پایان نامه کارشناسی ارشد رشته معدن : روش های کاهش آلودگی های زیست محیطی ناشی از استفاده سیانید

متن کامل پایان نامه مقطع کارشناسی ارشد رشته مهندسی معدن

با عنوان : روش های کاهش آلودگی های زیست محیطی ناشی از استفاده سیانید

در ادامه مطلب می توانید صفحات ابتدایی این پایان نامه را بخوانید

و در صورت نیاز به متن کامل آن می توانید از لینک پرداخت و دانلود آنی برای خرید این پایان نامه اقدام نمائید.

 

دانشگاه آزاد اسلامی

واحد تهران جنوب

دانشکده تحصیلات تکمیلی

سمینار برای درجه کارشناسی ارشد

مهندسی معدن –استخراج

عنوان :

روش های کاهش آلودگی های زیست محیطی ناشی از استفاده سیانید در صنایع فرآوری مواد معدنی

برای رعایت حریم خصوصی اسامی استاد راهنما،استاد مشاور و نگارنده درج نمی شود

تکه هایی از متن به عنوان نمونه :

(ممکن است هنگام انتقال از فایل اصلی به داخل سایت بعضی متون به هم بریزد یا بعضی نمادها و اشکال درج نشود ولی در فایل دانلودی همه چیز مرتب و کامل است)

 

چکیده:

از آغاز ، تمامی نیاز های خود را از زمین به دست آورده است . گیاهان رابرای رفع

گرسنگی و آب را برای رفع تشنگی و مواد معدنی را برای ساخت ابزارآلات مختلف

از زمین گرفته است . در ازای هر ماده ای که از زمین می گیرد به زمین و محیط

زیست آسیب وارد می کند . به خصوص درباره مواد معدنی که با عملیات مختلف

معدنکاری زیر زمینی و روباز و همچنین فرآوری مواد معدنی خسارات زیادی را به

زمین وارد کرده است . در سال های اخیر استفاده درست از معادن و کاهش آلودگی

های حاصل از معدنکاری در دستور کار دولت ها قرار گرفته است . فراوری مواد معدنی

با ایجاد پساب ها و باطله های سمی مضر یکی از عوامل مهم آلودگی محیط زیست

است .
آلودگی های زیست محیطی باعث از بین رفتن اکوسیستم منطقه شده و زیان های

جبران ناپذیری را به بار خواهد آورد . لذا همواره سازمان های زیست محیطی در

جهت حفاظت از این نعمت دست نیافتنی کوشش کرده و با ایجاد قوانین و مقررات

سختگیرانه مانع آلوده شدن بیش از پیش منابع طبیعی و محیط زیست می شوند .

یکی از مواد مهم و سمی که در صنعت و معدنکاری استفاده ارد سیانید است .

کاربرد سیانید در فلز کاری و آبکاری و در لیچینگ مواد معدنی طلا و نقره است .

با توجه به اینکه طلا از جمله فلزات قیمتی محسوب می شود لذا صرف نظر از

فراوری این ماده معدنی امری غیر ممکن است . از جهتی آلودگی هایی که فراوری

این ماده معدنی براثر استفاده سیانید بر محیط زیست می گذارد شدید و در پهنه

گسترده ای است . این ماده اثرات بسیار مخربی برروی گونه های گیاهی و جانوری

و حتی انسان ها می گذارد . با توجه به خواص سمی و بسیار شدید سیانید گونه های

جانوری به خصوص ماهیان و آبزیان در مواجه با این ماده سمی بی دفاع و کاملا آسیب

پذیر هستند . به طوری که در همه آلودگی های زیست محیطی ناشی از سیانید مقدار

زیادی از آبزیان و حتی وحوش منطقه از بین رفته اند . بنابراین روش هایی که برای

حذف این ماده خطرناک وجود دارد برای حفظ گونه های جانداران و محیط زیست

بسیار حائز اهمیت بوده و تلاش برای ایجاد روش هایی نوین که اثرات این آلودگی

را با قدرت بیشتر و هزینه کمتر و صرف وقت کمتر از بین ببرد همواره در ذهن کار

شناسان محیط زیست است .

تعداد صفحه :134

قیمت : شش هزار تومان

پشتیبانی سایت :              [email protected]

8 فکر می‌کنند “پایان نامه کارشناسی ارشد رشته معدن : روش های کاهش آلودگی های زیست محیطی ناشی از استفاده سیانید

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