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بررسی تاثیر زئولیت، بیوچار آفتابگردان و کربن فعال بر تثبیت سرب در خاک هایی با ویژگی های مختلف | ||
تحقیقات آب و خاک ایران | ||
مقاله 9، دوره 49، شماره 3، مرداد و شهریور 1397، صفحه 573-581 اصل مقاله (795.65 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijswr.2017.231456.667667 | ||
نویسندگان | ||
رضا کیهانی نژاد1؛ علی اشرف امیری نژاد* 2 | ||
1گروه علوم و مهندسی خاک دانشگاه رازی | ||
2استادیار گروه علوم و مهندسی خاک دانشگاه رازی | ||
چکیده | ||
با توجه به اثرات فلزات سنگین بر سلامت انسان، حذف آنها از محیطزیست ضروری است. در این مطالعه، کارآیی چند جاذب در حذف سرب از محلول خاک ارزیابی شد. آزمایش به صورت فاکتوریل، در قالب طرح کاملاٌ تصادفی با سه تکرار اجرا شد. تیمارهای آزمایشی شامل سه نوع جاذب (زئولیت، بیوچار آفتابگردان و کربن فعال)، چهار سطح غلظت سرب (0، 300، 600 و 900 میلیگرم بر لیتر نیترات سرب) و سه نمونه خاک مختلف بود. طبق نتایج، بهترین pH جذب سرب 5 و زمان تعادلی مناسب 24 ساعت بود. همچنین، با افزایش وزن جاذب، میزان حذف فلز سرب از محلول افزایش یافت. همینطور در بیشتر حالات، مدل لانگمویر دادهها را بهتر از مدل فروندلیچ توصیف کرد. از آنجا که غلظت کل سرب واجذب شده با زئولیت و بیوچار کمتر از کربن فعال بود، این موضوع نشان دهنده کارایی بالاتر این جاذبها نسبت به کربن فعال است. | ||
کلیدواژهها | ||
بایوچار؛ کربن فعال؛ زئولایت؛ جذب سطحی | ||
مراجع | ||
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