In-situ immobilization of lead using different source of phosphate amendments for the organic production of misai kucing (Orthosiphon stamineus)

Mulana, Khairun Naim; Ishak, Che Fauziah; Bakar, Rosenani Abu

doi:10.25252/se/17/31091

Cited by 1 publication

(1 citation statement)

References 20 publications

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“…The best effects were obtained with P 1 (Ca(H 2 PO 4 ) 2 ), which confirmed the successful ligand immobilization of divalent PTEs and so, the lowest accumulation of PTEs [25,53,54]. Moreover, Ca(H 2 PO 4 ) 2 is gradually transformed into more stable phosphates like octocalcium phosphates and apatites, which are known for their reactivity towards PTEs like Pb to form stable phosphates such as pyromorphite, unavailable for plants [30,42,55]. On the other hand, it can react with Fe, Al, and Ca to form secondary P minerals by precipitation [56].…”

Section: Concentrations Of Transition Alkali and Alkaline Earth Metmentioning

confidence: 63%

Benefits of Ryegrass on Multicontaminated Soils Part 1: Effects of Fertilizers on Bioavailability and Accumulation of Metals

Waterlot

Hechelski

2019

Sustainability

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Effects of three phosphorus fertilizers on the shoot biomass and on the accumulation of alkali, alkaline earth, and transition metals in the shoots and roots of ryegrass were studied with two contaminated garden soils. Phosphates were added in sustainable quantities in order to reduce the environmental availability of carcinogenic metals (e.g., Cd and Pb) and to enhance the bioavailability of alkali and alkaline earth metals as well as micronutrients needed by plants. Addition of Ca(H2PO4)2 was the most convenient way to (i) limit the concentration of Cd and Pb, (ii) keep constant the transfer of macro- and micronutrient from the soil to the ryegrass shoots, (iii) decrease the availability of metals, and (iv) increase the ratio values between potential Lewis acids and Cd or Pb in order to produce biosourced catalysis. For instance, the real phytoavailability was reduced by 27%–57% and 64.2%–94.8% for Cd and Pb, respectively. Interestingly, the real phytoavailability of Zn was the highest in the least contaminated soils. Even if soils were highly contaminated, no visual toxicity symptoms were recorded in the growing ryegrasses. This indicates that ryegrass is suitable for the revegetation of contaminated gardens. To promote the sustainable ryegrass production on contaminated soils for production of new organic fragrance and drugs in green processes according to REACH (Registration, Evaluation, Authorisation, and Restriction of Chemicals) regulation, two processes should be recommended: assisted phytostabilization of the elements, and then assisted phytoextraction by using chelators.

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Section: Concentrations Of Transition Alkali and Alkaline Earth Metmentioning

confidence: 63%

Benefits of Ryegrass on Multicontaminated Soils Part 1: Effects of Fertilizers on Bioavailability and Accumulation of Metals

Waterlot

Hechelski

2019

Sustainability

View full text Add to dashboard Cite

show abstract

In-situ immobilization of lead using different source of phosphate amendments for the organic production of misai kucing (Orthosiphon stamineus)

Abstract: Abstract

Cited by 1 publication

References 20 publications

Benefits of Ryegrass on Multicontaminated Soils Part 1: Effects of Fertilizers on Bioavailability and Accumulation of Metals

Benefits of Ryegrass on Multicontaminated Soils Part 1: Effects of Fertilizers on Bioavailability and Accumulation of Metals

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