A review on in situ phytoremediation of mine tailings.
TL;DR: In this review, the background, concepts and applications of phytoremediation are comprehensively discussed, and proper amendments used to improve the physical, chemical and biological properties of mine tailings are systematically reviewed and compared.
About: This article is published in Chemosphere.The article was published on 2017-10-01. It has received 336 citations till now. The article focuses on the topics: Tailings & Phytoremediation.
Citations
More filters
TL;DR: In this review, recent advances in AMD prevention techniques like oxygen barriers, utilization of bactericides, co-disposal and blending, and passivation of sulfide minerals are discussed and recycling of mine tailings as construction and geopolymer materials to reduce the amounts of wastes for disposal are introduced.
384 citations
01 Jul 2020
TL;DR: In this paper, the authors examine processes that can lead to the contamination of agricultural land with heavy metal(loid)s, which range from mine tailings runoff entering local irrigation channels to the atmospheric deposition of incinerator and coal-fired power-plant emissions.
Abstract: Agricultural soil is a non-renewable natural resource that requires careful stewardship in order to achieve the United Nations’ Sustainable Development Goals However, industrial and agricultural activity is often detrimental to soil health and can distribute heavy metal(loid)s into the soil environment, with harmful effects on human and ecosystem health In this Review, we examine processes that can lead to the contamination of agricultural land with heavy metal(loid)s, which range from mine tailings runoff entering local irrigation channels to the atmospheric deposition of incinerator and coal-fired power-plant emissions We discuss the relationship between heavy metal(loid) biogeochemical transformations in the soil and their bioavailability We then review two biological solutions for remediation of contaminated agricultural land, plant-based remediation and microbial bioremediation, which offer cost-effective and sustainable alternatives to traditional physical or chemical remediation technologies Finally, we discuss how integrating these innovative technologies with profitable and sustainable land use could lead to green and sustainable remediation strategies, and conclude by identifying research challenges and future directions for the biological remediation of agricultural soils Contamination of agricultural soils by heavy metals and metalloids has severe consequences on human and ecosystem health This Review discusses the sources of heavy metal(loid) contamination, the mechanisms by which these contaminants interact with biological and geochemical soil elements, and plant-based and microorganism-based remediation strategies
373 citations
TL;DR: This review focused on three basic HM phytoextraction strategies that differ in the type of plant species being employed: natural hyperaccumulators, fast-growing plant species with high-biomass production and, potentially, plants genetically engineered toward a phenotype that favors efficient HM uptake and boosted HM tolerance.
Abstract: Pollution by heavy metals (HM) represents a serious threat for both the environment and human health. Due to their elemental character, HM cannot be chemically degraded, and their detoxification in the environment mostly resides either in stabilization in situ or in their removal from the matrix, e.g., soil. For this purpose, phytoremediation, i.e., the application of plants for the restoration of a polluted environment, has been proposed as a promising green alternative to traditional physical and chemical methods. Among the phytoremediation techniques, phytoextraction refers to the removal of HM from the matrix through their uptake by a plant. It possesses considerable advantages over traditional techniques, especially due to its cost effectiveness, potential treatment of multiple HM simultaneously, no need for the excavation of contaminated soil, good acceptance by the public, the possibility of follow-up processing of the biomass produced, etc. In this review, we focused on three basic HM phytoextraction strategies that differ in the type of plant species being employed: natural hyperaccumulators, fast-growing plant species with high-biomass production and, potentially, plants genetically engineered toward a phenotype that favors efficient HM uptake and boosted HM tolerance. Considerable knowledge on the applicability of plants for HM phytoextraction has been gathered to date from both lab-scale studies performed under controlled model conditions and field trials using real environmental conditions. Based on this knowledge, many specific applications of plants for the remediation of HM-polluted soils have been proposed. Such studies often also include suggestions for the further processing of HM-contaminated biomass, therefore providing an added economical value. Based on the examples presented here, we recommend that intensive research be performed on the selection of appropriate plant taxa for various sets of conditions, environmental risk assessment, the fate of HM-enriched biomass, economical aspects of the process, etc.
262 citations
Cites background from "A review on in situ phytoremediatio..."
