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تاثیر بیوچار بقایای هرس درخت سیب بر شکلهای شیمیایی، شاخص تحرک (MF) و شاخص توزیع کاهش‌یافته (IR) عناصر سنگین در یک خاک آلوده | ||
| دانش آب و خاک | ||
| مقاله 6، دوره 28، شماره 3، پاییز 1397، صفحه 65-78 اصل مقاله (1.02 MB) | ||
| نویسندگان | ||
رقیه حمزه نژاد1؛ ابراهیم سپهر  2؛ عباس صمدی3؛ میر حسن رسولی صدقیانی3؛ حبیب خداوردیلو2
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| 1دانشجوی دکتری، گروه علوم خاک، دانشکده کشاورزی، دانشگاه ارومیه | ||
| 2دانشیار، گروه علوم خاک، دانشکده کشاورزی، دانشگاه ارومیه | ||
| 3استاد، گروه علوم خاک، دانشکده کشاورزی، دانشگاه ارومیه | ||
| چکیده | ||
| به منظور بررسی تأثیر بیوچار بقایای هرس درخت سیب )رقم گلدن دلیشز[1]( بر شکلهای شیمیایی عناصر کادمیم، سرب، مس و روی در خاک آلوده، آزمایشی بصورت فاکتوریل در قالب طرح کاملاً تصادفی با 4 سطح بیوچار (0، 2، 5 و 10 درصد) و 4 زمان انکوباسیون (1، 2، 4 و 8 هفته) در 3 تکرار انجام گرفت و توزیع شکلهای شیمیایی عناصر در زمانهای مذکور با روش عصارهگیری متوالی تسییر تعیین و شاخص توزیعکاهشیافته (IR) و شاخص تحرک (MF) محاسبه گردید. کاربرد بیوچار موجب کاهش معنادار (P ≤ 0.05) عناصر در بخشهای تبادلی و کربناتی و افزایش معنادار عناصر در بخشهای پیوند با ماده آلی و اکسیدهای آهن و منگنز نسبت به خاک شاهد گردید. با افزایش درصد بیوچار افزودهشده به خاک و زمان انکوباسیون، مقدار IR افزایش و مقدار MF کاهش یافت که بیانگر کاهش تحرک فلز با افزایش درصد بیوچار است. درنهایت نتیجهگیری شد که افزودن بیوچار سیب به خاک، منجر به تغییر شکل عناصر از اشکال ناپایدار (شکلهای قابل تبادل و کربناتی) به شکلهای پایدار (شکلهای پیوند خورده با اکسیدهای آهن و منگنز و شکل آلی)، و در نتیجه کاهش تحرک فلزات در خاک میشود. [1] Golden Delicious | ||
| کلیدواژه‌ها | ||
| بیوچار سیب؛ شکلهای شیمیایی؛ فلزات سنگین؛ عصارهگیری متوالی | ||
| عنوان مقاله [English] | ||
| Effect of Apple Pruning Residue Biochar on Chemical Forms, Mobility Factor Index (MF) and Reduced Partition Index (IR) of Heavy Metals in a Contaminated Soil | ||
| نویسندگان [English] | ||
| R Hamzenejad1؛ E Sepehr2؛ A Samadi3؛ MH Rasouli-Sadaghiani3؛ H Khodaverdiloo2 | ||
| 1Ph.D. Student, Dept. of Soil Science, Urmia University, Iran | ||
| 2Assoc. Prof., Dept. of Soil Science, Urmia University, Iran | ||
| 3Prof., Dept. of Soil Science, Urmia University, Iran | ||
| چکیده [English] | ||
| In order to study the effect of apple (Golden delicious variety) pruning residue biochar on chemical forms of Cd, Pb, Cu and Zn in a contaminated soil, an experiment was conducted as a factorial in a completely randomized design (CRD) in three replications with 4 levels of biochar (0, 2, 5 and 10 %) and 4 levels of incubation time (1, 2, 4 and 8 weeks). Chemical distribution of metals in soil was determined using Tessier sequential extraction method during the mentioned incubation times and the reduced partition index (IR) and mobility factor (MF) of the metals were calculated. Application of the biochar significantly (p ≤ 0.05) decreased the exchangeable and carbonate fractions and increased organic and iron and manganese oxide bound fractions in comparison to the control treatment. With increasing the biochar level and incubation time, the IR values were increased, but MF values decreased, demonstrating a decrease in the mobility of metal in soils. It was concluded that the addition of the apple biochar in soil may led to transformation of the metals from unstable forms (e.g. exchangeable and carbonate forms) to stable forms (e.g. iron and manganese oxide bound and residual forms), and consequently decreased the mobility of the metals in soil. | ||
| کلیدواژه‌ها [English] | ||
| Apple biochar, Chemical forms, Heavy metals, Sequential extraction | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 121 تعداد دریافت فایل اصل مقاله: 189 |
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