کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7216216 1469674 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Addressing technical barriers for reliable, safe removal of fluoride from drinking water using minimally processed bauxite ores
ترجمه فارسی عنوان
رفع موانع فنی برای حذف قابل اعتماد و ایمن فلوراید از آب آشامیدنی با استفاده از معادن سنگ معدن بوکسیت
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی
This work addresses three potential technical barriers to reliable removal of fluoride from drinking water with bauxite ore from Visakhapatnam, Andhra Pradesh, India. We evaluate competition from co-occurring ions, adsorption reversibility, and potability of the product water with regards to leaching of undesirable ions during treatment with various adsorbent materials including raw and thermally activated bauxite, and synthetic gibbsite (a simple model system). Under the conditions tested, the presence of phosphate significantly impacts fluoride adsorption capacity on all adsorbents. Sulfate impacts fluoride adsorption on gibbsite, but not on either bauxite adsorbent. Nitrate and silicate (as silicic acid), tested only with gibbsite, do not affect fluoride adsorption capacity. Both thermally activated bauxite and gibbsite show non-reversible adsorption of fluoride at a pH of 6. Raw bauxite leached arsenic and manganese in a TCLP leaching test at levels indicating the need for ongoing monitoring of treated water, but not precluding safe deployment of bauxite as a fluoride remediation technology. Understanding these phenomena is crucial to ensure field deployment over large diverse geographical areas with aquifers varying in groundwater composition, and for ensuring that the appropriate engineering processes are designed for field implementation of this innovation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Development Engineering - Volume 3, 2018, Pages 175-187
نویسندگان
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