...Ever since, a vast number of studies have focused on the employment of various plant species for the removal or stabilization of both organic and inorganic pollutants (for reviews see Salt et al., 1998; Macek et al., 2000; Mackova et al., 2006a,b; Marmiroli et al., 2006; Cristaldi et al., 2017; Wang et al., 2017)....
[...]
TL;DR: The information of both molecular and physiological responses of mycorrhizal plants as well as AMF to heavy metal stress which could be helpful for exploring new insight into the mechanisms of HMs remediation by utilizing AMF are provided.
163 citations
TL;DR: This review discusses the deleterious effects of Cd in plants and the tolerant effects in animals and humans.
Abstract: Cadmium accumulation in crops and the possibility of Cd entering the food chain are serious concerns for public health. This review discusses the deleterious effects of Cd in plants and the toleran...
159 citations
Cites background from "A review on in situ phytoremediatio..."
...…fungi and bacteria) play an essential role in enhancing metal tolerance in plants (Mongkhonsin et al., 2019) due to their ability to decrease the availability of Cd and boost plant growth (Amna et al., 2015; Meier et al., 2012; Mishra et al., 2017; Sebastian & Prasad, 2014; Wang et al., 2017)....
[...]
..., 2019) due to their ability to decrease the availability of Cd and boost plant growth (Amna et al., 2015; Meier et al., 2012; Mishra et al., 2017; Sebastian & Prasad, 2014; Wang et al., 2017)....
[...]
...…produce organic acids (e.g., acetic acid, gluconic acid, citric acid, malic acid) (Hussain et al., 2019; Mishra et al., 2017; Shahid et al., 2019; Wang et al., 2017), plant hormones such as GB3, IAA, and CK (Ahmad et al., 2014; Madhaiyan et al., 2007; Ullah et al., 2015), and biosurfactants such…...
[...]
..., acetic acid, gluconic acid, citric acid, malic acid) (Hussain et al., 2019; Mishra et al., 2017; Shahid et al., 2019; Wang et al., 2017), plant hormones such as GB3, IAA, and CK (Ahmad et al....
[...]
...Several reports indicated that soil microorganisms help plants under metal stress through accumulation, transformation, and detoxification of PTEs such as Cd (Liu et al., 2018; Meier et al., 2012; Mishra et al., 2017; Wang et al., 2017)....
[...]
References
More filters
TL;DR: This review article comprehensively discusses the background, concepts and future trends in phytoremediation of heavy metals.
2,718 citations
TL;DR: The ways in which plant growth promoting rhizobacteria facilitate the growth of plants are considered and discussed and the possibility of improving plant growth promotion by specific genetic manipulation is critically examined.
Abstract: The ways in which plant growth promoting rhizobacteria facilitate the growth of plants are considered and discussed. Both indirect and direct mechanisms of plant growth promotion are dealt with. Th...
2,529 citations
TL;DR: Biological mechanisms of toxic metal uptake, translocation and resistance as well as strategies for improving phytoremediation are also discussed.
Abstract: Toxic metal pollution of waters and soils is a major environmental problem, and most conventional remediation approaches do not provide acceptable solutions. The use of specially selected and engineered metal-accumulating plants for environmental clean-up is an emerging technology called phytoremediation. Three subsets of this technology are applicable to toxic metal remediation: (1) Phytoextraction--the use of metal-accumulating plants to remove toxic metals from soil; (2) Rhizofiltration--the use of plant roots to remove toxic metals from polluted waters; and (3) Phytostabilization--the use of plants to eliminate the bioavailability of toxic metals in soils. Biological mechanisms of toxic metal uptake, translocation and resistance as well as strategies for improving phytoremediation are also discussed.
2,183 citations
TL;DR: A review of the full-scale and developing technologies that are available for metal removal can be found in this paper, where the main techniques that have been used for removal of metals from contaminated soils and sediments are discussed.
1,376 citations
TL;DR: The potential for using trees for the phytoremediation of heavy metal-contaminated land is reviewed, including metal tolerance in trees, heavy metal uptake by trees grown on contaminated substrates, heavyMetal compartmentalisation within trees, phytOREmediation using trees and thePhytore mediators of willow (Salix spp.)
1,282 citations