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ECOLOGICAL TREATMENT OF MEA AQUEOUS SOLUTION USING A HYDROPONIC METHOD

机译：水培法的MEA水溶液生态处理

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摘要

In the CO _( 2 ) chemical absorption process, a CO _( 2 ) absorbent may be released into air directly through absorbent volatilization and discharged into water body through absorbent leakage, with both leading to the potential pollutions of the air and water environment. In the present study, a new ecological treatment of monoethanolamine (MEA), a widely used solvent in the chemical absorption process, was proposed using lettuce hydroponics. An aqueous MEA solution was firstly CO _( 2 ) -saturated to reduce its pH value to about 7, and then the CO _( 2 ) -rich MEA solution was mixed with a chemical nutrition solution to act as the hydroponic liquid for lettuce cultivation. The feasibility of ecological treatment of MEA by lettuce hydroponics was investigated in terms of the phytotoxicity of MEA and characteristics of the hydroponic lettuce, followed by screening the optimal MEA concentration. The results showed that the phytotoxicity of MEA increases with MEA concentration. Generally, the phytotoxicity of MEA is relatively low. The MEA concentration causing 50% inhibition rate of root growth (EC _( 50 ) ) is about 0.012 mol/L, implying that the maximum MEA concentration suitable for ecological treatment should be less than 0.012 mol/L. In terms of the external quality, agronomic trait and physiological characteristic of hydroponic lettuce cultivated in hydroponic liquids containing MEA, the growth of lettuce is improved at some MEA concentrations when compared to the lettuce cultivated in a chemical nutrition liquid, including more active lettuce life, stronger substance assimilation capacity, higher apparent quality and lettuce yield. In short, ecological treatment of MEA on the basis of the hydroponic method is feasible, and the promising concentration of MEA is 0.001 mol-MEA/L.
机译：在CO _（2）化学吸收过程中，可以通过吸收性挥发直接通过吸收性裂化将CO _（2）吸收剂直接释放到空气中，并通过吸收泄漏排放到水体中，这两者都导致空气和水环境的潜在污染。在本研究中，使用莴苣水培，提出了一种新的生态治疗单乙醇胺（MEA），在化学吸收过程中广泛使用的溶剂。将水性MEA溶液首先是CO_（2） - 饱和，以将其pH值降低至约7，然后将CO _（2） - rich MEA溶液与化学营养溶液混合，以充当莴苣栽培的水培液。在MEA的植物毒性和水培生菜的特征方面研究了生态治疗MEA的生态治疗的可行性，然后通过筛选最佳的MEA浓度。结果表明，MEA的植物毒性随MEA浓度而增加。通常，MEA的植物毒性相对较低。导致生长50％抑制率（EC _（50））的MEA浓度约为0.012 mol / L，这意味着适合于生态处理的最大MEA浓度应小于0.012 mol / l。就含有MEA的水培液体栽培的外部质量，农艺性状和生理特性，与化学营养液中栽培的生菜相比，在一些MEA浓度下，莴苣的生长得到改善，包括更活跃的莴苣生活，较强的物质同化能力，表观质量越高，莴苣产量。简而言之，在水培方法的基础上，MEA的生态处理是可行的，并且MEA的有希望的浓度为0.001 mol-Mea / L.

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  • 来源
    《Clean air》 |2018年第4期|143-155|共13页
  • 作者

    Feihong Liang; Te Tu; Ge Yu; Wenchao Wang; Qingyao He; Shuiping Yan; Yi Ran;

  • 作者单位

    College of Engineering Huazhong Agricultural University|Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture;

    College of Engineering Huazhong Agricultural University|Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture;

    College of Engineering Huazhong Agricultural University|Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture;

    College of Engineering Huazhong Agricultural University|Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture;

    College of Engineering Huazhong Agricultural University|Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture;

    College of Engineering Huazhong Agricultural University|Key Laboratory of Agricultural Equipment in Mid-lower Yangtze River Ministry of Agriculture;

    Biogas Institute of Ministry of Agriculture|Key Laboratory of Technology and Model for Cyclic Utilization fromAgricultural Resources Ministry of Agriculture;

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  • 正文语种 eng
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  • 关键词

    MEA disposal; MEA volatilization; COlt; subgt; 2lt; /subgt; capture; lettuce hydroponics;

    机译：MEA处理;MEA挥发;CO＆lt;亚＆gt;2＆lt;/ sub＆gt;捕获;莴苣水培;

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