Behavior and fate of alkylphenols in surface water of the Jialu River, Henan Province, China.
Behavior and fate of alkylphenols in surface water of the Jialu River, Henan Province, China.
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DOI：
10.1016/j.chemosphere.2009.07.005
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发表时间：
2009-10
期刊：
影响因子：
8.8
通讯作者：
Yi-zhang Zhang;C. Tang;Xian-fang Song;Fa-dong Li
中科院分区：
文献类型：
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作者：
Yi-zhang Zhang;C. Tang;Xian-fang Song;Fa-dong Li
中国，对河南贾鲁河地表水中烷基酚的行为和归宿进行了研究。郑州市位于其上游，是该河的主要排放源，其年排放量为726公斤的壬基酚(NP)和30.2公斤的辛基酚(OP)。地表水中NP和OP的浓度范围分别为75.2~15 2 0ngL−1和2 0.9~63.2 ngL−1。为了评估AP沿河流的行为，采用了基于氯化物的质量平衡方程，因为它是相对守恒的。结果表明，沿江地表水中APs浓度的测定以稀释效应为主。在假设最优生物降解性的前提下，对潜在生物降解性的效果进行了评估。稀释和生物降解对AP浓度下降的贡献率，NP分别为38.8%和23.7%，OP分别为57.8%和24.3%。对沿河AP浓度下降的另一个贡献是吸附和气水交换的综合作用，NP为37.5%，OP为17.9%。表层水体中NP和OP的衰减半衰期分别为1.6d和2.4d。约有70.2%的总NP和24.1%的总OP最终从水相向下游的基质中消除。结果表明，下游河道是研究区AP的净汇。
The behavior and fate of alkylphenols (APs) were studied in surface water from the Jialu River, Henan Province, China. Located at its upper stream, Zhengzhou city is regarded as the major discharge source to this river with its annual effluents containing 726kg for nonylphenol (NP) and 30.2kg for octylphenol (OP). The concentrations of NP and OP in surface water ranged from 75.2 to 1520ngL−1and from 20.9 to 63.2ngL−1, respectively. To assess the behavior of APs along the river, a mass balance equation based on chloride was adopted, due to its relative conservation. The results showed that dilution effect was prevailing in determining the APs concentrations in surface water along the river. The effect of potential biodegradation was also estimated with an assumption of the optimized biodegradation. The contributions of dilution and biodegradation to the decline of APs concentrations were 38.8%, 23.7% for NP and 57.8%, 24.3% for OP, respectively. The other contribution to the decline of APs concentrations along the river was considered as an integrated effect of adsorption and air–water exchange with the values of 37.5% for NP and 17.9% for OP. The decay half-lives of NP and OP from surface water bodies were 1.6 and 2.4d, respectively. About 70.2% of total NP and 24.1% of total OP were finally eliminated from water phase to surrounding matrix in the downstream. The results suggested that the downstream river channel served as the net sink of APs in the study area.