Phosphorus-Sorption Characteristics of Calcareous Soils in Arid and Semi Arid Regions

K. Mashal, M. Al-Qinna, Jwan H. Ibbini
{"title":"Phosphorus-Sorption Characteristics of Calcareous Soils in Arid and Semi Arid Regions","authors":"K. Mashal, M. Al-Qinna, Jwan H. Ibbini","doi":"10.5383/swes.03.01.009","DOIUrl":null,"url":null,"abstract":"Understanding of phosphorus (P) sorption and desorption by soils is important for water quality. The objectives of this study are to: (1) estimate P-sorption parameters of calcareous soils; and (2) determine the factors affecting P sorption and the relation between equilibrium P concentration at zero-net P sorption (EPCo) and soil parameters. In this study selected samples of calcareous soils (CaCO3 % 34-60) were collected from the Al-Hashemiya area. Phosphorus sorption isotherms covering a wide concentration range of phosphate (0-500 mg/L phosphate) were determined at room temperature by batch experiments. The results indicate that as the P concentration in solution increased, the slope of the sorption isotherm changed abruptly. The abrupt change in slope of the sorption isotherms suggests that P precipitation at the carbonate surface began to dominate the process as concentrations increased beyond that of the point of inflection. Sorption isotherm results showed that these soils best fit Freundlich isotherm. Both Pearson correlation matrix and stepwise regression models indicated that Fe-oxide and soil cation exchange capacity (CEC) are the most significant effective (P<0.05) predictors on P availability and occurrence in calcareous soils, while carbonate content, soil pH, EC, and OM content were insignificant on P availability","PeriodicalId":144804,"journal":{"name":"International Journal of Sustainable Water and Environmental Systems","volume":"68 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Sustainable Water and Environmental Systems","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.5383/swes.03.01.009","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

Abstract

Understanding of phosphorus (P) sorption and desorption by soils is important for water quality. The objectives of this study are to: (1) estimate P-sorption parameters of calcareous soils; and (2) determine the factors affecting P sorption and the relation between equilibrium P concentration at zero-net P sorption (EPCo) and soil parameters. In this study selected samples of calcareous soils (CaCO3 % 34-60) were collected from the Al-Hashemiya area. Phosphorus sorption isotherms covering a wide concentration range of phosphate (0-500 mg/L phosphate) were determined at room temperature by batch experiments. The results indicate that as the P concentration in solution increased, the slope of the sorption isotherm changed abruptly. The abrupt change in slope of the sorption isotherms suggests that P precipitation at the carbonate surface began to dominate the process as concentrations increased beyond that of the point of inflection. Sorption isotherm results showed that these soils best fit Freundlich isotherm. Both Pearson correlation matrix and stepwise regression models indicated that Fe-oxide and soil cation exchange capacity (CEC) are the most significant effective (P<0.05) predictors on P availability and occurrence in calcareous soils, while carbonate content, soil pH, EC, and OM content were insignificant on P availability
干旱半干旱区钙质土壤磷吸附特性研究
了解土壤对磷的吸附和解吸对水质具有重要意义。本研究的目的是:(1)估算钙质土壤的磷吸附参数;(2)确定影响磷吸收的因素以及零净磷吸收平衡磷浓度与土壤参数的关系。在这项研究中,从Al-Hashemiya地区收集了石灰质土壤样品(CaCO3 % 34-60)。通过批量实验,在室温下测定了磷的吸附等温线,该等温线覆盖了较宽的磷酸盐浓度范围(0 ~ 500 mg/L)。结果表明,随着溶液中磷浓度的增加,吸附等温线的斜率发生突变。吸附等温线斜率的突变表明,当浓度超过拐点时,碳酸盐表面的P降水开始占主导地位。吸附等温线结果表明,这些土壤最符合Freundlich等温线。Pearson相关矩阵和逐步回归模型均表明,Fe-oxide和土壤阳离子交换容量(CEC)是钙质土壤磷有效性和赋存状态的最显著预测因子(P<0.05),而碳酸盐含量、土壤pH、EC和OM含量对磷有效性的影响不显著
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
自引率
0.00%
发文量
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信