Impact of irreversible sorption of phthalate acid esters on their sediment quality criteria
Xia, X; Zhang, J; Sha, Y; Li, J
HERO ID
1249500
Reference Type
Journal Article
Year
2012
Language
English
PMID
| HERO ID | 1249500 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Impact of irreversible sorption of phthalate acid esters on their sediment quality criteria |
| Authors | Xia, X; Zhang, J; Sha, Y; Li, J |
| Journal | Journal of Environmental Monitoring |
| Volume | 14 |
| Issue | 1 |
| Page Numbers | 258-265 |
| Abstract | The equilibrium partitioning (EqP) method has been applied to establish sediment quality criteria (SQC); however, it does not consider the nonlinear irreversible sorption of many organic contaminants. In this research, the sorption and desorption of two phthalate esters (PAEs), dimethyl phthalate (DMP) and di(2-ethylhexyl) phthalate (DEHP), in four natural sediments collected from the Yangtze River and the Yellow River were studied; the impact of irreversible sorption of DMP and DEHP on SQC has been evaluated. Based on the reversible and irreversible biphasic sorption model, the values of maximum irreversible sorption capacity (q(max)(irr)) were 125.19 μg g(-1)-337.37 μg g(-1) for DMP and 515.87 μg g(-1)-591.40 μg g(-1) for DEHP. The q(max)(irr) value was positively related to the organic carbon and black carbon contents, cation exchange capacity, and surface area of the sediments. The values of the irreversible sorption coefficient K(oc)(irr) for both DEHP and DMP in the four sediments approximated to a constant of 10(6.46 ± 0.38), which was 1-2 orders of magnitude higher than their reversible sorption coefficient K(oc)(irr). The values of SQC for PAEs based on the EqP method were modified by involving the irreversible sorption. The modified SQC of DEHP could be 2 to 20 times higher than the value predicted by the EqP method, and the assessment results for DEHP contamination in the sediments with the modified SQC were more reasonable than those with the non-modified SQC. It indicated that the current SQC based on the EqP method may be unnecessarily strict for specific organic compounds and the irreversible sorption should be taken into account. |
| Doi | 10.1039/c1em10649j |
| Pmid | 22130513 |
| Wosid | WOS:000298855800031 |
| Url | https://search.proquest.com/docview/954638420?accountid=171501 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Source: Web of Science WOS:000298855800031 |
| Is Public | Yes |
| Language Text | English |
| Keyword | Aqualine Abstracts; Water Resources Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; Environment Abstracts; Pollution Abstracts; Organic carbon; black carbon; Pollution monitoring; Sediment chemistry; Fluvial Sediments; Organic Compounds; surface area; Capacity; phthalates; Monitoring; Sediment pollution; Desorption; Contamination; Sorption; China, People's Rep., Changjiang R.; Phthalate esters; Sediment Contamination; Cations; China, People's Rep., Huang He R.; Environmental monitoring; P 2000:FRESHWATER POLLUTION; ENA 02:Toxicology & Environmental Safety; Q5 08520:Environmental quality |
| Is Qa | No |