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Effect of LMWOAs on Maize Remediation of Cadmium and Plumbum Pollution in Farmland

Author

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  • Ronghao Tao

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Jingyi Hu

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Chi Cao

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Jing Zheng

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Xiaotian Zhou

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Hongxiang Hu

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Youhua Ma

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Wenling Ye

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Zhongwen Ma

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

  • Hongjuan Lu

    (Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, College of Resources and Environment, Anhui Agricultural University, Hefei 230036, China)

Abstract

Plant extraction is a thorough remediation method to remove heavy metals from soil. Chelating agents can enhance the extraction effect of heavy metals from soil by plants. In this study, low molecular weight organic acids (LMWOAs), such as citric acid (CA), tartaric acid (TA) and polyaspartate (PASP), were added to the farmland soil contaminated with Cd and Pb and combined with corn to enhance the absorption and extraction of Cadmium (Cd) and Plumbum (Pb). The effects of LMWOAs on the growth and yield of maize, Cd and Pb concentrations in each part of maize, rhizosphere soil pH, total cadmium and lead content and DTPA-Cd and Pb concentrations were studied. The enrichment, transport and extraction ability of maize were analyzed, and calcium chloride (CaCl 2 ) was compared. The results showed that: (1) Exogenous LMWOAs increased the biomass and yield of maize compared with no material added (CK), and CA increased the yield of maize by 6.33%. (2) Exogenous LMWOAs promoted the uptake of Cd and Pb in all parts of maize, and the distribution of Cd and Pb in all organs was as follows: straws > roots > maize cobs > kernels and roots > straws > maize cobs > kernels. The Cd and Pb concentrations in maize kernels were in line with GB 13078-2017 in China, which could be used as feed maize. (3) Exogenous LMWOAs enhanced the enrichment of Cd and Pb in maize straws and roots. PASP had a good enrichment effect on Cd and Pb. CA and CaCl 2 could enhance the transport capacity of Cd and Pb from maize roots to straw. (4) Compared with CK, the total amount of Cd and Pb in rhizosphere soil decreased by 6.93–26.99% and 2.74–6.79%, respectively. LMWOAs could promote the concentration of DTPA-Cd and Pb in rhizosphere soil, and PASP had the most significant increase in DTPA-Cd and Pb in rhizosphere soil. Compared with CK, the soil pH value decreased by 0.03–0.14 units. LMWOAs can enhance the removal of heavy metals from maize, and PASP has the most significant comprehensive effect.

Suggested Citation

  • Ronghao Tao & Jingyi Hu & Chi Cao & Jing Zheng & Xiaotian Zhou & Hongxiang Hu & Youhua Ma & Wenling Ye & Zhongwen Ma & Hongjuan Lu, 2022. "Effect of LMWOAs on Maize Remediation of Cadmium and Plumbum Pollution in Farmland," Sustainability, MDPI, vol. 14(21), pages 1-16, November.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:21:p:14580-:d:964667
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    References listed on IDEAS

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    1. Nguyen Thi Lam & Shaoxian Song & Bui Thi Ngoc Dung & Tran Ngoc Binh & Afshin Maleki & Kazem Godini & Van Tai Tang, 2022. "Potential Role of Combined Microbial Inoculants and Plant of Limnocharis flava on Eliminating Cadmium from Artificial Contaminated Soil," Sustainability, MDPI, vol. 14(19), pages 1-14, September.
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    Cited by:

    1. Shaohong You & Zhenliang Deng & Mouyixing Chen & Yingyi Zheng & Jiu Liu & Pingping Jiang, 2023. "Mn Pretreatment Improves the Physiological Resistance and Root Exudation of Celosia argentea Linn. to Cadmium Stress," IJERPH, MDPI, vol. 20(2), pages 1-11, January.
    2. Sheng Wang & Qi Liu & Zhizong Liu & Jie He & Li Bao & Jilai Zhang & Naiming Zhang, 2023. "Simulation Study on Risk and Influencing Factors of Cadmium Loss in Contaminated Soil," Sustainability, MDPI, vol. 15(2), pages 1-15, January.

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