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اثر نانوذرات و میکروذرات دیاکسیدتیتانیم در تثبیت کادمیم در سوسپانسیونهای خاک در حضور اسیدهومیک | ||
تحقیقات آب و خاک ایران | ||
مقاله 159، دوره 50، شماره 2، خرداد و تیر 1398، صفحه 449-462 اصل مقاله (908.54 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2018.254247.667870 | ||
نویسندگان | ||
ثمانه آریابد1؛ امیر فتوت* 2؛ رضا خراسانی3؛ محمد حسن انتظاری4 | ||
1دانشجوی دکتری علوم خاک، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران | ||
2دانشیار گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه فردوسی مشهد ، مشهد، ایران | ||
3دانشیار گروه علوم و مهندسی خاک، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران | ||
4استاد گروه شیمی، دانشکده علوم، دانشگاه فردوسی مشهد، مشهد، ایران | ||
چکیده | ||
در این مطالعه غیرمتحرککردن کادمیم در خاک در حضور نانوذرات و میکروذرات دیاکسیدتیتانیم و نقش اسیدهومیک در پایداری نانوذرات و جذب کادمیم در سطح نانوذرات و میکروذرات مورد بررسی قرار گرفته است. نتایج این مطالعه نشان داد که در خاک آلوده به کادمیم در محیط سوسپانسیون، اسیدهومیک باعث افزایش فراهمیکادمیم در خاک از طریق افزایش غلظت کادمیم در محلولرویی سوسپانسیونها میشود و اصلاح سطح نانوذرات دیاکسیدتیتانیم با اسیدهومیک جذب کادمیم را در سطح نانوذرات افزایش میدهد. همچنین ازآنجا که میکروذرات غلظت کادمیم محلولرویی سوسپانسیونها و غلظت کادمیم تبادلی را به مقدار بیشتری از نانوذرات کاهش دادهاند میتوان نتیجهگیری کرد که اثر میکروذرات در کاهش فراهمی کادمیم در خاک بیشتر از نانوذرات بوده است. | ||
کلیدواژهها | ||
نانو و میکروذرات دیاکسیدتیتانیم؛ عصاره گیری جزء به جزء کادمیم؛ اسیدهومیک؛ سوسپانسیون خاک؛ پایداری نانوذرات مقدمه | ||
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