بررسی کارایی جاذب نانوحفره سیلیکایی MCM-41 عامل‌دارشده باگروه‌های آلی دی‌آمینی جهت حذف رنگ اسید اورانژ 7 از محلول‌های آبی و فاضلاب کارخانه نساجی

Background and Objectives: The dyestuff manufacturing and textile industries consume a high volume of water and produce a great amount of wastewater containing various toxic substances. Removal of dyes from water by absorption processes has received considerable attention. In the present study, removal of Acid orange7 from aqueous solution using the mesoporous (Mobil Composition of Matter No-41) MCM-41 silica functionalized by diamine group (NH2- MCM-41) was investigated. Materials and Methods: This experimental study was done in samples of synthetic and real wastewater from Kerman Kavir baf Sarir factory within six months. In the first place, the nanoporous MCM-41 silica absorbeut was syn the sized and, then it was functionalized by diamine groups. The influence of pH, absorbent amount and time on the removal of Acid orange 7 was evaluated. Then, the optimal conditions for each of these parameters were determined. The same experiments were done for samples of real wastewater. In order to understand the process of absorption, kinetics of absorption isotherms equilibrium was also studied. SPSS software and regression were used to analyze the data. Results: The highest percentage of Acid orange 7 absorption was observed at pH=4, Retention time of 60Minutes, absorbent amount of 10g/L for synthetic solution with removal efficiency of 82% and for actual solution with the efficiency of 79%. Acid orange 7 dye with density of 60 ml/L resulted in at most 78% removal rate in the real solution.The findings revealed that the removal of Acid orange 7 followed the freundlich isotherm (R2=99%) and the second order synthetic model (R2=98%). Conclusion: The results showed that the NH2-MCM-41 materials are effective absorbents for the dye removal from textile wastewater, especially AO7 dye. Key words: Removal Acid Ornge 7, Nanoporous Silica NH2-MCM-41 Funding: This study was funded by research deputy of Kerman University of Medical Sciences. Conflict of interest: None declared. Ethical approval: The Ethics Committee of Kerman University of Medical Sciences approval the study. How to cite this article: Malakootian M, Macky M. Assessing the Performance of Removal  Acid Orange 7 Dye from Aqueous Solutions and Textile Waste Water by Nanoporous MCM-41 Silica Adsorbent Functionalized by Diamine Group. J RafsanjanUniv Med Sci 2016; 15(1): 37-50. [Farsi]