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首页> 外文期刊>Environmental engineering and management journal >EFFECT OF TEMPERATURE CONDITIONS ON Cu, Ni, Zn AND Fe COMPLEXATION BY HUMIC SUBSTANCES DURING SEWAGE SLUDGE COMPOSTING
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EFFECT OF TEMPERATURE CONDITIONS ON Cu, Ni, Zn AND Fe COMPLEXATION BY HUMIC SUBSTANCES DURING SEWAGE SLUDGE COMPOSTING

机译：污泥合成过程中温度条件对腐殖质对铜，镍，锌和铁络合的影响

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摘要

The aim of this study was to determine how temperature conditions (max. 72℃, 81℃ and 43.5℃) during sewage sludge composting affect the distribution of organically bound heavy metals in humic substances (HS). To accomplish this, the content of Cu, Ni, Zn and Fe was measured in the two main fractions of HS, humic acids (HAs) and the fulvic fraction (FF). In the feedstock, the FF was mainly responsible for binding all metals except Ni. During composting in the two series with thermophilic conditions, the content of Cu and Ni in HAs increased considerably. However, in the third series this increase did not take place. Zn content in HAs nearly doubled in the first two series, but 92-94% of Zn still remained in the FF. Although Cu, Ni, and Zn content in stable-HAs increased in all three series, the increase was much greater in the two series with higher temperatures. Fe distribution was not affected by composting. These results may indicate that thermophilic conditions during composting of sewage sludge should be favored to reduce the risk of heavy metal pollution when it is used as a soil amendment.
机译：这项研究的目的是确定污水污泥堆肥过程中的温度条件（最高72℃，81℃和43.5℃）如何影响腐殖质（HS）中有机结合重金属的分布。为此，测量了HS的两个主要馏分中的铜，镍，锌和铁的含量，腐殖酸（HAs）和黄腐质分数（FF）。在原料中，FF主要负责结合除Ni外的所有金属。在具有高温条件的两个系列的堆肥过程中，HA中的Cu和Ni含量显着增加。但是，在第三系列中，这种增加没有发生。在前两个系列中，HA中的锌含量几乎翻了一番，但FF中仍残留92-94％的锌。尽管在稳定的HAs中，所有三个系列中的Cu，Ni和Zn含量均增加，但随着温度的升高，两个系列中的含量增加幅度更大。铁的分布不受堆肥的影响。这些结果可能表明，污水污泥堆肥过程中的高温条件应有利于降低重金属污染的风险，当其用作土壤改良剂时。

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