Phytoremediation of salt-affected soils: a review of processes, applicability, and the impact of climate change
Phytoremediation of salt-affected soils: a review of processes, applicability, and the impact of climate change
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DOI：
10.1007/s11356-015-4205-4
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发表时间：
2015-05-01
影响因子：
5.8
通讯作者：
Borges, Maria-Teresa
中科院分区：
文献类型：
--
作者：
Jesus, Joao M.;Danko, Anthony S.;Borges, Maria-Teresa
土壤盐碱化影响着全世界10亿至100亿公顷的土地，威胁着养活不断增加的世界人口所需的农业生产。植物修复可能是修复这些土壤的一种具有成本效益的选择。本文分析了利用植物修复受盐影响的土壤的可行性，并探讨了修复机制。此外，它具体解决了辩论植物间接（通过土壤阳离子交换增强）或直接（通过吸收）盐修复的作用。电导率（ECe）+钠吸附比（SAR）减少和植物盐吸收的实验数据分析表明，盐植物修复和其他处理方案之间的去除效率相似，与非浸出条件下的植物提取的额外潜力。一个重点也给出了最近的研究表明，增加盐植物提取，与其他污染物的共处理，和盐流控制的植物修复适用性的潜在途径。最后，这项工作还详细介绍了气候变化对土壤盐碱化和处理方案的预测影响。极端气候事件和盐碱化的协同效应是未来植物修复应用的一个具有挑战性的障碍，这将需要更多的多学科研究工作。
Soil salinization affects 1-10 billion ha worldwide, threatening the agricultural production needed to feed the ever increasing world population. Phytoremediation may be a cost-effective option for the remediation of these soils. This review analyzes the viability of using phytoremediation for salt-affected soils and explores the remedial mechanisms involved. In addition, it specifically addresses the debate over plant indirect (via soil cation exchange enhancement) or direct (via uptake) role in salt remediation. Analysis of experimental data for electrical conductivity (ECe) + sodium adsorption ratio (SAR) reduction and plant salt uptake showed a similar removal efficiency between salt phytoremediation and other treatment options, with the added potential for phytoextraction under non-leaching conditions. A focus is also given on recent studies that indicate potential pathways for increased salt phytoextraction, co-treatment with other contaminants, and phytoremediation applicability for salt flow control. Finally, this work also details the predicted effects of climate change on soil salinization and on treatment options. The synergetic effects of extreme climate events and salinization are a challenging obstacle for future phytoremediation applications, which will require additional and multi-disciplinary research efforts.