2018
DOI: 10.1021/acs.estlett.8b00246
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Plant-Induced Changes to Rhizosphere pH Impact Leaf Accumulation of Lamotrigine but Not Carbamazepine

Abstract: Many ionizable organic contaminants (IOCs) are present in treated wastewater used to irrigate edible crops and accumulate in plants under field conditions. Phytoavailability of IOCs with pK a values between 4 and 9 may be affected by the pH of the rhizosphere (the water and soil within 2–3 mm of the root surface). Plants can alter rhizosphere pH by 2–3 units in either direction in response to nutrient availability. The effects of plant modulation of rhizosphere pH on IOC accumulation have not been previously r… Show more

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Cited by 14 publications
(18 citation statements)
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“…The presence of positively charged UO 2 2+ was negligible under all treatments, and only 0.1–0.5% of UO 2 –OH were predicted to be present. The enhancement of U root-to-shoot translocation in the presence of neutrally charged Ca–U–CO 3 is in good agreement with previous studies showing that neutral molecules are more readily transported from the roots to the shoots than charged molecules …”
Section: Resultssupporting
confidence: 92%
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“…The presence of positively charged UO 2 2+ was negligible under all treatments, and only 0.1–0.5% of UO 2 –OH were predicted to be present. The enhancement of U root-to-shoot translocation in the presence of neutrally charged Ca–U–CO 3 is in good agreement with previous studies showing that neutral molecules are more readily transported from the roots to the shoots than charged molecules …”
Section: Resultssupporting
confidence: 92%
“…The enhancement of U root-to-shoot translocation in the presence of neutrally charged Ca–U–CO 3 is in good agreement with previous studies showing that neutral molecules are more readily transported from the roots to the shoots than charged molecules. 36…”
Section: Resultsmentioning
confidence: 99%
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“…The frequency of detection was 100% for hydrochlorothiazide, carbamazepine, metoprolol, clarithromycin, acesulfame, sucralose, citalopram and climbazole and 25% for benzotriazole, while diclofenac, ciprofloxacin, irbesartan and valsartan were never detected. All these compounds were usually detected in higher concentrations in spring/summer than fall/winter, which confirmed a good correlation between crop transpiration and crop accumulation (Nason et al, 2018).…”
Section: Resultssupporting
confidence: 67%
“…This lagoon-based TWW was characterized by a high DOM content (> 200 mg/L) which could prone interactions between DOM and ionizable PPCPs as well as by a high content of ammonium ions (> 50 mg/L) which could lead to rhizosphere acidification due to excess cations plant uptake over anions uptake. This acidification process could result in loss of two pH units (Nason et al, 2018). This had strong implication for compound such as climbazole with a pKa of 7.5 because at pH 5.6, it would have been 100% ionized limiting its possible plant uptake while at pH 7.6 both neutral and cationic J o u r n a l P r e -p r o o f…”
Section: Resultsmentioning
confidence: 99%