scholarly journals Effect of biodegradable chelators on induced phytoextraction of uranium- and cadmium- contaminated soil by Zebrina pendula Schnizl

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Li Chen ◽  
Dan Wang ◽  
Chan Long ◽  
Zheng-xu Cui
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Rank Order ◽  
Single Plant ◽  
High Concentration ◽  
Control Groups ◽  
Cd Uptake ◽  
Translocation Factors ◽  
Induced Phytoextraction ◽  
Cadmium Contaminated Soil

AbstractThis study investigated the effect of ethylenediamine-N,N′-disuccinic acid (EDDS), oxalic acid (OA), and citric acid (CA) on phytoextraction of U- and Cd-contaminated soil by Z. pendula. In this study, the biomass of tested plant inhibited significantly following treatment with the high concentration (7.5 mmol·kg−1) EDDS treatment. Maximum U and Cd concentration in the single plant was observed with the 5 mmol·kg−1 CA and 7.5 mmol·kg−1 EDDS treatment, respectively, whereas OA treatments had the lowest U and Cd uptake. The translocation factors of U and Cd reached the maximum in the 5 mmol·kg−1 EDDS. The maximum bioaccumulation of U and Cd in the single plants was 1032.14 µg and 816.87 µg following treatment with 5 mmol·kg−1 CA treatment, which was 6.60- and 1.72-fold of the control groups, respectively. Furthermore, the resultant rank order for available U and Cd content in the soil was CA > EDDS > OA (U) and EDDS > CA > OA (Cd). These results suggested that CA could greater improve the capacity of phytoextraction using Z. pendula in U- and Cd- contaminated soils.

Clay Minerals as a Feasible Additive to Stabilize Cadmium in Contaminated Soils

2007 ◽  
Vol 336-338 ◽  
pp. 1906-1909 ◽  
Author(s):  
Zhen Qi Hu ◽  
Xiu Hong Yang ◽  
Ying Chun Zhang
Keyword(s):  
Clay Minerals ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Langmuir Model ◽  
Adsorption Behavior ◽  
Metal Concentrations ◽  
Pot Experiments ◽  
Maximum Sorption ◽  
Cadmium Contaminated Soil

The adsorption behavior of clay minerals in cadmium contaminated soils has been studied in order to remedy soils contaminated with this metal in this work. The results show that Langmuir model best describes the adsorption of Cd2+, and the maximum sorption values of 8.45 mg/g for bentonite, 5.69mg/g for sepiolite and 10.57mg/g for attapulgite are obtained at pH 5-6. In addition, the effect of clay minerals amendment on a highly cadmium contaminated soil has been studied by means of pot experiments. The results indicate that the metal concentrations in shoot and root of plant decreased with addition of clay minerals to soil (1%), and the highest decrease value of metal concentrations is obtained in the soils added by attapulgite amendment.

scholarly journals Cadmium Uptake and Growth Responses of Potted Vegetables to the Cd-Contaminated Soil Inoculated with Cd-Tolerant Purpureocillium lilacinum N1

Minerals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 622
Author(s):  
Yan Deng ◽  
Haonan Huang ◽  
Shaodong Fu ◽  
Luhua Jiang ◽  
Yili Liang ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Cost Effective ◽  
Fungal Strain ◽  
Growth Responses ◽  
Cd Uptake ◽  
Purpureocillium Lilacinum ◽  
Pot Experiments ◽  
Cost Effective Technique ◽  
Promote Plant Growth

Bioremediation of Cd- (cadmium) contaminated soil using Cd-tolerant fungus is considered an eco-friendly and cost-effective technique. In this study, we isolated one fungal strain that was hyper-tolerant to Cd from a highly polluted river and conducted pot experiments to evaluate its effects on bioremediation. We found that the fungal strain belonging to the genus, Purpureocillium lilacinum, tolerated 12,000 mg/L Cd. SEM manifested that Cd can be bioaccumulated on the crumpled mycelial surface, generating plenty of metal precipitation particles. In addition, pot experiments showed that the inoculation of P. lilacinum N1 could reduce the total Cd content in soil (2.09% in low contaminated soil and 12.56% in high contaminated soil) and greatly promote plant growth (2.16~3.13 times). Although the Cd concentration of plants was increased by 112.8% in low contaminated soil and decreased by 9.5% in highly contaminated soil with the inoculation of P. lilacinum N1, the total uptake of Cd by plants was greatly improved—1.84~3.6 times higher than that in CK groups. All our results suggest that P. lilacinum N1 is a valuable candidate for the bioremediation of Cd-contaminated soils because of its dual effects on the total Cd content in soil and Cd uptake in plants.

