Activated carbon adsorption of chloroacetanilide herbicides and their degradation products from surface water supplies

Gustafson, David I.; Carr, Katherine H.; Carson, David B.; Fuhrman, John D.; Hackett, Amy G.; Hoogheem, Thomas J.; Snoeyink, Vernon L.; Curry, Michael L.; Heijman, S.G.J.; Chen, Sunmao; Hertl, P. T.; Wesenbeeck, Ian van

doi:10.2166/aqua.2003.0041

Cited by 9 publications

(4 citation statements)

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“…Only five TPs were easier to remove via PAC adsorption than their parent pesticides (R PAC < 0.8). Gustafson et al (2003) have also reported the same pattern. A TP is typically more polar than its parent compound (Benner et al 2013, Fenner et al 2013).…”

Section: Pac Adsorptionsupporting

confidence: 61%

“…Removal of pesticide TPs during drinking water treatment has also attracted attention. Removals are estimated by quantifying and comparing the concentrations in raw and finished waters in full-scale drinking water treatment plants (Coupe and Blomquist 2004) or investigated in laboratory-scale experiments (Gustafson et al 2003, Hladik et al 2005.…”

Section: Introductionmentioning

confidence: 99%

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Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination

et al. 2018

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Removal efficiencies of 28 pesticide transformation products (TPs) and 15 parent pesticides during steps in drinking water treatment (coagulation-sedimentation, activated carbon adsorption, and ozonation) were estimated via laboratory-scale batch experiments, and the mechanisms underlying the removal at each step were elucidated via regression analyses. The removal via powdered activated carbon (PAC) treatment was correlated positively with the log K at pH 7. The adjusted coefficient of determination (r) increased when the energy level of the highest occupied molecular orbital (HOMO) was added as an explanatory variable, the suggestion being that adsorption onto PAC particles was largely governed by hydrophobic interactions. The residual error could be partly explained by π-π electron donor-acceptor interactions between the graphene surface of the PAC particles and the adsorbates. The removal via ozonation correlated positively with the energy level of the HOMO, probably because compounds with relatively high energy level HOMOs could more easily transfer an electron to the lowest unoccupied molecular orbital of ozone. Overall, the TPs tended to be more difficult to remove via PAC adsorption and ozonation than their parent pesticides. However, the TPs that were difficult to remove via PAC adsorption did not induce strong mutagenicity after chlorination, and the TPs that were associated with strong mutagenicity after chlorination could be removed via PAC adsorption. Therefore, PAC adsorption is hypothesized to be an effective method of treating drinking water to reduce the possibility of post-chlorination mutagenicity associated with both TPs and their parent pesticides.

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Section: Pac Adsorptionsupporting

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination

et al. 2018

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“…Activated carbon treatment also reduced degradate concentrations, but less than for parent. This is likely due to the more polar nature of these degradates, as detailed in a recent laboratory study (Gustafson et al, 2003), which showed that 90 to 95% of the parent herbicides and 40 to 80% of the acetanilide degradates were removed from a variety of water sources using PAC at 20 mg L −1 and a contact time of 60 min.…”

Section: Resultsmentioning

confidence: 95%

The Acetochlor Registration Partnership Surface Water Monitoring Program for Four Corn Herbicides

et al. 2005

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A surface drinking water monitoring program for four corn (Zea mays L.) herbicides was conducted during 1995-2001. Stratified random sampling was used to select 175 community water systems (CWSs) within a 12-state area, with an emphasis on the most vulnerable sites, based on corn intensity and watershed size. Finished drinking water was monitored at all sites, and raw water was monitored at many sites using activated carbon, which was shown capable of removing herbicides and their degradates from drinking water. Samples were collected biweekly from mid-March through the end of August, and twice during the off-season. The analytical method had a detection limit of 0.05 microg L(-1) for alachlor [2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)-acetamide] and 0.03 microg L(-1) for acetochlor [2-chloro-N-(ethoxymethyl)-N-(2-ethyl-6-methylphenyl)-acetamide], atrazine [6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine], and metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)-acetamide]. Of the 16528 drinking water samples analyzed, acetochlor, alachlor, atrazine, and metolachlor were detected in 19, 7, 87, and 53% of the samples, respectively. During 1999-2001, samples were also analyzed for the presence of six major degradates of the chloroacetanilide herbicides, which were detected more frequently than their parent compounds, despite having higher detection limits of 0.1 to 0.2 microg L(-1). Overall detection frequencies were correlated with product use and environmental fate characteristics. Reservoirs were particularly vulnerable to atrazine, which exceeded its 3 microg L(-1) maximum contaminant level at 25 such sites during 1995-1999. Acetochlor annualized mean concentrations (AMCs) did not exceed its mitigation trigger (2 microg L(-1)) at any site, and comparisons of observed levels with standard measures of human and ecological hazards indicate that it poses no significant risk to human health or the environment.

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“…Activated carbons are also used for removing toxic or contaminants such as dyes, herbicides, pesticides, phenol, defluorinated compounds, nitrate, and residual chlorine from water. [84,87,[160][161][162][163][164] Activated carbons prepared from corn cob are very effective in removing methylene blue dyes from aqueous solutions. [87] Rice husk carbon could also be a promising alternative adsorbent for precious metals recovery from industrial waste using chloride solution.…”

Section: Effect Of Chemical Composition Of Biomass Carbon Precursorsmentioning

confidence: 99%

Textural characteristics of activated carbons prepared from agricultural residues‐review

et al. 2023

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Agricultural residues are the most available biomass resources in the world and can be exploited to produce various activated carbons at low cost. The textural properties of activated carbon, including surface area, pore size, pore size distribution, and certain surface functionalities are the main factors in the application of bio‐based electrode materials for energy storage devices and electrochemical catalyst for CO2 reduction reactions, gas adsorption and separation, in water and wastewater treatment. This paper reviews the physical characteristics of activated carbons produced from various biomass resources using different methods. The effects of different activation methods, sources of biomass, and other parameters on the surface properties such as specific surface area and pore volume of activated carbon are discussed. The differences in the characteristics of activated carbon made from different agricultural biomass resources under the same parameters are evaluated. Eventually, the application of abundant agricultural residues for fabricating supercapacitors' electrode materials is also discussed.

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Activated carbon adsorption of chloroacetanilide herbicides and their degradation products from surface water supplies

Cited by 9 publications

References 0 publications

Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination

Removals of pesticides and pesticide transformation products during drinking water treatment processes and their impact on mutagen formation potential after chlorination

The Acetochlor Registration Partnership Surface Water Monitoring Program for Four Corn Herbicides

Textural characteristics of activated carbons prepared from agricultural residues‐review

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