Changes in heavy metal mobility and availability from contaminated wetland soil remediated with combined biochar-compost

Liang, Jie; Yang, Zhaoxue; Tang, Lin; Yu, Man; Li, Xiaodong; Wu, Haipeng; Yan, Qiushi; Li, Xuemei; Luo, Yuan

doi:10.1016/j.chemosphere.2017.04.081

Cited by 339 publications

(67 citation statements)

References 66 publications

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“…Therefore, further studies are required to refine the migration and transformation of heavy metals before land use of sewage sludge [15]. Previous studies indicated that the mobility of heavy metals depends on the properties of soil [16,17], total concentrations of heavy metals and their speciation in sewage sludge [18,19], interaction of heavy metals with soil such as adsorption reaction [20], and complexation of heavy metals with organic or inorganic species [21,22].…”

Section: Introductionmentioning

confidence: 99%

Leaching Characteristics of Heavy Metals and Plant Nutrients in the Sewage Sludge Immobilized by Composite Phosphorus-Bearing Materials

Fang

Wang³

et al. 2019

IJERPH

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In order to evaluate the environmental risk caused by land application of sewage sludge, leaching characteristics of heavy metals and plant nutrients in the sewage sludge immobilized by composite phosphorus-bearing materials were investigated. Their cumulative release characteristics were confirmed. Furthermore, the first-order kinetics equation, modified Elovich equation, double-constant equation, and parabolic equation were used to explore dynamic models of release. Results showed that sewage sludge addition significantly increased electricity conductivity (EC) in leachates, and the concentrations of heavy metals (Cu, Cr, Zn) and plant nutrients (N, P, K) were also obviously increased. The highest concentrations of Cu, Cr, and Zn in the leachates were all below the limit values of the fourth level in the Chinese national standard for groundwater quality (GB/T14848-2017). The immobilization of composite phosphorus-bearing materials reduced the release of Cu and Cr, while increased that of Zn. The fitting results of modified Elovich model and double-constant model were in good agreement with the leaching process of heavy metals and plant nutrients, indicating their release process in soil under simulated leaching conditions was not a simple first-order reaction, but a complex heterogeneous diffusion process controlled by multifactor.

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Section: Introductionmentioning

confidence: 99%

Leaching Characteristics of Heavy Metals and Plant Nutrients in the Sewage Sludge Immobilized by Composite Phosphorus-Bearing Materials

Fang

Wang³

et al. 2019

IJERPH

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“…Furthermore, the major factors influencing the speciation distribution of trace metals in soils also include the soil physico‐chemical characteristics (pH, organic matter, redox potential, oxide content, etc.) and environmental factors (temperature, hydrology) . The Pearson correlation indicated that the soil pH has a significant negative relation with the oxidizable fraction of Cu and the acid soluble fractions of Zn and Pb (Table ).…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, this phenomenon may be attributed to some intrinsic properties of metals. Liang et al also suggested that vegetation roots can absorb metals in soils via extracellular or intracellular pathways . The latter generally requires the presence of an ion channel or a metal transport protein in the plasma membrane of the root cell.…”

Section: Discussionmentioning

confidence: 99%

Effects of Planting Patterns on Trace Metals in Soils Following Wetland Restoration

Zhang

Deng

et al. 2018

CLEAN Soil Air Water

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To understand the effects of planting patterns on trace metal fractions in degraded wetland soils in the Jinjiang Estuary, the chemical speciation of trace metals (Cu, Cr, Zn, and Pb) before and after wetland restoration is analyzed based on a measurement and testing program. The results show that wetland restoration, in general, increases the ratios of Cu, Cr, Zn, and Pb in the acid‐soluble fraction and the ratios of Cr, Zn, and Pb in the residual fraction and decreases the ratios of Cr, Zn, and Pb in the reducible fraction and the ratios of Cu, Cr, Zn, and Pb in the oxidizable fraction; thus, the mobility of Cu increases, and the mobility of Cr, Zn, and Pb decreases. Moreover, the planting patterns influence the levels of Cu, Cr, Zn, and Pb to some extent. After wetland restoration, the levels of Cu show an upward trend, and the Pb levels exhibit a downward trend. However, the potential ecological risk of Cu, Cr, Zn, and Pb fail to decrease. The restoration time may have been too short. The results of this study indicate that the planting patterns influence the transformation of trace metal fractions in soil and affect the pollution degree and potential ecological risk, contributing to a better understanding of the effects of planting patterns on trace metals following wetland restoration. The results will be helpful for subsequent scientific research on wetland restoration.

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“…Total contents of heavy metals were detected using national standards [28,29]. Studied metals fractions using a sequential extraction scheme and procedure proposed by Tessier et al was used to partition the toxic metals, which was widely applied in various studies of heavy metal [30][31][32] [33]. Metal concentrations were determined using a PerkinElmer NexION300X inductively coupled plasma mass spectrometer (ICP-MS) and reported on a dry weight basis (mg•kg -1 ).…”

Section: Sample Collection and Analysismentioning

confidence: 99%

Speciation and Ecological Risks of Cobalt and Antimony in Black-Necked Crane (<i>Grus nigricollis</i>) Habitat Sediments in China’s Caohai Lake

Xia¹,

Lin²,

Huang³

et al. 2020

Pol. J. Environ. Stud.

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The potential ecological risks of cobalt (Co) and (Sb) in the sediments of the black-necked crane habitats in Caohai Lake, Guizhou Province were assessed based on total concentration and speciation via Tessier sequential extraction procedure. The results showed that the concentration of Co in the study region is in the range of 4.29-23.79 mg•kg-1 , with an average of 15.41±3.4 mg•kg-1 , which is lower than the soil background concentration in Guizhou Province. The concentration of Sb is in the range of 1.4-1.69 mg•kg-1 , with an average of 1.51±0.3 mg•kg-1 , which is 13.7 times higher than the soil background value of Sb in Guizhou Province. The concentrations of Sb in the west and southeast regions were greater than those in the other parts of the habitats. Co mainly existed in residual and Fe-Mn oxides forms, which account for 68.73-89.14% of total Co. However, Sb mainly existed in residual forms, which account for 79.84-93.11% of the total Sb. The carbonate and organic forms of the two elements and the Fe-Mn oxides of Sb decreased along with decreased water depth. The exchangeable fractions of the two elements were lower than 1% and do not exhibit obvious changes with water depth. The potential ecological risk index of Co (E Co) shows that Co in the five habitats (Liujiaxiang, Zhujiawan, Wangjiayuanzi, Huyelin, and Yangguanshan) was at a moderate risk level. The potential ecological risk index of Sb (E Sb) shows that Sb in the five habitats was at a considerable risk level. All of the RI indexes were at mild and moderate risk levels, which Sb makes a large contributor. According to an assessment of the ratio of the secondary phase to the primary phase, Co and Sb present little pollution and potential ecological risk in the study regions. It can be seen that the evaluation of the ecological impact by the total

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Changes in heavy metal mobility and availability from contaminated wetland soil remediated with combined biochar-compost

Cited by 339 publications

References 66 publications

Leaching Characteristics of Heavy Metals and Plant Nutrients in the Sewage Sludge Immobilized by Composite Phosphorus-Bearing Materials

Leaching Characteristics of Heavy Metals and Plant Nutrients in the Sewage Sludge Immobilized by Composite Phosphorus-Bearing Materials

Effects of Planting Patterns on Trace Metals in Soils Following Wetland Restoration

Speciation and Ecological Risks of Cobalt and Antimony in Black-Necked Crane (<i>Grus nigricollis</i>) Habitat Sediments in China’s Caohai Lake

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