کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6316390 1619175 2015 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Urban legacies and soil management affect the concentration and speciation of trace metals in Los Angeles community garden soils
ترجمه فارسی عنوان
میراث شهری و مدیریت خاک بر غلظت و ایجاد فلزات ریز در خاک های محلی لوس آنجلس تأثیر می گذارند
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی
Heavy metals in urban soils can compromise human health, especially in urban gardens, where gardeners may ingest contaminated dust or crops. To identify patterns of urban garden metal contamination, we measured concentrations and bioavailability of Pb, As, and Cd in soils associated with twelve community gardens in Los Angeles County, CA. This included sequential extractions to partition metals among exchangeable, reducible, organic, or residual fractions. Proximity to road increased all metal concentrations, suggesting vehicle emissions sources. Reducible Pb increased with neighborhood age, suggesting leaded paint as a likely pollutant source. Exchangeable Cd and As both increased with road proximity. Only cultivated soils showed an increase in exchangeable As with road proximity, potentially due to reducing humic acid interactions while Cd bioavailability was mitigated by organic matter. Understanding the geochemical phases and metal bioavailability allows incorporation of contamination patterns into urban planning.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 197, February 2015, Pages 1-12
نویسندگان
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