期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 57, 期 9, 页码 3681-3688出版社
AMER CHEMICAL SOC
DOI: 10.1021/jf803917w
关键词
Plant cuticle; surfactant; sorption; organic pollutant; plasticizing effect; enhancement solubilization
资金
- National Natural Science Foundation of China [40671168, 20737002, 20577041]
- program for New Century Excellent Talents in University [NCET-05-0525]
- FANEDD [200765]
To precisely predict organics accumulation and crop safety, the affinity of fruit cuticles for naphthalene and 1-naphthol was investigated with the presence of three surfactants below and above the critical micelle concentration (CIVIC), including anionic sodium dodecylbenzene sulfonate (SDBS), cationic cetyltrimethylammonium bromide (CTMAB), and nonionic polyoxyethylene (20) sorbitan monolaurate (Tween 20). Tomato and apple cuticles with distinct compositions were selected. With increasing SDBS concentrations, apparent sorption coefficients (K-d*) of 1-naphthol by both cuticles first increased a bit and then decreased slightly. The K-d* of naphthalene by tomato cuticle is sensitive to SDBS concentration with a sharp increase and then decrease, whereas SDBS has little effect on naphthalene K-d* by apple cuticle. For CTMAB with lower CIVIC, the naphthalene K-d* decreased more quickly. Tween 20 seems to be ineffective on naphthalene sorption by both cuticles. Nevertheless, the intrinsic sorption coefficients (K-d) were almost promoted by the coexisting surfactants, resulting from the cuticle-sorbed surfactant's plasticizing effect.
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