The effect of EDTA and citric acid on phytoremediation of Cd, Cr, and Ni from soil using Helianthus annuus

Solubilidade, fracionamento e fitoextração de metais pesados após aplicação de agentes quelantes

“…Ácidos orgânicos naturais de baixo peso molecular, como os exsudados pelas raízes das plantas, influenciam solubilidade de metais pesados e sua absorção mediante formação de complexos metálicos e têm sido estudados para fitoextração (Turgut et al, 2004;Quartacci et al, 2005;. Esses ácidos orgânicos apresentam a vantagem de serem mais rapidamente degradados no solo que os quelantes sintéticos, evitando contaminação de lençóis freáticos.…”

Effect of soil amendments on phytoextraction potential of Brassica juncea growing on sewage sludge

“…Phytoremediation, defined as the use of plants to remove pollutants from the environment, which is a promising technology for remediation of contaminated soils and perhaps for the removal of metals from sludge. Unfortunately, the success of phytoremediation depends on solubility of heavy metals and ability of plant to uptake and translocate the heavy metals to the upper parts (Turgut et al 2004). Several chelating agents, such as CDTA, DTPA, EDDHA, EDDS, EDTA, EGTA, HEDTA and NTA have been studied for their ability to dissolve metals and enhance the uptake of metals by plants.…”

Heavy Metals Contaminated Soils and Phytoremediation Strategies in Taiwan

“…The application of chemical agents has significant effect on increasing the phytoavailability and accumulation of HMs of plants (Chen & Cutright, 2001;Meers et al, 2004;Meers et al, 2005). However, results of most previous studies showed that chemical agents have negative effect on the growth of Indian mustard, sunflower, or corn and thus decreased the total removal of HMs by plants (Blaylock et al, 2007;Madrid et al, 2003;Turgut et al, 2004). After the application of chemical chelating agents, the risk of groundwater contamination may be increased because the mobility of HMs increased (Jiang et al, 2003;Lai et al, 2005).…”