New Perspective into the Impact of Drying Pretreatment on Phosphorus Performance in Sediments

IF 6.4 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Current Pollution Reports Pub Date : 2024-04-08 DOI:10.1007/s40726-024-00305-x

Zhuoman Wu, Yuepeng Yin, Wenxi Pan, Jinyong Tang, Xi Cao, Wen Zhang

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Abstract

Purpose of Review

Different drying methods can cause errors in determining the content and evaluating the biological effectiveness of various forms of phosphorus (P) in sediment. The drying pretreatment effectively promotes the conversion of amorphous iron and aluminium oxides to their crystalline form, which ultimately impacts the adsorption capabilities of sediment. However, limited research has been conducted in this field previously. Sediments from the Weiyuan River, Baoenqiao Reservoir, and Honghu Lake in China were pretreated using freeze-drying, air-drying, and oven-drying methods. The effects of pretreatment methods on P were evaluated through P fractionation and isothermal adsorption experiments. The study also investigated the proportion and amount of amorphous iron and aluminium (Fe_ox and Al_ox) transformed into crystalline forms.

Recent Findings

The results revealed that drying pretreatment markedly increased the potentially bioavailable P(BAP) (6.73%). This increase can be attributed to the rise in loosely-bound P (48.30%) and P bound to metal oxides (9.51%), which are predominant contributors to BAP. Furthermore, sediment adsorption performance significantly decreases after drying pretreatment. This is due to the reduced content of Fe_ox (64.02%) and Al_ox (36.61%), which exhibit higher P adsorption capacity. Additionally, drying led to a significant reduction in SP_max (25.09%) and PSI (28.20%), along with an increase in EPC₀ (24.96%) and DPS (6.83%).

Summary

Different drying treatments affected the P forms and sorption properties of the sediment to varying degrees, with the overall effect being oven-drying > air-drying > freeze-drying > fresh samples. Consequently, when fresh sediment is not available for laboratory analysis, freeze-drying may be a more realistic method for characterizing P properties.

Graphical Abstract

Abstract Image

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干燥预处理对沉积物磷性能影响的新视角

综述目的不同的干燥方法会导致在确定沉积物中各种形式磷（P）的含量和评估其生物有效性时出现误差。干燥预处理可有效促进无定形的铁和铝氧化物转化为结晶形态，最终影响沉积物的吸附能力。然而，此前在这一领域开展的研究十分有限。研究人员采用冷冻干燥法、空气干燥法和烘箱干燥法对中国威远河、宝恩桥水库和洪湖的沉积物进行了预处理。通过磷分馏和等温吸附实验评估了预处理方法对磷的影响。研究还调查了无定形的铁和铝（Feox 和 Alox）转化为结晶形式的比例和数量。这种增加可归因于松散结合的 P（48.30%）和与金属氧化物结合的 P（9.51%）的增加，而这两种物质是 BAP 的主要贡献者。此外，经过干燥预处理后，沉积物的吸附性能明显下降。这是由于表现出较高磷吸附能力的 Feox（64.02%）和 Alox（36.61%）含量减少所致。此外，干燥还导致 SPmax（25.09%）和 PSI（28.20%）显著降低，同时 EPC0（24.96%）和 DPS（6.83%）增加。小结不同的干燥处理方法对沉积物的 P 形态和吸附特性有不同程度的影响，总体影响为烘箱干燥> 空气干燥> 冷冻干燥> 新鲜样品。因此，当无法对新鲜沉积物进行实验室分析时，冷冻干燥可能是表征磷特性的更现实的方法。图表摘要

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来源期刊

Current Pollution Reports Environmental Science-Water Science and Technology

CiteScore

12.10

自引率

1.40%

发文量

期刊介绍： Current Pollution Reports provides in-depth review articles contributed by international experts on the most significant developments in the field of environmental pollution.By presenting clear, insightful, balanced reviews that emphasize recently published papers of major importance, the journal elucidates current and emerging approaches to identification, characterization, treatment, management of pollutants and much more.