Immobilization of copper in contaminated sandy soils using calcium water treatment residue.

Chemical remediation has attracted increasing attention for heavy metal contaminated soils because of its relatively low cost and high efficiency. In this study laboratory incubation and column leaching experiments were conducted to understand the mechanisms of copper (Cu) immobilization by calcium water treatment residue (Ca-WTR) and to estimate the optimal rate for remediating Cu-contaminated soils. The results showed that Ca-WTR amendment significantly raised soil pH and decreased water soluble and exchangeable Cu by 62-90% in the contaminated soils. Most of the bioavailable Cu was converted into more stable Cu fractions, i.e. oxides-bound and residual Cu. The cumulative amount of Cu in the leachate after 10 leaching events was reduced by 80% and 73%, respectively for the two tested soils at the Ca-WTR rate of 20 g kg(-1) for Alfisol and 100 g kg(-1) for Spodosol. These results indicate that Ca-WTR is effective in raising soil pH and converting labile Cu to more stable forms in the contaminated soils. A pH value of 6.5 was found to be critical for lowering Cu availability in the soils. Based on this criterion and pH response curve to Ca-WTR application, the optimal rates of Ca-WTR can be estimated for different Cu-contaminated soils.

[1]  Anders Lagerkvist,et al.  Stabilization of Pb- and Cu-contaminated soil using coal fly ash and peat. , 2007, Environmental pollution.

[2]  G. Osmond.  Long-Term Aging of Copper Added to Soils , 2022 .

[3]  E Besnard,et al.  Influence of organic amendments on copper distribution among particle-size and density fractions in Champagne vineyard soils. , 2001, Environmental pollution.

[4]  H. Allen,et al.  Copper activity in soil solutions of calcareous soils. , 2007, Environmental pollution.

[5]  A. Mehlich.  Mehlich 3 soil test extractant: A modification of Mehlich 2 extractant , 1984 .

[6]  A. Alva,et al.  Adsorption/Desorption of Copper by a Sandy Soil Amended with Various Rates of Manure, Sewage Sludge, and Incinerated Sewage Sludge , 2005, Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes.

[7]  Kenneth S. Sajwan,et al.  Evaluation of Poultry Litter Amendment to Agricultural Soils: Leaching Losses and Partitioning of Trace Elements in Collard Greens , 2009 .

[8]  G. Merrington,et al.  Review of impacts on soil biota caused by copper residues from fungicide application , 2004 .

[9]  G. C. Schutte,et al.  Rind Stippling on Valencia Oranges by Copper Fungicides Used for Control of Citrus Black Spot in South Africa. , 1997, Plant disease.

[10]  L. Ma,et al.  Mechanisms of lead, copper, and zinc retention by phosphate rock. , 2004, Environmental pollution.

[11]  Ruiqiang Liu,et al.  In situ immobilization of Cu(II) in soils using a new class of iron phosphate nanoparticles. , 2007, Chemosphere.

[12]  L. Titshall,et al.  The disposal of a lime water treatment residue on soil and spoil material from a coalmine: a glasshouse investigation. , 2007, Journal of environmental quality.

[13]  A. Alva.  Copper contamination of sandy soils and effects on young Hamlin orange trees , 1993, Bulletin of environmental contamination and toxicology.

[14]  H. A. Elliott,et al.  Agronomic Effects of Land Application of Water Treatment Sludges , 1991 .

[15]  S. Komarneni,et al.  Highly charged swelling mica reduces free and extractable Cu levels in Cu-contaminated soils. , 2008, Environmental science & technology.

[16]  Zhenli He,et al.  Transport of heavy metals in surface runoff from vegetable and citrus fields , 2004 .

[17]  N. Basta,et al.  Evaluating soil tests to predict bermudagrass growth in drinking water treatment residuals with phosphorus fertilizer , 2000 .

[18]  W. P. Miller,et al.  Soil solution chemistry of a fly ash-, poultry litter-, and sewage sludge-amended soil. , 2000 .

[19]  W. Lindsay.  Chemical equilibria in soils , 1979 .

[20]  J. Száková,et al.  Retention of copper originating from different fungicides in contrasting soil types. , 2009, Journal of hazardous materials.

[21]  M. Arias-Estévez,et al.  Copper fractionation and release from soils devoted to different crops. , 2009, Journal of hazardous materials.

[22]  B. J. Alloway,et al.  Heavy metals in soils , 1990 .

[23]  W. P. Miller,et al.  A micro‐pipette method for soil mechanical analysis , 1987 .

[24]  M. Jalali,et al.  EFFECT OF AGING PROCESS ON THE FRACTIONATION OF HEAVY METALS IN SOME CALCAREOUS SOILS OF IRAN , 2008 .

[25]  J. Oades,et al.  Improvement of soil structure and plant growth by addition of alum sludge , 1980 .

[26]  D. Sparks,et al.  Methods of soil analysis. Part 3 - chemical methods. , 1996 .

[27]  A. Garcia-sanchez,et al.  Palygorskite as a feasible amendment to stabilize heavy metal polluted soils. , 2003, Environmental pollution.

[28]  M. McBride,et al.  Copper Phytotoxicity in a Contaminated Soil: Remediation Tests with Adsorptive Materials , 2000 .

[29]  W. P. Miller,et al.  Cation Exchange Capacity and Exchange Coefficients , 2018, SSSA Book Series.

[30]  Raimondo Ciccu,et al.  Heavy metal immobilization in the mining-contaminated soils using various industrial wastes , 2003 .

[31]  L. D. Tyler,et al.  MOBILITY AND EXTRACTABILITY OF CADMIUM, COPPER, NICKEL, AND ZINC IN ORGANIC AND MINERAL SOIL COLUMNS , 1982 .

[32]  J. Mallet,et al.  Aging effect on the copper sorption on a vineyard soil: column studies and SEM-EDS analysis. , 2009, Journal of colloid and interface science.

[33]  C. Huang,et al.  Adsorption-desorption behavior of copper at contaminated levels in red soils from China. , 2002, Journal of environmental quality.

[34]  Xiaoe Yang,et al.  Trace elements in agroecosystems and impacts on the environment. , 2005, Journal of trace elements in medicine and biology : organ of the Society for Minerals and Trace Elements.

[35]  Ming Chen,et al.  Baseline Concentrations of 15 Trace Elements in Florida Surface Soils , 1999 .

[36]  D. Strawn,et al.  Molecular characterization of copper in soils using X-ray absorption spectroscopy. , 2009, Environmental pollution.

[37]  L. Ma,et al.  CHEMICAL FRACTIONATION OF CADMIUM, COPPER, NICKEL, AND ZINC IN CONTAMINATED SOILS , 1997 .

[38]  Zhenli He,et al.  Vertical distribution and water solubility of phosphorus and heavy metals in sediments of the St. Lucie Estuary, South Florida, USA , 2006 .

[39]  H. Fritze,et al.  Organic material as a copper immobilising agent: a microcosm study on remediation , 2002 .

[40]  G. O'Connor,et al.  Phosphorus release from a manure-impacted spodosol: effects of a water treatment residual. , 2006, Journal of environmental quality.

[41]  L. Stievano,et al.  Sorption of Cu(II) onto vineyard soils: macroscopic and spectroscopic investigations. , 2007, Journal of colloid and interface science.

[42]  W. Beyer.  Evaluating soil contamination , 1990 .