Nitrous oxide supersaturation at the liquid/air interface of animal waste

被引：1

作者：

Makris, Konstantinos C. ^{[1
]}

Andra, Syam S. ^{[2
]}

Hardy, Michael ^{[3
]}

Sarkar, Dibyendu ^{[3
]}

Datta, Rupali ^{[4
]}

Bach, Stephan B. H. ^{[5
]}

Mullens, Conor P. ^{[5
]}

机构：

[1] Harvard Univ, Sch Publ Hlth, Cyprus Int Inst Environm & Publ Hlth, CY-1105 Nicosia, Cyprus

[2] Univ Texas San Antonio, Environm Geochem Lab, San Antonio, TX USA

[3] Montclair State Univ, Dept Earth & Environm Studies, Montclair, NJ USA

[4] Michigan Technol Univ, Dept Biol Sci, Houghton, MI USA

[5] Univ Texas San Antonio, Dept Chem, San Antonio, TX USA

来源：

ENVIRONMENTAL POLLUTION | 2009年 / 157卷 / 12期

关键词：

Animal waste; Henry constant; Lagoons; Liquid/air interface; Nitrous oxide; Supersaturation; MULTIPLE HEADSPACE EXTRACTION; N2O; SOLUBILITY; EMISSION; FATE;

D O I：

10.1016/j.envpol.2009.06.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Concentrated animal feeding operations around the globe generate large amounts of nitrous oxide (N2O) in the surrounding atmosphere. Liquid animal waste systems have received little attention with respect to N2O emissions. We hypothesized that the solution chemistry of animal waste aqueous suspensions would promote conditions that lead to N2O supersaturation at the liquid/air interface. The concentration of dissolved N2O in poultry litter (PL) aqueous suspensions at 25 degrees C was 0.36 mu g N2O mL(-1), at least an order of magnitude greater than that measured in water in equilibrium with ambient air, suggesting N2O supersaturation. There was a nonlinear increase in the N2O Henry constants of PL from 2810 atm/mole fraction at 35 degrees C to 17 300 atm/mole fraction at 41 degrees C. The extremely high N2O Henry constants were partially ascribed to N2O complexation with aromatic moieties. Complexed N2O structures were unstable at temperatures >35 degrees C, supplying the headspace with additional free N2O concentrations. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：3508 / 3513

页数：6

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