کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6329323 | 1619777 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Risk assessment of total and bioavailable potentially toxic elements (PTEs) in urban soils of Baghdad-Iraq
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کلمات کلیدی
SBFICP/AESPTESMRLMDLMCsHEPASRMEPAADI - NAMEPCA - PCAThermal analysis - آنالیز حرارتیIAEA - آژانس بین المللی انرژی اتمیEnvironmental Protection Agency - آژانس حفاظت از محیط زیستPrincipal component analysis - تحلیل مولفههای اصلی یا PCAMinimal risk level - حداقل سطح خطرCancer risk - خطر سرطانhigh efficiency particulate air - راندمان بالا ذرات هواMonte Carlo Simulation - روش مونت کارلوGIS - سامانه اطلاعات جغرافیاییGPS - سامانه موقعیتیاب جهانیGeographic information system - سیستم اطلاعات جغرافیاییSOC - سیستم روی یک تراشهContamination factor - عامل آلودگیPotentially toxic elements - عناصر سمی بالقوهenrichment factor - غنی سازی عاملBioavailability - فراهم زیستیCorrelation matrix - ماتریس همبستگیMethod Detection Limit - محدودیت تشخیص روشstandard reference material - مرجع استانداردAverage daily intake - میانگین مصرف روزانهelectric conductivity - هدایت الکتریکیSoil organic carbon - کربن آلاینده خاک
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Risk assessment of total and bioavailable potentially toxic elements (PTEs) in urban soils of Baghdad-Iraq Risk assessment of total and bioavailable potentially toxic elements (PTEs) in urban soils of Baghdad-Iraq](/preview/png/6329323.png)
چکیده انگلیسی
The solubility of soil-associated potentially toxic elements (PTEs) in surrogate biological fluids provides valuable information about their potential health hazard. This work addresses the concentrations and bioaccessibility of nine PTEs (As, Co, Cr, Cu, Mn, Ni, Pb, V, and Zn) in thirty eight agricultural land and playground soils collected from a semi-arid urban area of Baghdad-Iraq. Two surrogate biological fluids (SBFs), macrophage vacuole (MS) and gastric (GS) solutions, were used to extract the metals to simulate the biological availability of the PTEs via inhalation and ingestion exposure routes. ICP/AES was used to quantify PTEs in both strong acid digests (for total concentration), and in the SBF extracts. Soil contamination factors showed that some sites exhibited elevated levels of As (36 ± 10 mg/kg), however, these levels of As are not likely to have significant human health impacts whether the particulate arsenic is ingested or/and inhaled. Soil-geochemical variables (including: pH, EC, CO3=, soil organic carbon (SOC)) and major elements (e.g. Al, Ca, and Fe) were used to interpret the lability of PTEs in the soils. Hazardous index (HI) based non-cancer risk of inhalation and ingestion of PTEs was estimated to be 2-fold higher for that based on total element concentrations compared with that for bioavailable fractions for both children and adults. A similar conclusion was reached for the estimated cancer risk (which was lower than the threshold level of concern for children and adults). A sensitivity analysis showed that there is a 97% chance for children and 90% for adults to have hazardous indices of the total PTEs > 1 (the acceptable value); the corresponding metrics for the bioavailable fraction of the elements were 39% for children, and 3% for adults; these results were sensitive to the concentrations of “airborne” soil particles.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 494â495, 1 October 2014, Pages 39-48
Journal: Science of The Total Environment - Volumes 494â495, 1 October 2014, Pages 39-48
نویسندگان
Samera H. Hamad, James J. Schauer, Martin M. Shafer, Esam Abd Al-Rheem, Pamela S. Skaar, Jongbae Heo, Isabel Tejedor-Tejedor,