حذف آرسنیک از محلول لیچینگ باردار با استفاده از روش انعقاد الکتروشیمیایی

مهندسی متالورژی و مواد

مقاله 8، دوره 32، شماره 2 - شماره پیاپی 24، شهریور 1400، صفحه 95-114   

نوع مقاله: علمی و پژوهشی

شناسه دیجیتال (DOI): 10.22067/jmme.2021.58937.0

نویسندگان

سید مرتضی موسوی راد^{* 1}؛ علی حسن زاده سلبوئی^{* 2}

¹گروه پژوهشی محیط زیست، پژوهشگاه علوم و تکنولوژی پیشرفته و علوم محیطی، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

²معاونت امور معادن و صنایع معدنی، سازمان صنعت، معدن و تجارت استان کرمان، کرمان، ایران.

چکیده

در مطالعه حاضر، فرآیند انعقاد الکتروشیمیایی (الکتروکواگولاسیون) در صنایع معدنی به منظور حذف یون آرسنیک از محلول لیچینگ باردار PLS)) کارخانه فرآوری مس، مورد بررسی قرار گرفته است. نمونه ها حاصل از شبیه سازی فرآیند لیچینگ و با افزودن نمک آرسنیک سه ظرفیتی (NaAsO2) تهیه گردید. تأثیرات سه پارامتر مستقل مانند pH (X₁)، زمان الکترولیز (X₂)، چگالی جریان (X₃) با استفاده از روش سطح پاسخ (RSM) بمنظور بررسی حذف آرسنیک از محلول PLS، بررسی شد. این طرح شامل 17 مجموعه آزمایش با استفاده از سیستم الکتروکواگولاسیون می باشد. در این تحقیق، طرح آزمایش باکس – بنکن در روش سطح پاسخ با سه عامل عددی در سه سطح برای بررسی اثر تعاملی متغیرهای فرآیند به منظور بررسی راندمان حذف آرسنیک از محلول لیچینگ با استفاده از روش الکتروکواگولاسیون، مورد بررسی قرار گرفت. شرایط بهینه برای فرآیند الکتروکواگولاسیون در 5/6pH:، زمان الکترولیز: 114 دقیقه و چگالی جریان الکتریکی A/m² 3/65، با راندمان حذف88/96٪ حاصل شد. نتایج نشان داد که قابلیت فرآیند الکتروکواگولاسیون به عنوان یک روش قابل اعتماد و قابل اطمینان به منظور حذف یون های فلزی بخصوص یون آرسنیک از پساب های صنایع معدنی به ویژه در کارخانجات فرآوری مواد معدنی بسیار مطلوب می باشد.
 
 

کلیدواژه‌ها

محلول لیچینگ باردار؛ انعقاد الکتروشیمیایی؛ آرسنیک؛ روش سطح پاسخ

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