Environmental impact of desalination technologies: A review

被引:293
作者
Elsaid, Khaled [1 ]
Kamil, Mohammed [2 ]
Sayed, Enas Taha [3 ,4 ]
Abdelkareem, Mohammad Ali [3 ,4 ,5 ]
Wilberforce, Tabbi [6 ]
Olabi, A. [3 ,5 ]
机构
[1] Texas A&M Univ, Chem Engn Program, College Stn, TX 77843 USA
[2] Univ Sharjah, Dept Mech & Nucl Engn Dept, Sharjah 27272, U Arab Emirates
[3] Univ Sharjah, Ctr Adv Mat Res, Sharjah 27272W, U Arab Emirates
[4] Minia Univ, Dept Chem Engn, Fac Engn, Al Minya, Egypt
[5] Univ Sharjah, Dept Sustainable & Renewable Energy Engn, Sharjah 27272, U Arab Emirates
[6] Univ West Scotland, Inst Engn & Energy Technol, Paisley, Renfrew, Scotland
关键词
Desalination; Environmental impact; Reverse osmosis; Multi-stage flash distillation; Multi-effect distillation; REVERSE-OSMOSIS DESALINATION; OF-THE-ART; DISINFECTION BY-PRODUCTS; SEAWATER RO DESALINATION; WATER DESALINATION; OPTIMAL-DESIGN; CAPACITIVE DEIONIZATION; OPERATING-CONDITIONS; ENERGY-CONSUMPTION; SCALE INHIBITORS;
D O I
10.1016/j.scitotenv.2020.141528
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Due to the limited availability of freshwater supplies, desalination has become an increasingly reliable process for water supply worldwide, with proved technical and economic feasibility and advantages. Recently, desalination capacity significantly increased from approximately 35 million m(3) daily (MCM/day) in 2005 to about 95 MCM/day in 2018. Seawater desalination accounts for about 61% of global desalination capacity, while brackish water desalination accounts for 30%. Membrane desalination, mainly using reverse osmosis (RO), accounts for 3 / 4 of global desalination capacity, with the rest mostly used for thermal desalination using multi-stage flash distillation (MSF), and multi-effect distillation (MED). Despite the undeniable role of desali nation for securing water supply in areas where natural freshwater supplies are scarce, desalination impacts the natural environment at different aspects. Environmental impacts (EIs) of the desalination process are different and vary significantly according to the nature of the utilized feedwater, the desalination technology in use, and the management of waste brine generated. In this work, the EIs of each desalination technology were thoroughly investigated, with careful consideration given to different feedwater qualities, and various brine management techniques. Although the different aspects of desalination EIs have been extensively studied in the literature, the literature lacks comprehensive reviews and summaries of all the associated EIs. This article compiles the different EIs associated with the whole desalination process in one-hub, applying an intake-to-outfall approach. The leading desalination technologies of RO, MSF, and MED were analyzed, along with different feedwaters.This artide provides a mapping of the different technologies involving feedwater and brine management techniques and a detailed description of their impact on the environment. Finally, recommendations and conclusions were given to minimize the negative impacts of desalination on both the local and global environments. (C) 2020 Elsevier B.V. All rights reserved.
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页数:19
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