Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil – Results from a greenhouse study

Wang, Jianxu; Feng, Xinbin; Anderson, Christopher; Qiu, Guangle; Li, Ping; Bao, Zhengduo

doi:10.1016/j.jhazmat.2010.10.097

Cited by 97 publications

(55 citation statements)

References 45 publications

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“…The results obtained for L. sativum L. are not as spectacular as those obtained in previous studies by Moreno et al (2004) and Wang et al (2011). These authors reported that the Hg concentration in the whole plants of Brassica juncea L. and Chenopodium glaucum L. exceeded 1800-4500 %, respectively, compared to controls.…”

Section: Discussionsupporting

confidence: 56%

“…This phenomenon may be explained through the decreasing toxicity of Hg which was chelated with thiosulphate. Moreover, according to Wang et al (2011) thiosulphate demonstrated properties of a good ligand for Hg in soil by forming water-soluble complexes, like Hg-S 2 O 3 . Formation of chelates with Hg increased its solubility thus increasing Hg uptake.…”

Section: Discussionmentioning

confidence: 99%

“…This problem can be solved by addition of chemical compounds straight to the soil. These chemicals promote the solubility of metals by the formation of watersoluble complexes and as a result, increase the metal bioavailability (Wang et al 2011).…”

Section: Introductionmentioning

confidence: 99%

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The potential of Lepidium sativum L. for phytoextraction of Hg-contaminated soil assisted by thiosulphate

Smolińska

Rowe

2014

J Soils Sediments

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Purpose The possibility of using higher plants to extract mercury from contaminated sites is dependent on both the concentration of Hg and its bioavailability. To increase the solubility of Hg in soil, some chemical compounds can be used. The aim of this study was to evaluate the effectiveness of Hg soil cleaning with the use of Lepidium sativum L. and sodium thiosulphate, as well as the leach ability of Hg from soil after phytoextraction. Materials and methods The experiment was conducted on soil artificially polluted by Hg, wherein sodium thiosulphate was tested as a phytoextraction promoter. The L. sativum L. plants were used for phytoextraction. The leaching of Hg was assessed by determination of Hg concentration in water extracts. All determinations of Hg in soil, plant and water extracts were analysed by CV-AAS method after acid mineralization. Results and discussion The result of the study showed that L. sativum L. accumulated Hg from contaminated soil mostly in belowground tissues. Even less than 8 % of Hg was translocated to the shoots of L. sativum L. Application of thiosulphate increased the total Hg accumulation over 238-272 %, depending on both the Hg and thiosulphate concentrations in soil. After thiosulphate treatment, translocation of Hg to shoots of L. sativum L. increased even 10 times relative to unassisted process. Thiosulphate did not negatively affect plant biomass; however, the increased leaching of Hg after thiosulphate treatment was observed. Conclusions Lepidium sativum L. showed the potential of a non-hyperaccumulating plant that can be used during phytoextraction of Hg-contaminated soils in controlled conditions. Thiosulphate promoted the phytoextraction process by increasing the total Hg accumulation by whole plant and translocation of Hg to shoots of L. sativum L. Thiosulphatemobilized Hg in soil, which increased the Hg leaching. This constitutes the limitation of applying the technique in the field due to risk of Hg transferring to deeper layers of soil or water. Applying the technique in the field should be preceded by further investigations.

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Section: Discussionsupporting

confidence: 56%

Section: Discussionmentioning

confidence: 99%

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The potential of Lepidium sativum L. for phytoextraction of Hg-contaminated soil assisted by thiosulphate

Smolińska

Rowe

2014

J Soils Sediments

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“…The total mercury recovery rate ranged between 102% and 118%, shown in Supplementary Table S2. Wang et al (2011) reported that the recovery rate of total mercury was in the range of 84% to 116%.…”

Section: Sep Resultsmentioning

confidence: 99%

“…Toxicity characteristic leaching procedure (TCLP) was carried out to evaluate the leachability of mercury for all the samples. Moreover, to gain a better understanding of the stabilization process, the binging forms of Hg in milling samples were analyzed by five-step sequential extraction procedure (SEP) based on the work of Jeyakumar et al (2008) for the determination of specific fractionation of Hg in soil (Wang et al, 2011).…”

mentioning

confidence: 99%

Leaching Behavior and Risk Control of Waste Mercury Chloride Catalyst Through Mechanochemical Reaction Using Sulfur

RenYafeng

ZhuJianxin

2015

Environmental Engineering Science

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A large volume of waste mercury chloride catalyst (HgCl 2 ) is generated by calcium carbide-based polyvinyl chloride production in China, which accounts for 30% of global mercury consumption. However, there are few studies on the leaching behavior and risk control of waste catalyst where mercury is in the form of HgCl 2 , which is more soluble than metal mercury and poses great threat to human health and environment. This study investigated mechanochemical stabilization and leaching behavior of waste mercury catalyst using sulfur as additive. We found that mercuric sulfide (HgS) formed through mechanical milling, although the reaction between HgCl 2 and S is not thermodynamically favored. Moreover, toxicity characteristic leaching procedure (TCLP) results showed mercury leaching values are lower than the TCLP limit value of 0.2 mg/L after mechanochemical treatment. Results of sequential extraction procedure showed that ball mill could transfer more than 99.9% of the Hg in the catalyst to the least mobile fraction.

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Activation of Non‐Enzymatic Antioxidants by Lepidium sativum L. Exposed to Hg During Assisted Phytoextraction

Smolińska

Bonikowski

2018

CLEAN Soil Air Water

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This study focuses on the physiological response of Lepidium sativum L. to Hg and/or nitrilotriacetic acid (NTA) during soil reclamation. Greenhouse experiments are conducted in soil contaminated with Hg to final concentrations of 10 or 100 mg kg−1. The influence of Hg and NTA is studied on the growth of L. sativum L. and the activation of its non‐enzymatic antioxidant system, including generation of ascorbic acid (AA) and tocopherols (TOCs). The results shows that Hg is accumulated by L. sativum L. in its aboveground tissues, but increased lipid peroxidation and H2O2 formation in the plant shoots, which is a symptom of oxidative stress. Plants exposed to Hg produced increasing amounts of AA and TOCs to protect their cells from oxidative damage. Application of NTA to polluted soil did not show any toxic effects on L. sativum L. growth or physiological processes. Amendment of polluted soil with NTA significantly increased Hg accumulation in the aerial tissues of L. sativum L., resulting in decreased soil contamination. The use of NTA can therefore be considered for use in assisted phytoextraction of Hg contaminated soil.

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Ammonium thiosulphate enhanced phytoextraction from mercury contaminated soil – Results from a greenhouse study

Cited by 97 publications

References 45 publications

The potential of Lepidium sativum L. for phytoextraction of Hg-contaminated soil assisted by thiosulphate

The potential of Lepidium sativum L. for phytoextraction of Hg-contaminated soil assisted by thiosulphate

Leaching Behavior and Risk Control of Waste Mercury Chloride Catalyst Through Mechanochemical Reaction Using Sulfur

Activation of Non‐Enzymatic Antioxidants by Lepidium sativum L. Exposed to Hg During Assisted Phytoextraction

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