Influence of humic substances on the removal of pentachlorophenol by a biomimetic catalytic system with a water-soluble iron(III)-porphyrin complex.
Influence of humic substances on the removal of pentachlorophenol by a biomimetic catalytic system with a water-soluble iron(III)-porphyrin complex.
复制标题
腐殖质对水溶性铁（III）-卟啉复合物仿生催化系统去除五氯苯酚的影响。
DOI：
10.1021/es020681t
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发表时间：
2003
影响因子：
11.4
通讯作者：
M. Aoyama
中科院分区：
文献类型：
--
作者：
M. Fukushima;Akira Sawada;M. Kawasaki;H. Ichikawa;Kengo Morimoto;K. Tatsumi;M. Aoyama
为了研究仿生催化剂修复土壤的一些基本问题，研究了腐殖质(HSS)对五氯苯酚(PCP)等外来物质去除的影响。利用四(对磺基苯基)卟啉-铁(III)(Fe(III)-TPPS)和一过硫酸钾(KHSO5)的仿生催化体系，导致PCP的消失和脱氯。此外，几种类型的HSS的存在加强了这一过程。泥炭和堆肥土壤中添加HSS的增强程度(%Delta(PCP)60)大于其他类型的HSS(热带泥炭、棕树林和安多土壤)。在对照实验中，在仅存在KHSO5、仅存在Fe(III)-TPPS或HSS与KHSO5或Fe(III)-TPPS组合的情况下，没有观察到PCP的消失和脱氯。为了更好地了解添加HS在促进或抑制PCP消失方面的作用，研究了HSS的化学参数与%Delta(PCP)60之间的相关性。最有效的HSS具有较低的羧酸含量和较低的不饱和度。腐殖化程度越高，羧酸含量越高，不饱和度越高。因此，腐殖化程度较低的HSS可能更有利于促进Fe(III)-TPPS/KHSO5体系中PCP的消失。
To investigate some basic aspects of soil remediation using biomimetic catalysts, the effects of humic substances (HSs) on the removal of xenobiotics, such as pentachlorophenol (PCP), were investigated. The use of a biomimetic catalytic system using tetra(p-sulfophenyl)porphine-iron(III) (Fe(III)-TPPS) and potassium monopersulfate (KHSO5) resulted in the disappearance of PCP, accompanied by dechlorination. In addition, this process was enhanced by the presence of several types of HSs. The degrees of enhancement (% delta(PCP)60) achieved by the presence of HSs from peat and compost soils were larger than those in the presence of other types of HSs (tropical peat, brown forest, and ando soils). In control experiments, no PCP disappearance and dechlorination were observed in the presence of only KHSO5, only Fe(III)-TPPS, or combinations of HSs and either KHSO5 or Fe(III)-TPPS. To better understand the role of added HS in enhancing or inhibiting PCP disappearance, correlations between the chemical parameters of the HSs and % delta(PCP)60 were investigated. The most effective HSs had lower carboxylic acid contents and lower degrees of unsaturation. The carboxylic acid content and degree of unsaturation increase with the extent of humification. Therefore, HSs of a lower degree of humification would be predicted to be more useful in enhancing the disappearance of PCP in an Fe(III)-TPPS/KHSO5 system.