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امیر پرنیان مصطفی چرم نعمت اله جعفرزاده حقیقی فرد

چکیده

کادمیوم از جمله عناصر کم مقدار و مضر برای حیات و آلاینده ای خطرناک به شمار می رود. این عنصر از طریق منابع آلوده از جمله پساب ها، فاضلاب (شهری و صنعتی) و زه آب های آلوده سبب آلودگی، کاهش کیفیت و گاهی حتی سمیت منابع آب می گردد. با توجه به افزایش جمعیت و نیاز به منابع آب بیشتر، همچنین افزایش آلوده شدن این منابع آبی ارزشمند، نیاز شدیدی به روش های نو و ارزان برای پالایش و بهبود کیفیت آب ها احساس می شود. گیاه پالایی با گیاهان آبزی روشی مؤثر و ارزان برای بهبود کیفیت آب و پساب هاست. گیاه علف شاخی (Ceratophyllum demersum L.) از گیاهان آبزی بومی رودخانه های ایران است، و به وفور در ایران یافت می شود. در این پژوهش طی 14 روز کشت علف شاخی در محلول غذایی هوگلند آلوده در 4 سطح مختلف کادمیوم (1، 2، 4 و 6 میلی گرم در لیتر) پالایش محیط های آبی آلوده به کادمیوم امکان سنجی شد. نتایج حاصله نشان داد که، این گیاه کادمیوم را به مقدار زیادی جذب زیستی کرده است و درصد جذب کادمیوم تا حدود 82% در سطح 2 میلی گرم در لیتر رسید. عامل غلظت زیستی و شاخص جذب حداکثری کادمیوم در سطوح 2 و 6 میلی گرم در لیتر، به ترتیب 9/707 و 92/3 میلی گرم در هر ظرف به دست آمد. کمترین و بیشترین مقدار شاخص تولید زیست توده گیاهی 62/1 و 60/3 گرم در روز، به ترتیب مربوط به سطوح آلودگی 6 و 0 میلی گرم در روز بود. پالایش سبز کادمیوم با رشد و تکثیر گیاه علف شاخی از پساب های صنعتی پیشنهاد می شود.

جزئیات مقاله

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ارجاع به مقاله
پرنیانا., چرمم., & جعفرزاده حقیقی فردن. ا. (2016). امکان سنجی پالایش محیط های آبی آلوده به کادمیوم توسط علف شاخی (Ceratophyllum demersum L.). آب و خاک, 30(6), 1918-1929. https://doi.org/10.22067/jsw.v30i6.23944
نوع مقاله
علمی - پژوهشی