سنتز و مشخصه‌یابی جاذبهای TiO2/Ag برای حذف H2S از پسابهای صنعتی
مهندسی متالورژی و مواد
مقاله 6 ، دوره 36، شماره 3 - شماره پیاپی 39 ، شهریور 1404، صفحه 85-98 1.73 M )
نوع مقاله: مقاله پژوهشی
شناسه دیجیتال (DOI): 10.22067/jmme.2025.94024.1211 نویسندگان
مهدی سلیمانی ؛ سید مهدی رفیعائی*
چکیده در این تحقیق ذرات TiO2/Ag با استفاده از یک روش احیایی بمنظور حذف قابل توجهی از گاز سولفید هیدروژن از پسابهای پالایشگاهی سنتز شد. همچنین ذرات فرآوری شده TiO2/Ag با استفاده از تکنیک‌های مختلفی مانند XRD، SEM، FTIR، UV-Vis و DSC مشخصه‌یابی گردیدند. آنالیز XRD انجام شده موید این واقعیت هستند که مواد سنتز شده دارای شبکه کریستالی تتراگونال بوده و مواد فرآوری شده فاقد هرگونه فازهای دیگر و ناخالصی است. نتایج حاصل از تصاویر SEM نشان داد که اندازه ذرات فرآوری شده TiO2/Ag عمدتا در محدوده تقریبی 120 تا 160 نانومتر بوده و از توزیع یکنواختی برخوردار هستند ضمن آنکه مطابق با نتایج آزمون EDX-Map مشاهده گردید که عناصر مختلف و از جمله نقره با کیفیت مطلوبی در مواد سنتز شده توزیع شده‌اند. آنالیز حرارتی مواد سنتز شده تا دمای 1000 درجه سانتیگراد نشان داد که پیک-های ایجاد شده در دماهای 47 و 310 درجه سانتیگراد به ترتیب مربوط به تبخیر آب سطحی و حذف فازهای آلی بوده و حدود 5/1 درصد از وزن آنها کاهش یافته است. در نهایت آنالیز UV-Vis نشان داد که با بخدمت گیری مواد جاذب سنتز شده میزان عبور نور از پسابها به میزان قابل قبولی افزایش و در واقع تصفیه پسابها تا حدود مناسبی انجام شده است. این پدیده به واکنش میان Ag و H2S موجود در پساب و تشکیل Ag2S نسبت داده می‌شود. کلیدواژه‌ها
پساب پالایشگاه ؛ سولفید هیدروژن ؛ TiO2 ؛ TiO2/Ag
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