Laboratory investigation on calcium nitrate induced coupling reactions between nitrogen, phosphorus, sulfur, and metals in contaminated sediments
Laboratory investigation on calcium nitrate induced coupling reactions between nitrogen, phosphorus, sulfur, and metals in contaminated sediments
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硝酸钙诱导污染沉积物中氮、磷、硫和金属之间耦合反应的实验室研究
DOI：
10.1007/s11356-021-12441-8
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发表时间：
2021-01
影响因子：
5.8
通讯作者：
Shuaishuai Gao
中科院分区：
文献类型：
--
作者：
Juan Lin;Zhen Fu;Shiming Ding;Mingyin Ren;Shuaishuai Gao
近年来，添加硝酸钙已成为一种很有前途且常用的沉积物原位修复方法。在这项研究中，过量的硝酸钙被施加到柱状沉积物，探索耦合反应的元素，如N，Fe，S和P.扩散梯度薄膜（DGT）设备被用来收集不稳定的物质在沉积物-水界面。根系取样器用于收集间隙水中的可溶性物质。结果表明，硝酸盐的加入使表层沉积物的氧化程度提高，移动的Fe、S、P和As在表层~ 10 cm沉积物中被去除。由于相应沉积物深度的硝酸盐分布不同，表层沉积物中NH3-N和可溶性活性P的消耗速率快于深层沉积物。与以往研究不同的是，本研究中可溶性铁的瞬时增加可能与自养反硝化过程中FeS的溶剂化作用有关。因此，硝酸钙对黑臭底泥的修复和内源磷的控制，其投加量应远小于141 gN/m2，略大于45.3gN/m2。
In recent years, calcium nitrate addition has become a promising and usually used method for in situ sediment remediation. In this study, excess calcium nitrate was applied to column sediments to explore the coupling reactions of elements such as N, Fe, S, and P. Diffusive gradients in thin film (DGT) devices were used to collect labile substances at the sediment-water interface. Rhizon samplers were used to collect soluble substances in interstitial water. Results showed that nitrate addition turned the surface sediment into a more oxidized state, and mobile Fe, S, P, and As were removed in surface ~ 10-cm sediment. Due to different nitrate distributions in corresponding sediment depths, the consumption rates of NH3-N and soluble reactive P were faster in the surface sediment than that in deeper layers. Different from previous researches, the transient increase of soluble Fe was observed in this study, which was probably attributed to the solvation of FeS in the autotrophic denitrification process. According to our results, we suggest that a dosage of far less than 141 g N/m2and slightly more than 45.3 g N/m2can be used for the remediation of black and odorous sediment and control of internal P by calcium nitrate.
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影响因子：
8.3
作者：
Matthews, David A.;Babcock, David B.;Kuhr, Kenneth M.
通讯作者：
Kuhr, Kenneth M.
DOI：
--
发表时间：
2016
期刊：
--
影响因子：
--
作者：
W. Ripi
通讯作者：
W. Ripi
影响因子：
2.6
作者：
J. Hansen;Kasper Reitzel;H. Jensen;F. Andersen
通讯作者：
J. Hansen;Kasper Reitzel;H. Jensen;F. Andersen
DOI：
10.1016/j.scitotenv.2019.06.406
发表时间：
2019-11
期刊：
The Science of the total environment
影响因子：
--
作者：
Yanhui Zhan;Xiaolong Wu;Jianwei Lin;Zhe Zhang;Yuying Zhao;Yang Yu;Yan Wang
通讯作者：
Yanhui Zhan;Xiaolong Wu;Jianwei Lin;Zhe Zhang;Yuying Zhao;Yang Yu;Yan Wang
影响因子：
6.2
作者：
Yan Wang;S. Ding;Lei Shi;Mengdan Gong;Shiwei Xu;Chaosheng Zhang
通讯作者：
Yan Wang;S. Ding;Lei Shi;Mengdan Gong;Shiwei Xu;Chaosheng Zhang