Chemical methods and phytoremediation of soil contaminated with heavy metals

Chen, H.M; Zheng, Chaogu; Tu, Chen; Shen, Zhenguo

doi:10.1016/s0045-6535(99)00415-4

Cited by 317 publications

(120 citation statements)

References 6 publications

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“…Destaca-se, ainda, que, além da elevada absorção de Pb, o vetiver também apresentou maior tendência de translocação do Pb absorvido pelas raízes para a parte aérea da planta, o que pode ser verificado pelos maiores teores e conteúdos apresentados por esta espécie na matéria seca da parte aérea (Figuras 2 e 3). Esses resultados apontam o vetiver como espécie promissora para programas de fitorremediação de áreas contaminadas com Pb, graças à sua elevada tolerância e grande capacidade de absorção, translocação e acúmulo deste elemento, resultados estes também apontados por outros autores (Chen et al, 2000;Chantachon et al, 2004;Chen et al, 2004).…”

Section: Absorção Distribuição E Acúmulo De Chumbo Pelas Espéciesunclassified

Absorção e distribuição de chumbo em plantas devetiver, jureminha e algaroba

Alves

Souza

Pôrto

et al. 2008

Rev. Bras. Ciênc. Solo

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Section: Absorção Distribuição E Acúmulo De Chumbo Pelas Espéciesunclassified

Absorção e distribuição de chumbo em plantas devetiver, jureminha e algaroba

Alves

Souza

Pôrto

et al. 2008

Rev. Bras. Ciênc. Solo

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“…Many studies were conducted in the last decade using chemical amendments (e.g. dolomite limestone) for chemical remediation of Pb, Cd, and/or Zn in contaminated soil (Chen et al 2000).…”

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confidence: 99%

Dolomite limestone application as a chemical immobilization of metal-contaminated soil

Trakal¹,

Neuberg²,

Tlustoš³

et al. 2011

PLANT SOIL ENVIRON

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In this experiment we proved an effect of dolomite limestone on chemical immobilization in soil contaminated by trace metals, namely Cd, Pb, and Zn. Primary, we set up lysimeter pot experiment to measure soil leaching without vegetation. Willow clone (S. × smithiana Willd) was cultivated in the second lysimeter pot as a new approach to monitor Pb, Cd and Zn leaching, which was affected by soil liming (used in 1% rate). At the time of both harvests, aboveground biomass increased significantly at the amended variant. After the second harvest aboveground biomass production increased by 80% in comparison with the first one, Cd and Zn concentration in biomass decreased 2-fold and 3-fold, respectively. Dolomite limestone as a process of liming: (i) restricted metals leaching from the soil substrate; (ii) reduced metal uptake by willow; and (iii) increased biomass production of willow. Liming also alleviated the plant stress imposed by risk elements resulting in better plant growth and lower levels of stress markers (total nitrogen content and the main amino acid metabolism parameters in the willow leaves) yet through different mechanisms.

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“…Thus, the approach adopted in the present work was to chemically stabilize through an in situ method, using an increase to soil pH (to reduce Cd mobility) but within limits to ensure that paddy soil remained suitable for rice growing. A number of soil amendments, including limestone, zeolite, or other organic and inorganic amendments, have been investigated for Cd stabilization (Chen et al, 2000;Geebelen et al, 2006;Huang et al, 2006;Zhao and Masaihiko, 2007). Most of methods using amendments focus on laboratory-scale incubation or pot trials, while few have been applied in the field, as in the present work.…”

Section: Introductionmentioning

confidence: 98%

Effect of Mineral-Based Amendments on Rice (Oryza sativa L.) Growth and Cadmium Content in Plant and Polluted Soil

Leiming¹,

Pengliang²,

TieBaiqing³

et al. 2017

Environmental Engineering Science

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Agricultural soils can be contaminated by industrial activities such as mining and smelting. Contamination with cadmium (Cd) can significantly exceed average background values, which can lead to uptake by rice plant and even harm to humans through food chain. In Hunan province, southern China, rice (Oryza sativa L.) is the main cereal, and human exposure to metallic contaminants through rice pathway is of particular interest. Shortage of land for rice growing means that contaminated agricultural soil is still cultivated for rice in Hunan. In the present work, a field experiment was undertaken to remediate Cd-contaminated paddy soil with three mineral amendments, namely sepiolite, bone char, and a silicon-based product (normally used as fertilizer). Average Cd concentration in the paddy soil was 2.85 mg/kg, significantly exceeding Chinese soil quality standards of China. Cd content was 0.59 mg/kg in sepiolite, 0.28 mg/kg in bone char, and 0.44 mg/kg in silicon fertilizer, respectively. Distribution fractions of Cd in soil followed the order of exchangeable (FI) > organic matter-bound (FIII) > residual (FIV) > oxide-bound (FII) without treatment, while exchangeable (FI) > residual (FIV) > organic matter-bound (FIII) > oxide-bound (FII) after treatment. With addition of three amendments, soil pH values and rice growth such as plant height and ripening rate increased. Concentrations of Cd in the rice plant (straw, husk, and unpolished rice) decreased after treatment. However, among three amendments, only the bone char addition reduced Cd accumulation in the rice plant below the Chinese standard value (0.2 mg/kg) and in the husk to below the Chinese feed hygiene standard for food (0.5 mg/kg).

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Chemical methods and phytoremediation of soil contaminated with heavy metals

Cited by 317 publications

References 6 publications

Absorção e distribuição de chumbo em plantas devetiver, jureminha e algaroba

Absorção e distribuição de chumbo em plantas devetiver, jureminha e algaroba

Dolomite limestone application as a chemical immobilization of metal-contaminated soil

Effect of Mineral-Based Amendments on Rice (Oryza sativa L.) Growth and Cadmium Content in Plant and Polluted Soil

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