Chemical cleaning protocols for thin film composite (TFC) polyamide forward osmosis membranes used for municipal wastewater treatment
Chemical cleaning protocols for thin film composite (TFC) polyamide forward osmosis membranes used for municipal wastewater treatment
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用于城市废水处理的薄膜复合 (TFC) 聚酰胺正向渗透膜的化学清洗方案
DOI：
10.1016/j.memsci.2014.10.032
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发表时间：
2015-02
影响因子：
9.5
通讯作者：
Zhichao Wu
中科院分区：
文献类型：
--
作者：
Chaowei Zhu;Ying Dong;Qiaoying Wang;Zhichao Wu
最近，薄膜复合（TFC）聚酰胺正渗透（FO）膜因其潜在的水和能源相关应用而受到关注。TFC FO膜已显示出比三乙酸纤维素（CTA）FO膜实现更高的水通量和更好的溶质截留。膜广泛使用的主要障碍之一是在长期过滤过程如废水处理期间发生的不可逆污染。TFC FO膜的适当化学清洗方案的开发是实现FO工艺可持续运行的关键。在这项研究中，处女膜样品暴露于化学清洗剂，以确定其对膜性能的影响。此外，通过测量污染膜样品的化学清洗之后的水通量的变化来研究所选化学试剂的水通量恢复效率。将TFC膜暴露于商业清洁剂（0.8%EDTA和1%Alconox混合物）导致水和溶质通量的急剧增加。碱浸泡导致的相对水和溶质通量略有增加，而酸暴露导致这些通量的减少。还发现Alconox暴露引起的膜性质变化是不可逆的，而碱性暴露的影响是可逆的，表明Alconox暴露对TFC膜造成损害。然后开发了各种清洁方案，并在废水污染的TFC膜上进行了测试。结果表明，使用0.1% NaOH/0.1%十二烷基硫酸钠（SDS）混合物清洗，然后用2%柠檬酸或0.5%盐酸酸洗是最有效的清洗策略。
Recently, thin film composite (TFC) polyamide forward osmosis (FO) membranes have received attention for their potential water- and energy-related applications. TFC FO membranes have been shown to achieve both higher water flux and better solute rejection than cellulose triacetate (CTA) FO membranes. One of the major obstacles in widespread membrane use is the irreversible fouling that occurs during long-term filtration processes such as wastewater treatment. The development of proper chemical cleaning protocols for TFC FO membranes holds the key to achieving sustainable operation of FO processes. In this study, virgin membrane samples were exposed to chemical cleaning agents to determine their effects on membrane properties. In Addition, the water flux recovery efficiency of selected chemical agents was investigated by measuring the change in water flux following chemical cleaning of fouled membrane samples. Exposure of TFC membranes to commercial cleaning detergents (0.8% EDTA and 1% Alconox mixture) resulted in a dramatic increase in water and solute fluxes. Alkaline soaking led to a slight increase in the relative water and solute fluxes, while acid exposure led to a decrease in these fluxes. It was also found that the changes in membrane properties caused by Alconox exposure were irreversible, while the impacts of alkaline exposure were reversible, demonstrating that the Alconox exposure caused damage to TFC membranes. Various cleaning protocols were then developed and tested on wastewater-fouled TFC membranes. Results indicate that the use of 0.1% NaOH/0.1% sodium dodecyl sulfate (SDS) mixture cleaning followed by acid cleaning with either 2% citric acid or 0.5% HCl was the most effective cleaning strategy.
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DOI：
10.12989/mwt.2012.3.3.169
发表时间：
2012-07
期刊：
Membrane Water Treatment
影响因子：
--
作者：
Lucinda F. Silva;R. C. Michel;C. P. Borges
通讯作者：
Lucinda F. Silva;R. C. Michel;C. P. Borges
影响因子：
9.5
作者：
Lee, Sangyoup;Boo, Chanhee;Hong, Seungkwan
通讯作者：
Hong, Seungkwan
DOI：
10.1016/b978-0-12-816777-9.00001-0
发表时间：
2020-01-01
期刊：
CURRENT TRENDS AND FUTURE DEVELOPMENTS ON (BIO-) MEMBRANES: REVERSE AND FORWARD OSMOSIS: PRINCIPLES, APPLICATIONS, ADVANCES
影响因子：
--
作者：
Rastogi, Navin K.
通讯作者：
Rastogi, Navin K.
影响因子：
1.1
作者：
Linares, Rodrigo Valladares;Li, Zhenyu;Amy, Gary
通讯作者：
Amy, Gary
影响因子：
9.5
作者：
Tiraferri, Alberto;Yip, Ngai Yin;Elimelech, Menachem
通讯作者：
Elimelech, Menachem