Adsorption of Phosphorus Infiltrating Andosol in Aso Caldera, Kumamoto

Q3 Environmental Science

Journal of Water and Environment Technology Pub Date : 2020-01-01 DOI:10.2965/jwet.19-068

Daisuke Yumioka, T. Hama, K. Kitamura, S. Hatate, Hiroaki Ito, Y. Kawagoshi

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引用次数: 1

Abstract

High concentration (more than 1.0 mgP/L) of phosphorus was detected in groundwater in Aso caldera, Kumamoto. The fact indicates phosphorus can be transported by groundwater flows. The objective of this study is to clarify the characteristics of paddy soil (Andosol) in phosphorus adsorption process. Adsorption capacity of the Andosol was evaluated by continuously-flowing system using the soil column. In addition, soil phosphorus was categorized into five fractions; water-extractable phosphorus (Water-P), phosphorus extracted by sodium bicarbonate and sodium dithionate (DB-P), phosphorus extracted by sodium hydroxide (NaOH-P), phosphorus extracted by hydrochloric acid (HCl-P) and residual phosphorus (Res-P). As a result, it is confirmed that the flow rate of water is an important factor to control the phosphorus adsorption by the Andosol. The lower the flow rate is, the more phosphorus is adsorbed on the upstream soil. On the other hand, when the flow rate was high, phosphorus was evenly distributed in column soil. In addition, the fraction of NaOH-P accounted for 52% of the adsorbed phosphorus, suggesting that NaOH-P is the most important fraction which controls phosphorus adsorption to Andosol.

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熊本阿索火山口土溶胶对磷的吸附研究

熊本阿苏火山口地下水中磷含量超标(超过1.0 mgP/L)。这一事实表明，磷可以通过地下水输送。本研究的目的是阐明水稻土(Andosol)在磷吸附过程中的特性。采用土柱连续流动系统评价了安多酚的吸附能力。此外，将土壤磷划分为5个组分;水提磷(Water-P)、碳酸氢钠和二硫酸钠提磷(DB-P)、氢氧化钠提磷(NaOH-P)、盐酸提磷(HCl-P)和残磷(Res-P)。结果表明，水的流速是控制安多溶胶吸附磷的重要因素。流量越小，上游土壤吸附的磷越多。另一方面，当流量较大时，磷在柱状土中分布均匀。此外，NaOH-P占吸附磷的52%，表明NaOH-P是控制磷对安多溶胶吸附的最重要组分。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Water and Environment Technology Environmental Science-Water Science and Technology

CiteScore

1.80

自引率

0.00%

发文量

审稿时长

43 weeks

期刊介绍： The Journal of Water and Environment Technology is an Open Access, fully peer-reviewed international journal for all aspects of the science, technology and management of water and the environment. The journal’s articles are clearly placed in a broader context to be relevant and interesting to our global audience of researchers, engineers, water technologists, and policy makers. JWET is the official journal of the Japan Society on Water Environment (JSWE) published in English, and welcomes submissions that take basic, applied or modeling approaches to the interesting issues facing the field. Topics can include, but are not limited to: water environment, soil and groundwater, drinking water, biological treatment, physicochemical treatment, sludge and solid waste, toxicity, public health and risk assessment, test and analytical methods, environmental education and other issues. JWET also welcomes seminal studies that help lay the foundations for future research in the field. JWET is committed to an ethical, fair and rapid peer-review process. It is published six times per year. It has two article types: Original Articles and Review Articles.