Bioleaching of heavy metal-contaminated sediments by indigenous Thiobacillus spp: metal solubilization and sulfur oxidation in the presence of surfactants

2000 ◽  
Vol 54 (6) ◽  
pp. 854-857 ◽  
Author(s):  
H. Seidel ◽  
J. Ondruschka ◽  
P. Morgenstern ◽  
R. Wennrich ◽  
P. Hoffmann
Keyword(s):  
Heavy Metal ◽  
Sulfur Oxidation ◽  
Contaminated Sediments ◽  
Metal Solubilization

Heavy metal speciation in waters, sediments and biota from Lake Macquarie, New South Wales

1987 ◽  
Vol 38 (5) ◽  
pp. 591 ◽  
Author(s):  
GE Batley
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Surface Sediments ◽  
Metal Speciation ◽  
New South ◽  
New South Wales ◽  
Contaminated Sediments ◽  
Zinc Smelter ◽  
South Wales ◽  
Lead Zinc

The distribution and bioavailability of heavy metals in waters and sediments from Lake Macquarie (N.S.W.) have been examined. Elevated concentrations of zinc, lead, cadmium and copper detected in surface sediments and waters from the northern end of the lake are attributable to discharges from a lead-zinc smelter on Cockle Creek. The majority of the metals are in bioavailable forms and are shown to be accumulated in seagrasses, seaweeds and bivalves. Calculations indicate that, at the current rates of discharge, the concentrations of bioavailable metals in newly-deposited sediments should not be deleterious. Elutriate tests showed that there will be no significant mobilization of metals during dredging operations to remove the contaminated sediments.

scholarly journals Strategic selection of an optimal sorbent mixture for in-situ remediation of heavy metal contaminated sediments: Framework and case study

2012 ◽  
Vol 105 ◽  
pp. 1-11 ◽  
Author(s):  
Y.W. Chiang ◽  
R.M. Santos ◽  
K. Ghyselbrecht ◽  
V. Cappuyns ◽  
J.A. Martens ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Contaminated Sediments ◽  
In Situ Remediation ◽  
Selection Of

Carbonaceous halloysite nanotubes for the stabilization of Co, Ni, Cu and Zn in river sediments

2019 ◽  
Vol 6 (8) ◽  
pp. 2420-2428 ◽  
Author(s):  
Yunsong Liu ◽  
Yuanyuan Tang ◽  
Penglei Wang ◽  
Hui Zeng
Keyword(s):  
Heavy Metal ◽  
River Sediments ◽  
Halloysite Nanotubes ◽  
Contaminated Sediments ◽  
Cu And Zn

The remediation of heavy metal contaminated sediments has become a global consideration, especially the development of economically and environmentally efficient amendments.

scholarly journals Study on immobilization of diatomite, Ca(H2PO4)2, CaCO3, HAP and nano-HAP for heavy metal contaminated sediment

2020 ◽  
Vol 55 (4) ◽  
pp. 370-381
Author(s):  
Zhibin Zhang ◽  
Xianhui Shi ◽  
Yanhao Zhang ◽  
Shengrui Wang ◽  
Meng Wang ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Dry Weight ◽  
Contaminated Sediments ◽  
Toxicity Characteristic Leaching Procedure ◽  
Contaminated Sediment ◽  
Blank Group ◽  
Extraction Test ◽  
The Cost ◽  
Leaching Procedure

Abstract The immobilization performances of Diatomite, Ca(H2PO4)2, CaCO3, Hydroxyapatite (HAP) and Nano-HAP (n-HAP) for Zn, Mn, Pb, and Cd contaminated sediments were investigated by immobilization experiments and evaluated by the European Community Bureau of Reference (BCR) extraction test, toxicity characteristic leaching procedure (TCLP). The result of BCR indicated that HAP and Nano-HAP (n-HAP) had a better immobilization effect on metal contaminated sediments, and the residual fractions of Zn, Mn, Pb, and Cd increased from 30.4, 31.9, 55.49 and 54.27% to 36, 39, 72, and 57%, respectively. The order for immobilized effects of additive was: n-HAP > HAP > CaCO3 > Ca(H2PO4)2 > diatomite. However, the cost-effectiveness of HAP was slightly higher than that of n-HAP, so HAP was more suitable for immobilization of heavy metals in sediment. The TCLP test showed that with HAP as immobilization the leaching amount was reduced by approximately 76, 28, 78, and 85% for Zn, Mn, Pb, and Cd, respectively, compared to the blank group. The results also proved that HAP would be an effective and economical agent for immobilizing heavy metals in sediment, with the optimum mass dosage of 10% (the mass ratios of HAP/sediment (dry weight)) of the sediment.

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