کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6968748 | 1453012 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Boron evaporation in thermally-driven seawater desalination: Effect of temperature and operating conditions
ترجمه فارسی عنوان
تبخیر بور در شستشوی دریایی با آب گرم: اثر دما و شرایط عملیاتی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
چکیده انگلیسی
The volatilization of boron in thermal desalination processes, namely multi-stage flash (MSF) and air-gap membrane distillation (AGMD) was investigated for the first time. This phenomenon was observed at feed temperatures above 55â¯Â°C in both studied processes. In simulated MSF process with two feeds, model boric acid and Red Sea water, boron concentration in distillate increased with feed temperature increase from 55â¯Â°C to 104â¯Â°C because of the increase in boric acid vapor pressure. Salinity and pH were the main factors controlling boron evaporation. The achieved boron concentrations in simulated MSF process were consistent with those measured in distillate samples collected from commercial MSF plants. The AGMD process also revealed a strong influence of operating temperature on boron removal. However, unlike MSF process, the boron concentration in AGMD permeate decreased with the feed temperature increase from 55â¯Â°C to 80â¯Â°C due probably to increase in vapor production and corresponding permeate dilution. When AGMD was operated in concentrating mode at a constant feed temperature of 80â¯Â°C, permeate boron concentration increased with process time due to concentration polarization and membrane fouling. A 10% flux decline observed after 21â¯h was attributed to CaCO3 scaling on the membrane surface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 351, 5 June 2018, Pages 224-231
Journal: Journal of Hazardous Materials - Volume 351, 5 June 2018, Pages 224-231
نویسندگان
A. Alpatova, A. Alsaadi, N. Ghaffour,