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Journal ArticleDOI

Remediation of Heavy Metal-Polluted Agricultural Soils Using Clay Minerals: A Review

01 Apr 2017-Pedosphere (Elsevier)-Vol. 27, Iss: 2, pp 193-204
TL;DR: In this paper, the application of clay minerals for the remediation of heavy metal-polluted agricultural soils is summarized, in terms of their remediation effects and mechanisms, influencing factors, and future focus.
About: This article is published in Pedosphere.The article was published on 2017-04-01. It has received 228 citations till now. The article focuses on the topics: Environmental remediation & Soil contamination.
Citations
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Journal ArticleDOI
TL;DR: This review discussed remediation of PTEs contaminated soils through immobilization techniques using different soil amendments with respect to type of element, soil, and amendment, immobilization efficiency, underlying mechanisms, and field applicability.

630 citations

Journal ArticleDOI
TL;DR: In this article, a review of studies involving the use of clay minerals for the remediation of soils and water contaminated with heavy metals is presented, highlighting the properties of clay materials which make them good adsorbents and the processes necessary for adsorption to take place.
Abstract: Clay minerals are affordable, abundant, naturally occurring minerals found in many parts of the world that have been used effectively for remediation of many contaminants. This review article is aimed at studies involving the use of clay minerals for the remediation of soils and water contaminated with heavy metals. All relevant scientific literature using science direct online database from the year 2000 till 2019 were evaluated. The review highlighted the properties of clay minerals which make them good adsorbents and the processes necessary for adsorption to take place. It revealed that clay minerals are quite effective for remediation purposes, confirmed that clay minerals are very affordable, reliable, and environmentally friendly remediation materials for heavy metal contaminated media. Also, several methods are available for the modification of clay minerals in order to increase their adsorption capacity. However, in order to establish the use of clay minerals as heavy metal remediation materials compared to other established methods, more investigations are required, to determine the best modification type for clay minerals as well as the standard dosage of clay minerals required for the adsorption of heavy metals.

166 citations

Journal ArticleDOI
TL;DR: Chromium pollution is a significant environmental threat, severely impacting our environment and natural resources, especially water and soil, and a sustainable remediation approach must be adopted to balance the environment and nature.

156 citations

Journal ArticleDOI
TL;DR: In this paper, an overview of the use of biochar in the immobilization of heavy metal (HM)-contaminated soils to reduce HM bioavailability to plants is presented, including the specific soil HM immobilization mechanisms, longterm beneficial effects, and potential environmental risks associated with BC application.

118 citations

Journal ArticleDOI
TL;DR: The results suggest that the bamboo-based biochar/montmorillonite composite can be used effectively in the treatment of industrial effluents or waste water containing anionic pollutants such as nitrates.

106 citations

References
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Journal ArticleDOI
TL;DR: This review article comprehensively discusses the background, concepts and future trends in phytoremediation of heavy metals.

2,718 citations

Journal ArticleDOI
TL;DR: The remediation of heavy metal(loid) contaminated soils through manipulating their bioavailability using a range of soil amendments will be presented.

1,507 citations

Journal ArticleDOI
TL;DR: An overview of data published during the last five years on the immobilization of one metalloid, As, and four heavy metals, Cr, Cu, Pb and Zn, in soils, finds that Zn can be successfully immobilized in soil by phosphorus amendments and clays.

1,437 citations

Journal ArticleDOI
TL;DR: Comparisons with other regions of the world show that the current status of soil contamination, based on the total contaminant concentrations, is not worse in China, however, the concentrations of some heavy metals in Chinese soils appear to be increasing at much greater rates.
Abstract: China faces great challenges in protecting its soil from contamination caused by rapid industrialization and urbanization over the last three decades. Recent nationwide surveys show that 16% of the soil samples, 19% for the agricultural soils, are contaminated based on China’s soil environmental quality limits, mainly with heavy metals and metalloids. Comparisons with other regions of the world show that the current status of soil contamination, based on the total contaminant concentrations, is not worse in China. However, the concentrations of some heavy metals in Chinese soils appear to be increasing at much greater rates. Exceedance of the contaminant limits in food crops is widespread in some areas, especially southern China, due to elevated inputs of contaminants, acidic nature of the soil and crop species or cultivars prone to heavy metal accumulation. Minimizing the transfer of contaminants from soil to the food chain is a top priority. A number of options are proposed, including identification of the sources of contaminants to agricultural systems, minimization of contaminant inputs, reduction of heavy metal phytoavailability in soil with liming or other immobilizing materials, selection and breeding of low accumulating crop cultivars, adoption of appropriate water and fertilizer management, bioremediation, and change of land use to grow nonfood crops. Implementation of these strategies requires not only technological advances, but also social-economic evaluation and effective enforcement of environmental protection law.

1,357 citations

Journal ArticleDOI
TL;DR: The feasibility of using two important and common clay minerals, kaolinite and montmorillonite, as adsorbents for removal of toxic heavy metals has been reviewed.

1,283 citations