Effects of Three Salts to Oilseed Rape (Brassica napus) Accumulating Cadmium in Cd-Contaminated Soil

2011 ◽  
Vol 356-360 ◽  
pp. 63-69
Author(s):  
Liang Peng Yi ◽  
Zu Wei Wang
Keyword(s):  
Sodium Chloride ◽  
Brassica Napus ◽  
Sodium Carbonate ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Sodium Sulfate ◽  
Cadmium Accumulation ◽  
Saline Soils ◽  
High Concentration ◽  
Different Types

In order to use the Cd-contaminated saline soil, experiments have been carried out to analyze the differences among effects of three salts on cadmium accumulation capacities of Brassica Napus in Cd-contaminated soil, thus to figure out the phytoremediation effects of planting Brassica Napus in different types of Cd-contaminated saline soils. Brassica Napus(a cadmium hyperaccumulator plant) has been as the research plant, the Brassica Napus was planted in Cd-contaminated soils (Cd: 10 mg•kg-1) with different salt concentrations(0 g•kg-1, 2g•kg-1,4 g•kg-1 and 6 g•kg-1) for 60 days as required by the greenhouse pot soil culture experiment, thus to study the bioconcentration factor(BCF) of Brassica Napus on Cd and the effects of Brassica Napus on the changes of concentrations in the shoots and roots. The three main salts in the soil, namely, sodium chloride, sodium sulfate and sodium carbonate, were chosen as the analysis and research objects. The results showed that the soil containing sodium carbonate inhibited the Brassica Napus from absorbing Cd in the soil, so did the soil containing sodium sulfate, however, the effect was not so obvious as that of the soil containing sodium carbonate. However, the soil containing sodium chloride had little impact on Cd absorption of the Brassica Napus that it could only slightly promote the cadmium accumulation capacities of Brassica Napus under a very high concentration, In different types of saline soils, there were significant differences among the effects of different salts on cadmium accumulation capacities of Brassica Napus, the sodium chloride in the soil had little impact on cadmium accumulation capacities of the roots of Brassica Napus, however, it could enhance the cadmium accumulation capacities of the shoots of Brassica Napus; the sodium carbonate in the soil could significantly inhibit the shoots and roots of Brassica Napus from accumulating the cadmium, therefore, it was not conducive for the Brassica Napus to accumulate cadmium.

scholarly journals Uptake and Distribution of Cd in Sweet Maize Grown on Contaminated Soils: A Field-Scale Study

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Wending Xu ◽  
Guining Lu ◽  
Zhi Dang ◽  
Changjun Liao ◽  
Qiangpei Chen ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Nitrilotriacetic Acid ◽  
Leaf Sheath ◽  
Relative Distribution ◽  
Leaf Lamina ◽  
Field Scale ◽  
High Concentration ◽  
Maize Cultivars ◽  
Field Soils

Maize is an economic crop that is also a candidate for use in phytoremediation in low-to-moderately Cd-contaminated soils, because the plant can accumulate high concentration of Cd in parts that are nonedible to humans while accumulating only a low concentration of Cd in the fruit. Maize cultivars CT38 and HZ were planted in field soils contaminated with Cd and nitrilotriacetic acid (NTA) was used to enhance the phytoextractive effect of the maize. Different organs of the plant were analyzed to identify the Cd sinks in the maize. A distinction was made between leaf sheath tissue and leaf lamina tissue. Cd concentrations decreased in the tissues in the following order: sheath > root > lamina > stem > fruit. The addition of NTA increased the amount of Cd absorbed but left the relative distribution of the metal among the plant organs essentially unchanged. The Cd in the fruit of maize was below the Chinese government’s permitted concentration in coarse cereals. Therefore, this study shows that it is possible to conduct maize phytoremediation of Cd-contaminated soil while, at the same time, harvesting a crop, for subsequent consumption.

scholarly journals Effects of Nanoparticle Hydroxyapatite on Growth and Antioxidant System in Pakchoi (Brassica chinensis L.) from Cadmium-Contaminated Soil

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Zhangwei Li ◽  
Jiaai Huang
Keyword(s):  
Antioxidant Enzymes ◽  
Vitamin C ◽  
Contaminated Soil ◽  
Plant Uptake ◽  
Cd Stress ◽  
Cd Uptake ◽  
Brassica Chinensis ◽  
Plant Shoots ◽  
Control Samples ◽  
Cadmium Contaminated Soil

The effects of nanoscale particle hydroxyapatite (nHAP) on biomass, Cd uptake, the level of chlorophyll, vitamin C, malondialdehyde (MDA), and the activities of antioxidant enzymes, including SOD, CAT, and POD in pakchoi in Cd-contaminated soil, were evaluated by conducting pot experiment. Results showed that, by application of the 5 g·kg−1, 10 g·kg−1, 20 g·kg−1, and 30 g·kg−1nHAP in 10 mg·kg−1Cd-contaminated soil, the biomass of plant increased by 7.97%, 13.21%, 19.53%, and 20.23%, respectively. In addition, the reduction of Cd in shoots was 27.12%, 44.20%, 50.91%, and 62.36% compared to control samples. It was found that the supplement of the nHAP can increase the level of chlorophyll and vitamin C and decrease the level of MDA in plant shoots. Furthermore, the increment activities of SOD, CAT, and POD can be observed after addition of nHAP in Cd-contaminated soil. The results confirmed that nHAP can be applied to reduce the plant uptake of Cd and resist the Cd stress in the plant in Cd-contaminated soil.

