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Influences of Cadmium and Zinc Interaction and Humic Acid on Metal Accumulation in Ceratophyllum Demersum 总被引：1，自引：0，他引：1
Sushera Bunluesin Prayad Pokethitiyook Guy R. Lanza Julian F. Tyson Maleeya Kruatrachue Baoshan Xing Suchart Upatham 《Water, air, and soil pollution》2007,180(1-4):225-235
Interactions between Zn and Cd on the accumulation of these metals in coontail, Ceratophyllum demersum were studied at different metal concentrations. Plants were grown in nutrient solution containing Cd (0.05–0.25 mg l?1) and Zn (0.5–5 mgl?1). High concentrations of Zn caused a significant decrease in Cd accumulation. In general, adding Cd solution decreased Zn accumulation in C. demersum except at the lowest concentration of Zn in which the Zn accumulation was similar to that without Cd. C. demersum could accumulate high concentrations of both Cd and Zn. The influence of humic acid (HA) on Cd and Zn accumulation was also studied. HA had a significant effect on Zn accumulation in plants. 2 mg l?1 of HA reduced Zn accumulation at 1 mg l?1 level (from 2,167 to 803 mg kg?1). Cd uptake by plant tissue, toxicity symptoms and accumulation at 0.25 and 0.5 mg l?1, were reduced (from 515 to 154 mg kg?1 and from 816 to 305 mg kg?1, respectively) by addition of 2 mg l?1 of HA. Cd uptake reached a maximum on day 9 of treatment, while that of Zn was observed on day 15. Long-term accumulation study revealed that HA reduced toxicity and accumulation of heavy metals. 相似文献
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Piyaporn Waranusantigul Maleeya Kruatrachue Prayad Pokethitiyook Choowong Auesukaree 《Water, air, and soil pollution》2008,193(1-4):79-90
The phytoremediation potential for Pb of Buddleja asiatica (a wild species) and a closely related cultivated species, B. paniculata, was investigated by means of field survey, hydroponic and pot experiments, and field trial experiments. Field surveys showed that B. asiatica had an extraordinary accumulation capacity and tolerance for Pb. Plants grown in soil with 2,369.8–206,152 mg kg?1 total Pb accumulated 1,835.5–4,335.8 mg kg?1 Pb in their shoots. Under hydroponic conditions (10, 20 mg l?1 Pb), both B. asiatica and B. paniculata showed unusually high concentrations of Pb in their roots (12,133–21,667 mg kg?1) and increased biomass production. A pot experiment in a greenhouse without any soil amendments was conducted on three different soils with various Pb contents (10,652, 31,304, 89,083 mg kg?1) for 3 months. The results showed that both species of Buddleja had an increase in the biomass similar to the control plants. There was a slight decrease in survival rates of plants grown in soil with 89,083 mg kg?1 Pb content. A field trial experiment was conducted for 6 months at three sites around the Pb mine area in which plants were provided with Osmocote fertilizer. Both Buddleja species showed 100% survival, increased biomass production and phytoextraction capacity (TF 1.1–2.3) when grown in soil with Pb content of 94,584–101,405 mg kg?1. Plants accumulated 2,273–3,675 mg kg?1 Pb in their shoots. The results suggest these Buddleja plants are suitable for use in the phytoremediation of Pb-contaminated soil. 相似文献
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Meeinkuirt Weeradej Kruatrachue Maleeya Tanhan Phanwimol Chaiyarat Rattanawat Pokethitiyook Prayad 《Water, air, and soil pollution》2013,224(10):1-12
Water, Air, &; Soil Pollution - The objective of this work was to optimize the experimental conditions for adsorption of reactive azo dye using a waste-derived adsorbent, modified charcoal ash.... 相似文献
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Rattanawat Chaiyarat Rujira Suebsima Narupot Putwattana Maleeya Kruatrachue Prayad Pokethitiyook 《Water, air, and soil pollution》2011,214(1-4):383-392
Hydroponic and pot experiments were conducted to assess the uptake of heavy metals (Cd and Zn) by a common crop plant, African basil, Ocimum gratissimum. In addition, the effects of soil amendments, hydroxyapatite (HA) and cow manure on plant growth and metal accumulations were compared. In the hydroponic study, plants were exposed to various concentrations of Cd (2.5 and 5 mg L?1) and Zn (10 and 20 mg L?1) for 15 days. O. gratissimum was shown to be a Cd accumulator more than a Zn accumulator. Cadmium concentration in its shoots exceeded 100 mg kg?1. In the pot experiments, soils from a heavily Cd-contaminated site (Cd 67.9 mg kg?1 and Zn 2,886.8 mg kg?1) were treated with cow manure and HA at the rates of 10% and 20% (w/w), and 0.75 and 1.5% (w/w), respectively. Plants were grown in the greenhouse for 3 months. The addition of cow manure resulted in the highest biomass production and the lowest accumulations of Cd in plant parts, while HA was more efficient than cow manure in reducing Zn uptake. Leaves of African basil showed a decreased Cd concentration from 1.5 to 0.3 mg kg?1 (cow manure) and decreased Zn concentration from 69.3 to 34 mg kg?1 (HA). This clearly demonstrates the efficiency of HA and cow manure in reducing metal content in leaves of plants grown on high metal-contaminated soil to acceptable or close to acceptable values (0.2 mg kg?1 for Cd, 99.4 mg kg?1 for Zn). 相似文献
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