Physiological responses and metal distributions of different organs of Phragmites australis shoots under acid mine drainage stress
In: Environmental science and pollution research: ESPR, Band 28, Heft 3, S. 3375-3385
ISSN: 1614-7499
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In: Environmental science and pollution research: ESPR, Band 28, Heft 3, S. 3375-3385
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 29, Heft 19, S. 29062-29074
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 28, Heft 45, S. 64757-64768
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 28, Heft 37, S. 51928-51939
ISSN: 1614-7499
In: Environmental science and pollution research: ESPR, Band 26, Heft 16, S. 16097-16104
ISSN: 1614-7499
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 183, S. 109601
ISSN: 1090-2414
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 90, S. 103-111
ISSN: 1090-2414
In: Environmental sciences Europe: ESEU, Band 32, Heft 1
ISSN: 2190-4715
Abstract
Background
Achieving nitrogen (N) and phosphorus (P) control in sediment remediation projects by adding natural materials is receiving increasing attention. In this study, different natural materials, including iron-rich clay minerals, calcite, kaoline, sugarcane bagasse and Phragmites detritus, were applied to test their effects on N and P in a mesocosm experiment.
Results
Iron-rich clay minerals and Phragmites detritus had obvious advantages for P control; they resulted in almost undetectable levels of soluble reactive phosphorus (SRP) in the water column throughout the experiment. This finding can be explained by their strong P adsorption ability. The high level of available organic carbon in the sediment and water column after sugarcane bagasse addition provided enough electron donors for denitrification and dissimilatory nitrate reduction to ammonium (DNRA), which caused nitrate (NO3−-N) deficiency and ammonium (NH4+-N) accumulation in the water column. Additionally, this resulted in anaerobic conditions, further fuelling the release of P from iron-bound P induced by anoxia. Thus, the amount of sugarcane bagasse applied should be considered carefully in order to balance denitrification and DNRA as well as P releases. Calcite and Phragmites detritus are recommended as remediation materials for N removal based on their significant promotion of denitrification and limitation of DNRA, which resulted in low NO3−-N and NH4+-N levels. These results can be explained by the shifts in the functional microbial community composition and abundance after the addition of natural materials.
Conclusions
Iron-rich clay minerals and Phragmites detritus are promising sediment remediation materials for P immobilization due to their strong P adsorption ability. Taken together, the selection of sediment remediation materials should consider the N and P coupling relationship, to prevent NO3−-N removal from causing P leaching or NH4+-N accumulation.
In: Ecotoxicology and environmental safety: EES ; official journal of the International Society of Ecotoxicology and Environmental safety, Band 256, S. 114853
ISSN: 1090-2414