scholarly journals Fractionation of Heavy Metals in Multi-Contaminated Soil Treated with Biochar Using the Sequential Extraction Procedure

Biomolecules ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 448
Author(s):  
Mahrous Awad ◽  
Zhongzhen Liu ◽  
Milan Skalicky ◽  
Eldessoky S. Dessoky ◽  
Marian Brestic ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Ph ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Extraction Procedure ◽  
Sequential Fractionation ◽  
Relationship Of ◽  
The Relationship

Heavy metals (HMs) toxicity represents a global problem depending on the soil environment’s geochemical forms. Biochar addition safely reduces HMs mobile forms, thus, reducing their toxicity to plants. While several studies have shown that biochar could significantly stabilize HMs in contaminated soils, the study of the relationship of soil properties to potential mechanisms still needs further clarification; hence the importance of assessing a naturally contaminated soil amended, in this case with Paulownia biochar (PB) and Bamboo biochar (BB) to fractionate Pb, Cd, Zn, and Cu using short sequential fractionation plans. The relationship of soil pH and organic matter and its effect on the redistribution of these metals were estimated. The results indicated that the acid-soluble metals decreased while the fraction bound to organic matter increased compared to untreated pots. The increase in the organic matter metal-bound was mostly at the expense of the decrease in the acid extractable and Fe/Mn bound ones. The highest application of PB increased the organically bound fraction of Pb, Cd, Zn, and Cu (62, 61, 34, and 61%, respectively), while the BB increased them (61, 49, 42, and 22%, respectively) over the control. Meanwhile, Fe/Mn oxides bound represents the large portion associated with zinc and copper. Concerning soil organic matter (SOM) and soil pH, as potential tools to reduce the risk of the target metals, a significant positive correlation was observed with acid-soluble extractable metal, while a negative correlation was obtained with organic matter-bound metal. The principal component analysis (PCA) shows that the total variance represents 89.7% for the TCPL-extractable and HMs forms and their relation to pH and SOM, which confirms the positive effect of the pH and SOM under PB and BB treatments on reducing the risk of the studied metals. The mobility and bioavailability of these metals and their geochemical forms widely varied according to pH, soil organic matter, biochar types, and application rates. As an environmentally friendly and economical material, biochar emphasizes its importance as a tool that makes the soil more suitable for safe cultivation in the short term and its long-term sustainability. This study proves that it reduces the mobility of HMs, their environmental risks and contributes to food safety. It also confirms that performing more controlled experiments, such as a pot, is a disciplined and effective way to assess the suitability of different types of biochar as soil modifications to restore HMs contaminated soil via controlling the mobilization of these minerals.

scholarly journals Dynamic of Morphological and Physiological Parameters and Variation of Soil Characteristics during Miscanthus × giganteus Cultivation in the Diesel-Contaminated Land

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 798
Author(s):  
Valentina Pidlisnyuk ◽  
Andriy Herts ◽  
Volodymyr Khomenchuk ◽  
Aigerim Mamirova ◽  
Oleksandr Kononchuk ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Contaminated Soils ◽  
Soil Characteristics ◽  
Physiological Parameters ◽  
Wastewater Sludge ◽  
Contaminated Land ◽  
Miscanthus Giganteus ◽  
Uncontaminated Soil ◽  
Stems And Leaves ◽  
Biochar Amendment

Miscanthus × giganteus (M. × giganteus) is a perspective plant produced on marginal and contaminated lands with biomass used for energy or bioproducts. In the current study, M. × giganteus development was tested in the diesel-contaminated soils (ranged from 250 mg kg−1 to 5000 mg kg−1) and the growth dynamic, leaves quantity, plants total area, number of harvested stems and leaves, SPAD and NPQt parameters were evaluated. Results showed a remarkable M. × giganteus growth in a selected interval of diesel-contaminated soil with sufficient harvested biomass. The amendment of soil by biochar 1 (produced from wastewater sludge) and biochar 2 (produced from a mixture of wood waste and biohumus) improved the crop’s morphological and physiological parameters. Biochar 1 stimulated the increase of the stems’ biomass, while biochar 2 increased the leaves biomass. The plants growing in the uncontaminated soil decreased the content of NO3, pH (KCl), P2O5 and increased the content of NH4. Photosynthesis parameters showed that incorporating biochar 1 and biochar 2 to the diesel-contaminated soil prolonged the plants’ vegetation, which was more potent for biochar 1. M. × giganteus utilization united with biochar amendment can be recommended to remediate diesel-contaminated land in concentration range 250–5000 mg kg−1.

Influence of cadmium-contaminated soil on earthworm communities in a subtropical area of China

2018 ◽  
Vol 127 ◽  
pp. 64-73 ◽  
Author(s):  
Kun Wang ◽  
Yuhui Qiao ◽  
Huiqi Zhang ◽  
Shizhong Yue ◽  
Huafen Li ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Subtropical Area ◽  
Cadmium Contaminated Soil
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