通过膜电容去离子和电解增强鸟粪石生产:腐植酸和钙的干扰。

IF 2 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Aditya Kurnia Aji Pangestu, Arseto Yekti Bagastyo, Ervin Nurhayati, Jr-Lin Lin, Fahrudin Sidik
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引用次数: 0

摘要

本研究考察了在阳离子和有机物共存的情况下鸟粪石晶体形成对养分恢复的影响。采用牺牲镁阳极电解耦合膜电容去离子(MCDI)法制备了含铵、磷酸盐、钠、钙和腐植酸(HA)的合成废水中的鸟粪石晶体。这样,MCDI将共存阳离子吸附在活性炭(AC)电极上,并保留出水中的NH4+和PO43-离子。MCDI废水作为镁基电解的输入,使用AZ31B镁合金作为阳极释放Mg2+离子。在不存在和存在10 mM竞争离子和100 mg⋅L-1 HA的情况下,制备了不同初始氮/磷酸盐(N/P)摩尔比(即1:1、5:1和10:1)。结果表明,MCDI对NH4+和PO43-的截留率分别约为84.19%和78.07%,与交流电极的离子电吸附量相当,对NH4+和PO43-的截留量分别约为15.53 mg⋅g-1和21.45 mg⋅g-1。有趣的是,添加的co-ions,如Na+和Ca2+,可以保持2-5倍的NH4+和PO43-出水。镁基电解后,NH4+和PO43-离子分别增加了约87.32%和63.65%。在Na+存在的情况下,将MCDI与电解工艺偶联制得高纯度鸟粪石,产率高达0.6195 g。相反,HA和Ca2+显著降低晶体纯度和改变形态。在氮磷比为10:1、不含共离子和腐植酸的条件下,鸟粪石的回收能耗为15.88 Wh g-1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced struvite production via membrane capacitive deionization and electrolysis: interference of humic acid and calcium.

This study examined struvite crystal formation for nutrient recovery in the presence of coexisting cations and organic substances. Coupled membrane capacitive deionization (MCDI) with sacrificial magnesium anode electrolysis was performed to produce struvite crystals from synthetic wastewater containing ammonium, phosphate, sodium, calcium, and humic acid (HA). In this way, MCDI was employed to adsorb coexisting cations onto the activated carbon (AC) electrode and retain NH4+ and PO43- ions in the effluent. The MCDI effluent was the input for Mg-based electrolysis, which used an AZ31B Mg alloy as the anode to release Mg2+ ions. Various initial Nitrogen/Phosphate (N/P) molar ratios were prepared (i.e. 1:1, 5:1, and 10:1) in the absence and presence of 10 mM competitor ions and 100 mg⋅L-1 of HA. The results showed that MCDI can retain NH4+ and PO43- approximately 84.19 and 78.07%, respectively, which is equivalent to the ion electrosorption capacity of the AC electrode, approximately 15.53 mg⋅g-1 for NH4+ and 21.45 mg⋅g-1 for PO43-. Interestingly, the addition of co-ions, such as Na+ and Ca2+, can remain 2-5 times NH4+ and PO43- in the effluent. After Mg-based electrolysis, NH4+ and PO43- ions increased by approximately 87.32% and 63.65%, respectively. In the presence of Na+, coupling MCDI with the electrolysis process produced up to 0.6195 g of high-purity struvite. Conversely, HA and Ca2+ significantly reduced crystal purity and altered morphology. Under an N/P ratio of 10:1, without co-ions or humic acid, the energy consumption for struvite recovery was 15.88 Wh g-1.

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来源期刊
Environmental Technology
Environmental Technology 环境科学-环境科学
CiteScore
6.50
自引率
3.60%
发文量
0
审稿时长
4 months
期刊介绍: Environmental Technology is a leading journal for the rapid publication of science and technology papers on a wide range of topics in applied environmental studies, from environmental engineering to environmental biotechnology, the circular economy, municipal and industrial wastewater management, drinking-water treatment, air- and water-pollution control, solid-waste management, industrial hygiene and associated technologies. Environmental Technology is intended to provide rapid publication of new developments in environmental technology. The journal has an international readership with a broad scientific base. Contributions will be accepted from scientists and engineers in industry, government and universities. Accepted manuscripts are generally published within four months. Please note that Environmental Technology does not publish any review papers unless for a specified special issue which is decided by the Editor. Please do submit your review papers to our sister journal Environmental Technology Reviews at http://www.tandfonline.com/toc/tetr20/current
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