کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4410562 1307552 2011 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Atmospheric phosphorus in the northern part of Lake Taihu, China
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Atmospheric phosphorus in the northern part of Lake Taihu, China
چکیده انگلیسی

Eutrophication, which has been linked to enhanced nutrient loading in lakes, estuarine and coastal waters, is common to many water bodies in China, including Lake Taihu. The atmosphere is an important and growing source of new nutrients entering water bodies. To assess the impact of atmospheric phosphorus (P) on water quality of Lake Taihu, we have estimated the atmospheric input of P by measuring its concentrations in aerosols and in rainwater. Samples were collected at the northeastern part of the lake. The P concentration in total suspended particle ranged from 0.054 to 0.300 μg m−3. Concentrations of P in aerosols in the winter and autumn samples were higher than those in the spring and summer samples. Soluble inorganic P (SIP), which provides direct nutrient sources to algae, accounts for 4.9%–83.4% of the total P. Principal Component Analysis of the measured aerosol constituents and examination of inter-species correlation indicate that SIP was correlated with elemental carbon, water soluble organic carbon, NO3-, and Ca2+. Such correlations could be explained if two nearby coal-fired power plants were a major aerosol P sources. The average concentration of the total P in rain water samples was 0.082 ± 0.058 mg P/L. The annual deposition flux of P into the northern part of Lake Taihu was estimated to be in the range of 0.04–0.44 kg ha−1 year−1 through dry deposition and 0.33 kg ha−1 year−1 through wet deposition. The combined wet and dry deposition was less than 8% of riverine P input, therefore the atmospheric deposition was only a minor contributor to P in Lake Taihu at the time of this study.

Research highlights
► Aerosol P above Lake Taihu in the winter and autumn were higher than other seasons.
► The aerosol SIP above Lake Taihu may mainly be from nearby coal-fire power plants.
► Atmospheric P input made a minor contribution to the total P input into Lake Taihu.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 84, Issue 6, August 2011, Pages 785–791
نویسندگان
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