Evaluation of the Extraction Efficiency of Heavy Metals (Pb, Cd, Cu) in Soil–Bayberry System

Zhang, Feiying

doi:10.1080/15320383.2019.1702921

Cited by 7 publications

(2 citation statements)

References 28 publications

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“…Another combined utilization of washing agents was sequential washing with several agents. Zhang et al [106] conducted a sequential washing test to improve the Pb and Cu removal efficiency; an EDTA and CaCl 2 solution was used as a washing agent. The result suggested that sequential washings were effective in dissolving and removing HMs compared with a single washing.…”

Section: Combined Utilization Of Washing Agentsmentioning

confidence: 99%

Remediation of Heavy Metal-Contaminated Soils with Soil Washing: A Review

Zheng

Peng

et al. 2022

Sustainability

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Soil with heavy metals’ contamination has caused worldwide concern, and there is an increasing interest in the application of washing agents for the remediation of soils with heavy metals’ contamination. The review summarizes the recent findings about soil washing with different washing agents. For soil washing technologies, the solubilizing capability, toxicity, and biocompatibility of agents are essential concerns. Washing agents can enhance heavy metals’ desorption and removal from soil. Inorganic acids/bases/salts, synthetic surfactants, and synthetic chelators are often limited due to their adverse effects on soil. Biosurfactants, HAs (humic acids), and LMWOA (low-molecular-weight organic acids) are suggested washing agents, but the limitation of their low production needs to be conquered. Moreover, both washing with a mixture agent and sequential washing have often been adopted to improve the overall capacity of the washing agent for decontamination. Mixture washing can obtain the synergetic effect for soil washing and increase washing efficiency. Sequential washing can apply an agent with a high heavy metals removal rate. However, this may cause environmental risks in the early stage, and then remove the washing agent injected in the early stage by the secondary washing stage. Overall, the already known cases reveal the good prospect of soil washing for soil remediation.

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Section: Combined Utilization Of Washing Agentsmentioning

confidence: 99%

Remediation of Heavy Metal-Contaminated Soils with Soil Washing: A Review

Zheng

Peng

et al. 2022

Sustainability

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“…The degradation of farmland soil quality is a serious threat to food security. Recently, many countries have carried out studies concerning soil quality protection measures and technologies [4]. However, the effect of these efforts is not obvious, and feasible methods are still in the research process [5].…”

Section: Introductionmentioning

confidence: 99%

Speciation Variation and Bio-Activation of Soil Heavy Metals (Cd and Cr) in Rice-Rape Rotation Lands in Karst Regions

Zhang

et al. 2021

IJERPH

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Heavy metals in soil are in a high background state in Karst areas, and agricultural activities will affect the bioactivity of heavy metals. The heavy metal (Cd and Cr) bioactivity and their activation effects in rice-rape rotation lands in Karst areas were studied based on field experiments and laboratory analysis, and the influencing factors of heavy metal activity were analyzed based on the physical and chemical properties of soil. The results suggest that the residual fraction was the largest and the exchangeable fraction was the smallest for both Cr and Cd in rice-rape rotation lands in Karst areas. During the rice-rape rotation process, Cd and Cr tended to be released from the residual fraction and transformed into the other four fractions. The fractions with high bioactivity, including the exchangeable fraction and carbonate fraction, increased to different degrees. Rice-rape rotation could activate the activity of soil Cd and Cr in Karst areas. It is also revealed that the activity of soil Cd and Cr in Karst areas was closely associated with soil pH and electric potential (Eh). In the 0–20 cm soil layer, Cr showed a significant negative correlation with pH (r = −0.69, p < 0.05), while both Cr and Cd showed significant negative correlations with Eh, and the correlation coefficients were −0.85 (p < 0.01) and −0.83 (p < 0.01), respectively. In the 20–40 cm soil layer, Cr showed significant negative correlations with Eh, and the correlation coefficient was −0.95 (p < 0.01). No significant correlation between the activity of soil Cd and Cr and soil mechanical composition was observed. This study revealed that special attention should be paid to changes in pH and Eh in consideration of heavy metal activity in the rice-rape rotation process.

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Geochemical fractionation, source identification and risk assessments for trace metals in agricultural soils adjacent to a city center (Çanakkale, NW Turkey)

Sungur

İşler

2021

Environ Earth Sci

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Evaluation of the Extraction Efficiency of Heavy Metals (Pb, Cd, Cu) in Soil–Bayberry System

Cited by 7 publications

References 28 publications

Remediation of Heavy Metal-Contaminated Soils with Soil Washing: A Review

Remediation of Heavy Metal-Contaminated Soils with Soil Washing: A Review

Speciation Variation and Bio-Activation of Soil Heavy Metals (Cd and Cr) in Rice-Rape Rotation Lands in Karst Regions

Geochemical fractionation, source identification and risk assessments for trace metals in agricultural soils adjacent to a city center (Çanakkale, NW Turkey)

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