Feasibility of using drinking water treatment residuals as a novel chlorpyrifos adsorbent

Yuanyuan Zhao, Changhui Wang, Laura A. Wendling, Yuansheng Pei

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

Abstract

Recent efforts have increasingly focused on the development of low-cost adsorbents for pesticide retention. In this work, the novel reuse of drinking water treatment residuals (WTRs), a nonhazardous ubiquitous byproduct, as an adsorbent for chlorpyrifos was investigated. Results showed that the kinetics and isothermal processes of chlorpyrifos sorption to WTRs were better described by a pseudo-second-order model and by the Freundlich equation, respectively. Moreover, compared with paddy soil and other documented absorbents, the WTRs exhibited a greater affinity for chlorpyrifos (log Koc = 4.76-4.90) and a higher chlorpyrifos sorption capacity (KF = 5967 mg 1-n·L·kg-1) owing to the character and high content of organic matter. Further investigation demonstrated that the pH had a slight but statistically insignificant effect on chlorpyrifos sorption to WTRs; solution ionic strength and the presence of low molecular weight organic acids both resulted in concentration-dependent inhibition effects. Overall, these results confirmed the feasibility of using WTRs as a novel chlorpyrifos adsorbent.

Original languageEnglish
Pages (from-to)7446-7452
Number of pages7
JournalJournal of Agricultural and Food Chemistry
Volume61
Issue number31
DOIs
Publication statusPublished - 7 Aug 2013
MoE publication typeA1 Journal article-refereed

Fingerprint

Chlorpyrifos
Water Purification
chlorpyrifos
adsorbents
water treatment
Water treatment
Drinking Water
Adsorbents
drinking water
sorption
Sorption
absorbents
paddy soils
Organic acids
ionic strength
Ionic strength
Pesticides
Biological materials
Osmolar Concentration
byproducts

Keywords

  • chlorpyrifos sorption
  • kinetics
  • paddy soil
  • solution chemistry
  • water treatment residuals

Cite this

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title = "Feasibility of using drinking water treatment residuals as a novel chlorpyrifos adsorbent",
abstract = "Recent efforts have increasingly focused on the development of low-cost adsorbents for pesticide retention. In this work, the novel reuse of drinking water treatment residuals (WTRs), a nonhazardous ubiquitous byproduct, as an adsorbent for chlorpyrifos was investigated. Results showed that the kinetics and isothermal processes of chlorpyrifos sorption to WTRs were better described by a pseudo-second-order model and by the Freundlich equation, respectively. Moreover, compared with paddy soil and other documented absorbents, the WTRs exhibited a greater affinity for chlorpyrifos (log Koc = 4.76-4.90) and a higher chlorpyrifos sorption capacity (KF = 5967 mg 1-n·L·kg-1) owing to the character and high content of organic matter. Further investigation demonstrated that the pH had a slight but statistically insignificant effect on chlorpyrifos sorption to WTRs; solution ionic strength and the presence of low molecular weight organic acids both resulted in concentration-dependent inhibition effects. Overall, these results confirmed the feasibility of using WTRs as a novel chlorpyrifos adsorbent.",
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Feasibility of using drinking water treatment residuals as a novel chlorpyrifos adsorbent. / Zhao, Yuanyuan; Wang, Changhui; Wendling, Laura A.; Pei, Yuansheng.

In: Journal of Agricultural and Food Chemistry, Vol. 61, No. 31, 07.08.2013, p. 7446-7452.

Research output: Contribution to journalArticleScientificpeer-review

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AU - Wang, Changhui

AU - Wendling, Laura A.

AU - Pei, Yuansheng

PY - 2013/8/7

Y1 - 2013/8/7

N2 - Recent efforts have increasingly focused on the development of low-cost adsorbents for pesticide retention. In this work, the novel reuse of drinking water treatment residuals (WTRs), a nonhazardous ubiquitous byproduct, as an adsorbent for chlorpyrifos was investigated. Results showed that the kinetics and isothermal processes of chlorpyrifos sorption to WTRs were better described by a pseudo-second-order model and by the Freundlich equation, respectively. Moreover, compared with paddy soil and other documented absorbents, the WTRs exhibited a greater affinity for chlorpyrifos (log Koc = 4.76-4.90) and a higher chlorpyrifos sorption capacity (KF = 5967 mg 1-n·L·kg-1) owing to the character and high content of organic matter. Further investigation demonstrated that the pH had a slight but statistically insignificant effect on chlorpyrifos sorption to WTRs; solution ionic strength and the presence of low molecular weight organic acids both resulted in concentration-dependent inhibition effects. Overall, these results confirmed the feasibility of using WTRs as a novel chlorpyrifos adsorbent.

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