壬基酚在土壤中的降解和吸附特性.pdf

农业环境科学学报201130(8):1561-1566
Journal of Agro-environment Science
王基酚在土壤中的降解和吸附特性
王艳平,杨正礼,李正,任海静
(中国农业科学院农业环境与可持续发展研究所,北京100081)
摘:采用家内模拟试验,研究了王某酚(NP)在3种土壤中的降解和吸附特性。结果表明,NP在土壤中的降解分为快速和慢速
降解阶段,半衰期分别为6.74-9.72d和70.02~78.77d。降解前期3种土壤中的降解速率相差较大,依次为黑龙江黑土>北京潮土>
广西红壊,与土有机含量相一致、随培养时间推移,降解速率差异减小。NP在土壤中與有不同结合状态及异构体降解性不同可
能是出现慢速降解阶段的主要原因。土壤对NP的吸附较为符合near等温吸附方程(r0.9686),黑龙江.黑土、北京潮土和广西
红壤中吸附常数K值分别为65.52、31.66和32.71,黑龙江.黑土对NP的吸附最强,广西红壤和北京潮土的吸附能力較为接近。各
土壤理化性质参数中,以土壤有机质含量对NP吸附的影响最大(r=0.9950),阳离子交换量对吸附也有一定影响,粘粒含量和pH
对吸附的影响较小。NP在3种土壤中的有机碳吸附常数Kc在3696.22-4334.51之间,移动性很弱,吸附自由能变化均小于40
kJ-mol-,NP在土壊中的吸附以物理吸附为主。
关键词:壬基酚;土壤:降解:吸附
中图分类号:X53文献标志码:A文章编号:1672-2043(201108-1561-06
Degradation and Adsorption of Nonylphenol in Soils
WANG Yan-ping, YANG Zheng-li, LI Zheng, REN Hai-jing
(Ins ute of Aelual Enviment and Sustinable Development hinese Academy of A ural Sciences, Beijing 100081,China)
Abstract: Nonylphenol NP)as one degradation intermediate of widely used io actas u wies read in theenvrment. The
objective of his study is an ify edain an ad o n of NP in three ils using he th mos atic cultivation approach and the batch
equilibrium approach, respecti. It was showed that the degradation of NP was ivided into fasl-degradation phase and slow-degradation
ph an de a w a w 6.. 7d an 700787d i Lsil rely. The aa
tion ales of three soil was i rent in te ay degradation phase fo lowing er: Heilongjiang black soi> ng fluvo-aquic soil>Guangxi
red oil, which was consent with the soil or anic mater conen However, the ga among degraation rates narwin w h the cultiva-
tion time going on. The dif nt cobination s es of NP with ss and if ent de abilities of various NP isomers might the main rea
o w e T P n s w e th x ien ial concentrations resulted
in Linearly fited stems with a op on cons an(K ranged m 3]. 6 to 65 5 NP was most easily a ed by the Heilongjiang lack
soil Adso ion of NP was rimarily relate sl rg matter onen, Si K a frm. 24334.51 hree sils, NP was not
easy o migrate in soil. The adom t on of P y sil el n ed o p s i p ion with changes of ee energy less than 40 k J m.
.eywords: nonylphenol; soil; degradation; adsorption
壬基酚(NP)是非离子表面活性剂王基酚聚氧乙业(杀虫剂)和日常生活(洗涤剂、家用洗化用品)领
烯( NPEON)的合成原料及降解产物。 NPEON作为域。与母体相比,由于NP较难继续降解,毒性增加,
洗涤剂、乳化剂、润湿剂、扩散剂、稳定剂等助剂,被广亲脂性增强,易在沉积物及生物体中富集?,且具有内
泛应用于工业(如纺织、塑料、造纸、治金、石油等)、农分泌干扰作用匀。
目前,国外已有一些关于NP在污泥回用土壤中
收稿日期:2011~-02-16
归趋行为的报道?,而内在此方面的研究较少I0-l
盒项目:家科技基础性工作专项(2007FY210200
本研究采用室内试验,对NP在土壊中的降解及吸附
作者介:王枪平(198トー)、女,山东聊城人,士生?主要从事农业有特性进行分析,旨在为评价其在环境中的安全性提供
机污染削研究。E-mail:yanping(0]26.com
通讯作蓍:杨止礼E-mail:yangz426(126.com
科学依据。
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