Contribution of waste and biochar amendment to the sorption of metals in a copper mine tailing

Forján, Rubén; Asensio, Verónica; Rodríguez-Vila, Alfonso; Covelo, Emma F.

doi:10.1016/j.catena.2015.09.010

Cited by 66 publications

(22 citation statements)

References 32 publications

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“…Biochar added at 2% or 5% to P increased SPW pH by 2.23 and 3.09 units, respectively, which is consistent with other studies (Forjàn, 2016;Molnàr et al, 2016;Beesley et al, 2014). Jones et al (2016) found that an increase in pH of a French Cu contaminated site (loamy sand) correlated with biochar applications from 1% to 3%.…”

Section: Spw and Technosol Physico-chemical Characteristicssupporting

confidence: 90%

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Lebrun

Macri

Miard

et al. 2017

Journal of Geochemical Exploration

100

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To cite this version:Manhattan Lebrun, Carmelo Macri, Florie Miard, Nour Hattab-Hambli, Mikael Motelica-Heino, et al.. Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix. Journal of Geochemical Exploration, Elsevier, 2017Elsevier, , 182, pp.149-156. <10.1016Elsevier, /j.gexplo.2016 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Mining activities lead to widespread environmental pollution of terrestrial ecosystems due to the presence of metal(loid)s in tailings. These contaminated areas present a health risk and hence need to be rehabilitated. Ex situ methods for soil remediation have been used for a long time but are expensive and disruptive to soil. Phytoremediation techniques for the stabilization or extraction of metal(loid)s could be an efficient alternative as they provide a low-cost and environmentally friendly option. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTHowever, due to the often poor nutrient content of these contaminated soils, amendments must be added to enhance plant growth and to improve phytoremediation efficiency. Biochar, a pyrogenic product, is a promising amendment for assisted phytoremediation. The aims of our study were (i) to evaluate the effect of a pinewood biochar on the physicochemical properties of a former mine contaminated technosol, (ii) to assess the mobility and phytoavailability of As and Pb and (iii) to investigate the remediation potential of three willow species (Salix alba, Salix viminalis and Salix purpurea). A greenhouse experiment was conducted with contaminated technosols amended with biochar and garden soil, single or combined, revegetated with the 3 willow species. The physicochemical properties of soil pore water (SPW) as well as metal(loid) concentrations were determined. Plant growth, Salix organ dry weight and metal(loid) uptake were determined in order to evaluate the phytoremediation potential of the three Salix species studied. Biochar increased the pH and electrical conductivity of SPW. Biochar addition had no effect on As mobility but decreased SPW Pb concentration by 70%. For the three Salix species investigated, biochar addition to the polluted soil induced a better growth and a higher dry weight production. In most modalities tested, the metal(loid)A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTcontent in the Salix organs increased due to the biochar application. Globally, a positive effect of biochar was noticed on the soil qualities (pH and electrical conductivity increase) and plant growth.Metal(loid)s were mostly confined to the roots. Amon...

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Section: Spw and Technosol Physico-chemical Characteristicssupporting

confidence: 90%

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Lebrun

Macri

Miard

et al. 2017

Journal of Geochemical Exploration

100

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“…As previously commented, pH and CEC play keys roles in metal solubility. In this regard, one of the metals most affected by these factors is Cu [41,42]. Significantly negative correlations between the available Cu with respect to the pH, CEC and Mg were found (−0.81, −0.94 and −0.95, respectively; p < 0.01).…”

