کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4410561 1307552 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Can urban P conservation help to prevent the brown devolution?
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Can urban P conservation help to prevent the brown devolution?
چکیده انگلیسی

Achieving better understanding phosphorus (P) flows through urban ecosystems is needed to conserve P, as non-renewable phosphate rock deposits become depleted and the global human population increases. A baseline mass flow analysis (MFA) for P developed for the Twin Cities Watershed (TCW, which includes most of the Minneapolis-St. Paul metropolitan region) showed that most P input was stored in the system (65%) or leaked from it (31%); only 4% was deliberately exported as useful products. In a realistic, comprehensive conservation scenario P input was reduced by 15%; deliberate export of P in the form of sewage sludge, food waste, and landscape waste was 68% of P input. In this scenario, increased deliberate export was accomplished by decreasing leakage (to 9% of input) and storage (to 23% of input). If used as agricultural fertilizer, the deliberately exported P in the conservation scenario would support about half of the food production required by the TCW.


► Globally, phosphate rock is being exhausted. This will require us to utilize phosphorus (P) more efficiently.
► A mass flow analysis for the Twin Cities showed that 96% of P entering the city in 2000 was stored or leaked.
► A comprehensive, but realistic conservation scenario showed that P recycling could provide about half of the P needed to provide food for the city.
► More efficient recycling of P would also reduce eutrophication.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemosphere - Volume 84, Issue 6, August 2011, Pages 779–784
نویسندگان
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