紫外活化过硼酸钠工艺(UV/SPB)去除水中腐植酸

A. Ibrahim
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引用次数: 1

摘要

腐植酸(HA)具有复杂的化学成分,能够与水体中的有机和无机污染物螯合、吸附和交换离子,使水质恶化,对人类健康和环境构成威胁。研究了紫外活化过硼酸钠(UV/SPB)共生去除水中腐植酸的方法。研究了腐植酸的主要协同降解过程,以及起始腐植酸浓度、过硼酸钠剂量和初始pH值对腐植酸消除的影响。结果表明,单紫外光法和单过硼酸钠法对腐植酸的去除率分别为0.5%和1.5%。UV/SPB法对腐植酸的去除率为88.83%。用自由基来掩盖腐植酸的实验表明,腐植酸去除的主要催化剂是由过硼酸钠活化产生的羟基自由基。激发-发射矩阵光谱、紫外-可见吸收(UV- vis)光谱、吸光度比值、特定紫外-可见吸光度值(SUVA)和UV/SPB方法性能结果表明,UV/SPB方法具有降解和矿化腐植酸的能力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Ultraviolet-activated sodium perborate process (UV/SPB) for removing humic acid from water
Humic acid (HA) has a complex chemical composition and the ability to chelate, adsorb, and exchange ions with organic and inorganic contaminants in bodies of water, which worsens water quality and poses a threat to human health and the environment. In this research, an Ultraviolet-activated sodium perborate (UV/SPB) symbiotic method (UV/SPB) was developed to eliminate humic acid in water. The major synergistic and degradative processes of the humic acid were investigated, as well as the impact of the starting humic acid concentration, sodium perborate dose, and primary pH value on the humic acid elimination. Results indicate that just 0.5 % and 1.5 % of humic acid were eliminated mostly by sole UV and sole sodium perborate (SPB) methods, respectively. More effectively than other methods, UV/SPB removed humic acid with an efficiency of 88.83%. An experiment using free radicals to mask them revealed that the primary catalyst for humic acid removal is the hydroxyl radical generated by sodium perborate activation. The excitation-emission matrix spectroscopy, Ultraviolet-visible absorption (UV-Vis) spectrum, absorbance ratio values, specific Ultraviolet-visible absorbance values (SUVA), and UV/SPB method performance findings demonstrated the UV/SPB method's capability to degrade and mineralize humic acid.
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