Section: Discussionmentioning

confidence: 92%

Reuse of Dunite Mining Waste and Subproducts for the Stabilization of Metal(oid)s in Polluted Soils

et al. 2019

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The circular economy seeks to minimize the use of raw materials and waste generation. In this context, here we addressed the use of dunite mining tailings and subproducts to stabilize metal(oid)s in polluted soils. We first characterized the dunite mining tailings and subproducts, and a paradigmatic polluted soil in depth to determine their chemical and mineralogical properties. Experimental trials using Brassica juncea L. were performed to evaluate the impact of the two materials on vegetation growth, edaphic properties and pollutant stabilization yields. To this end, the plants were grown over 75 days in 1 kg pots containing the polluted soil amended with the dunite materials. Notably, both amendments caused a dramatic decrease in the available Zn and a moderate reduction in available Cu, Cd and Pb. In contrast, the concentration of available As was not modified. The cation exchange capacity (CEC) was improved by treatment with the amendments, allowing an increase in the biomass harvested. The immobilization mechanism achieved was probably due to an increase in pH and CEC. In conclusion, the dunite tailings and subproducts could be effective amendments for stabilizing polluted soil. This work paves the way for additional studies with distinct types of soils and conditions.

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“…Chelating agents have great efficiency in enhancing metal uptake by plants. Inorganic amendments could increase the pH of soils and reduce metal bioavailability (Monica et al 2008;Lambrechts et al 2011;Forján et al 2016). However, chelating agents and inorganic amendments possibly cause potential heavy metal toxicity in plants and soil quality degradation, as well as enhance leaching of heavy metals to groundwater and off-site migration (Liu et al 2008;Lambrechts et al 2011;Lee et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…For the immobilization, metals are less available for plant uptake and human ingestion through food chain, due to adsorption on solid surfaces, complexation with humic substances and precipitation reactions (Nawab et al 2015). Many studies have stated that organic amendments lead to a decrease in the assimilable metal content, such as Cd, Pb, Zn, As, and Cr in soils (Bolan et al 2014;Forján et al 2016). Several types of organic amendments have effectively reduced metal bioavailability in amended soils and their uptake by plants.…”

Section: Introductionmentioning

confidence: 99%

The influence of humic substance on Cd accumulation of phytostabilizer Athyrium wardii (Hook.) grown in Cd-contaminated soils

Zhan

et al. 2016

Environ Sci Pollut Res

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The application of organic amendments into heavy metal contaminated soil is considered as an environmentally friendly technique to promote the potential of phytoremediation. A pot experiment was carried out to evaluate the effect of humic substances on growth, cadmium (Cd) accumulation and phytostabilization potential of the mining ecotype (ME) and the corresponding non-mining ecotype (NME) of Athyrium wardii (Hook.) grown in Cd-contaminated soils. The addition of the humic substances demonstrated great promotion for the growth and Cd uptake of ME. Both plant biomass and Cd concentration significantly increased with the increasing application of the humic substances up to 100 g kg(-1), beyond which no significant change of underground part biomass and Cd concentrations in underground part of A. wardii was observed. The maximum Cd concentration in underground part of ME was 180 mg kg(-1) when 150 g kg(-1) humic substances were applied. The ME showed greater Cd accumulation capability in underground part (0.47-0.68 mg plant(-1)) than that of NME (0.27-0.45 mg plant(-1)). Increasing bioaccumulation coefficient (BCF) values of A. wardii was observed with increasing application of the humic substances. The BCF values of ME were higher than those of NME. However, the use of the humic substances exhibited little impact on translocation factors (TFs) of ME, and the TF values of ME were less than NME. Furthermore, the application of the humic substances improved the remediation factors (RFs) of A. wardii. The RF values in underground part of ME ranging from 0.73 to 0.91 % were apparently higher than those of NME. These results indicated that the humic substances can be a potential candidate for enhancing the phytostabilization of A. wardii grown in Cd-contaminated soils.

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Contribution of waste and biochar amendment to the sorption of metals in a copper mine tailing

Cited by 66 publications

References 32 publications

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Effect of biochar amendments on As and Pb mobility and phytoavailability in contaminated mine technosols phytoremediated by Salix

Reuse of Dunite Mining Waste and Subproducts for the Stabilization of Metal(oid)s in Polluted Soils

The influence of humic substance on Cd accumulation of phytostabilizer Athyrium wardii (Hook.) grown in Cd-contaminated soils

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