Influence of nitrogen species (NH4+ and NO3-) on the dynamics of P in water-sediment-Salvinia herzogii systems

被引:17
作者
Panigatti, MC [1 ]
Maine, MA [1 ]
机构
[1] Univ Nacl Litoral, Fac Ingn Quim, RA-3000 Santa Fe, Argentina
关键词
water; Salvinia herzogii; sediment; phosphorus; Middle Parana;
D O I
10.1023/A:1024860213797
中图分类号
Q17 [水生生物学];
学科分类号
071004 ;
摘要
Water - Salvinia herzogii - sediment systems were exposed to different phosphorus and nitrogen combinations in outdoor experiments. The aim was to estimate the amounts of P immobilized in macrophytes and sediments, as well as to elucidate whether or not the presence of N affects the retention of P. The following components were added: o-P, o-P + NH4+, o-P + NO3- + NH4+, o-P + NO3-. The concentration of nutrients was periodically determined throughout the experiment ( 28 days). The concentrations of P and N in plant tissues and sediments were determined at the beginning and the end of the experiment. Sequential extractions of P-fractions in sediment were performed using the EDTA method ( Golterman, 1996). The removal efficiency of P in water was 95-99%. The removal of NH4+ (97 - 98%) was more effective than that of NO3- (44 - 86%). The presence of nitrogen species increased the removal velocity of o-P from water, NH4+ was the most effective species. Sediments not only had higher P removal rates than macrophytes but, in the control treatment without macrophytes, they reached the values obtained by macrophytes plus sediments in the other treatments. The adsorption of P takes place at the surface layer of the sediment ( 1 cm). Most of the P incorporated into the sediment during the experiment was sorbed by the fraction Fe(OOH)approximate toP. The addition of nutrients to water modified the leaves/lacinias weight ratio.
引用
收藏
页码:151 / 157
页数:7
相关论文
共 26 条
[1]  
[Anonymous], STUDIES BIOL
[2]  
[Anonymous], STAND METH EX WAT WA
[3]  
AOI T, 1996, WAT SCI TECH, V43, P407
[4]  
BISHOP PL, 1989, J WATER POLLUT CON F, V61, P641
[5]   VASCULAR AQUATIC PLANTS FOR MINERAL NUTRIENT REMOVAL FROM POLLUTED WATERS [J].
BOYD, CE .
ECONOMIC BOTANY, 1970, 24 (01) :95-&
[6]   NUTRIENT CONCENTRATION OF AQUATIC PLANTS - PATTERNS ACROSS SPECIES [J].
DUARTE, CM .
LIMNOLOGY AND OCEANOGRAPHY, 1992, 37 (04) :882-889
[7]   USE OF MACROPHYTES FOR POLLUTION TREATMENT IN URBAN WETLANDS [J].
ELLIS, JB ;
SHUTES, RB ;
REVITT, DM ;
ZHANG, TT .
RESOURCES CONSERVATION AND RECYCLING, 1994, 11 (1-4) :1-12
[8]   ROLE OF AQUATIC PLANTS IN WASTE-WATER TREATMENT BY ARTIFICIAL WETLANDS [J].
GERSBERG, RM ;
ELKINS, BV ;
LYON, SR ;
GOLDMAN, CR .
WATER RESEARCH, 1986, 20 (03) :363-368
[9]   Fractionation of sediment phosphate with chelating compounds: A simplification, and comparison with other methods [J].
Golterman, HL .
HYDROBIOLOGIA, 1996, 335 (01) :87-95
[10]   Remarks on numerical and analytical methods to calculate diffusion in water sediment systems [J].
Golterman, HL .
HYDROBIOLOGIA, 1995, 315 (01) :69-88