scholarly journals Influence of Gliricidia sepium Biochar on Attenuate Perchlorate-Induced Heavy Metal Release in Serpentine Soil

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Prasanna Kumarathilaka ◽  
Meththika Vithanage
Keyword(s):  
Heavy Metal ◽  
Hydrogen Bonding ◽  
Extraction Method ◽  
Gliricidia Sepium ◽  
Serpentine Soil ◽  
Metal Release ◽  
Soil Incubation ◽  
Bioavailable Fraction ◽  
Incubation Study ◽  
Heavy Metal Release

Perchlorate (ClO4-) is a strong oxidizer, capable of accelerating heavy metal release into regolith/soil. Here, we assessed interactions between ClO4- and serpentine soil to simulate and understand the fate of Ni and Mn and their immobilization with the presence of biochar (BC). A soil incubation study (6 months) was performed using serpentine soil in combination with different ClO4- concentrations (0.25, 0.5, 0.75, and 1 wt.%) and three different amendment rates (1, 2.5, and 5 wt.%) of Gliricidia sepium BC. Bioavailable fraction of Ni and Mn was analyzed using CaCl2 extraction method. An increase of ClO4- concentrations enhanced bioavailability fraction of Ni and Mn. However, BC amendments reduced the bioavailability of Ni and Mn. In comparison, 5% BC amendment significantly immobilized the bioavailability of Ni (68–92%) and Mn (76–93%) compared to other BC amendment rates. Electrostatic attractions and surface diffusion could be postulated for Ni and Mn immobilization by BC. In addition, ClO4- may have adsorbed to BC via hydrogen bonding which may reduce the influence of ClO4- on Ni and Mn mobility. Overall, it is obvious that BC could be utilized as an effective amendment to immobilize Ni and Mn in heavy metal and ClO4- contaminated soil.

scholarly journals Modeling heavy metal release in the epiphytic lichen Evernia prunastri

2021 ◽  
Author(s):  
Andrea Vannini ◽  
Luca Paoli ◽  
Riccardo Fedeli ◽  
Sharon Kwambai Kangogo ◽  
Massimo Guarnieri ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Remote Area ◽  
Metal Release ◽  
Evernia Prunastri ◽  
Epiphytic Lichen ◽  
Pollution Levels ◽  
Short Period ◽  
High Pollution ◽  
Heavy Metal Release ◽  
Very High

AbstractIn this study, the release of Cu2+ and Zn2+ was investigated and modeled in the epiphytic lichen Evernia prunastri. Samples were incubated with solutions containing these metals at ecologically relevant concentrations (10 and 100 μM) and then transplanted to a remote area and retrieved after 1, 2, 3, 6, 12, and 18 months. The results showed that, after 12 months, all samples faced similar metal reductions of ca. 80–85%, but after this period, all the involved processes seem to be no longer capable of generating further reductions. These results suggest that the lichen E. prunastri can provide information about environmental improvements after exposure to high or very high pollution levels in a relatively short period of time.

Heavy Metal Release from Soils in Batch pHstat Experiments

1999 ◽  
Vol 63 (2) ◽  
pp. 290-296 ◽  
Author(s):  
Andreas Schwarz ◽  
Wolfgang Wilcke ◽  
Wolfgang Zech ◽  
Jan Stýk
Keyword(s):  
Heavy Metal ◽  
Metal Release ◽  
Heavy Metal Release

Analysis of Influence Factors on Heavy Metal Release from Mine Waste Rock in Fu Xin Mine Area

2010 ◽  
Vol 29-32 ◽  
pp. 2570-2575
Author(s):  
Bing Liang ◽  
Li Guo Jiang ◽  
Xiu Sheng Lu
Keyword(s):  
Heavy Metal ◽  
Ph Value ◽  
Mine Waste ◽  
Influence Factors ◽  
Waste Rock ◽  
Metal Release ◽  
Mine Waste Rock ◽  
Leaching Solution ◽  
Heavy Metal Elements ◽  
Heavy Metal Release

For analysis of influence factors on heavy metal release from different weathering mine waste rock in Fu Xin mine area under the effect of rain water leaching, the materials which come from mine waste rock pile nearby Xin Qiu mine is collected and then process a serial leaching experiments. The initial PH value of leaching solution and experiment temperature have been selected to as influencing factors according to rainfall and weather condition of Fuxin mining area. The concentration of five heavy metal elements: Cd, Cr, Cu, Mn and Pb are tested in leaching solutions. The results show that the constituent characteristics of stratum rock is a major factor influenced on leaching solutions and heavy metal release. The weakly acidic leaching solution becomes to weakly alkaline after leaching the waste rock. The quantities of different heavy metal release represent disparate rules, influenced by distinct weathering degree. Concentrations of Cd and Cr increase with the leaching solution's pH value variation while Cu, Mn and Pb decreased. Higher temperature leads more heavy metal elements release from the waste rock.

Heavy metal release by peat erosion in the Peak District, southern Pennines, UK

2005 ◽  
Vol 19 (15) ◽  
pp. 2973-2989 ◽  
Author(s):  
J. J. Rothwell ◽  
S. G. Robinson ◽  
M. G. Evans ◽  
J. Yang ◽  
T. E. H. Allott
Keyword(s):  
Heavy Metal ◽  
Metal Release ◽  
Heavy Metal Release ◽  
Peak District

Enhancement of active thin-layer capping with natural zeolite to simultaneously inhibit nutrient and heavy metal release from sediments

2018 ◽  
Vol 119 ◽  
pp. 64-72 ◽  
Author(s):  
Chunhui Xiong ◽  
Dongyu Wang ◽  
Nora Fungyee Tam ◽  
Yunyu Dai ◽  
Xiaomeng Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Thin Layer ◽  
Natural Zeolite ◽  
Metal Release ◽  
Heavy Metal Release
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