Luciana Lima ^{[1
]}

Mucci, Maira ^{[2
]}

van Oosterhout, Frank ^{[2
]}

Huszar, Vera L. M. ^{[3
]}

Marinho, Marcelo Manzi ^{[1
]}

Lurling, Miquel ^{[2
,4
]}

机构：

[1] Univ Estado Rio De Janeiro, Dept Plant Biol, Lab Ecol & Physiol Phytoplankton, Rua Sao Francisco Xavier 524 PHLC Sala 511a, BR-20550900 Rio De Janeiro, Brazil

[2] Wageningen Univ, Dept Environm Sci, Aquat Ecol & Water Qual Management Grp, POB 47, NL-6700 AA Wageningen, Netherlands

[3] Univ Fed Rio de Janeiro, Museu Nacl, BR-20940040 Rio De Janeiro, Brazil

[4] Netherlands Inst Ecol NIOO KNAW, Dept Aquat Ecol, POB 50, NL-6700 AB Wageningen, Netherlands

来源：

WATER RESEARCH | 2016年 / 97卷

关键词：

Cyanobacteria bloom; Eutrophication control; Geo-engineering in lakes; Lake restoration; Local red soil; Phosphorus mitigation; LANTHANUM-MODIFIED BENTONITE; MICROCYSTIS-AERUGINOSA COLONIES; HARMFUL ALGAL BLOOMS; LOCAL SOILS; VERTICAL-DISTRIBUTION; PHOSPHATE ADSORPTION; HYDROGEN-PEROXIDE; BRAZILIAN OXISOLS; SURFACE WATERS; CELL-DAMAGE;

D O I：

10.1016/j.watres.2015.11.057

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Eutrophication often results in blooms of toxic cyanobacteria that hamper the use of lakes and reservoirs. In this paper, we experimentally evaluated the efficacy of a metal salt (poly-aluminium chloride, PAC) and chitosan, alone and combined with different doses of the lanthanum modified bentonite Phoslock (R) (LMB) or local red soil (LRS) to sediment positively buoyant cyanobacteria from Funil Reservoir, Brazil, (22 degrees 30'S, 44 degrees 45'W). We also tested the effect of calcium peroxide (CaO2) on suspended and settled cyanobacterial photosystem efficiency, and evaluated the soluble reactive P (SRP) adsorbing capacity of both LMB and LRS under oxic and anoxic conditions. Our data showed that buoyant cyanobacteria could be flocked and effectively precipitated using a combination of PAC or chitosan with LMB or LRS. The SRP sorption capacity of LMB was higher than that of LRS. The maximum P adsorption was lowered under anoxic conditions especially for LRS ballast. CaO2 addition impaired photosystem efficiency at 1 mg L-1 or higher and killed precipitated cyanobacteria at 4 mg L-1 or higher. A drawback was that oxygen production from the peroxide gave positive buoyancy again to the settled flocs. Therefore, further experimentations with slow release pellets are recommended. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：26 / 38

页数：13