Long-term monitoring and modeling of the mass transfer of polychlorinated biphenyls in sediment following pilot-scale in-situ amendment with activated carbon
Long-term monitoring and modeling of the mass transfer of polychlorinated biphenyls in sediment following pilot-scale in-situ amendment with activated carbon
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DOI：
10.1016/j.jconhyd.2011.09.009
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发表时间：
2012-03-15
影响因子：
3.6
通讯作者：
Luthy, Richard G.
中科院分区：
文献类型：
--
作者：
Cho, Yeo-Myoung;Werner, David;Luthy, Richard G.
本文报告了在美国加利福尼亚州旧金山湾猎人角造船厂附近的潮间带泥滩上原位放置活性炭 (AC) 以稳定多氯联苯 (PCB) 后五年的后处理监测结果。五年后，沉积物岩心的 AC 水平与早期采样时间的水平相当。被动采样器的吸收验证了 AC 修正的好处，具有很强的局部吸附剂剂量响应关系。五年后，采用 3.7 干重% AC 剂量时，被动采样器中的 PCB 吸收量下降了 73%，证实了修正效益的暂时增强，一个月内观察到的 4.4% 剂量时，PCB 吸收量减少了 19%。借助 PCB 传质模型讨论了 AC 的长期有效性、局部 AC 剂量响应、NOM 结垢的影响、AC 掺入的空间异质性以及平流沉积物孔隙水运动的影响。模型和实验结果表明，活性炭在沉积物中的均匀掺入将显着加速处理效果。 (C) 2011 Elsevier B.V. 保留所有权利。
The results of five years of post-treatment monitoring following in-situ activated carbon (AC) placement for stabilization of polychlorinated biphenyls (PCBs) at an inter-tidal mudflat adjacent to Hunters Point Shipyard, San Francisco Bay, CA, USA are reported in this paper. After five years, AC levels of the sediment cores were comparable to those at earlier sampling times. Passive sampler uptake validated the benefit of the AC amendment with a strong local sorbent dose-response relationship. The PCB uptakes in passive samplers decreased up to 73% with a 3.7 dry wt.% AC dose after five years, confirming the temporal enhancement of the amendment benefit from a 19% reduction with a 4.4% dose observed within one month. The long-term effectiveness of AC, the local AC dose response, the impact of fouling by NOM, the spatial heterogeneity of AC incorporation, and the effects of advective sediment pore-water movement are discussed with the aid of a PCB mass transfer model. Modeling and experimental results indicated that the homogeneous incorporation of AC in the sediment will significantly accelerate the benefit of the treatment. (C) 2011 Elsevier B.V. All rights reserved.