A new DGT technique comprised in a hybrid sensor for the simultaneous measurement of ammonium, nitrate, phosphorus and dissolved oxygen

	A new DGT technique comprised in a hybrid sensor for the simultaneous measurement of ammonium, nitrate, phosphorus and dissolved oxygen
	Ren, Mingyi; Ding, Shiming; Shi, Dan; Zhong, Zhilin; Cao, Jingxin; Yang, Liyuan; Tsang, Daniel C. W.; Wang, Dan; Zhao, Donghua; Wang, Yan
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020
卷号	725
英文摘要	A new diffusive gradients in thin films technique (ZrO-AT DGT) with zirconium oxide, A-62 MP and T-42H resins containing in a single binding gel was developed for simultaneous measurement of nitrate (NO3-N), ammonium (NH4-N) and phosphate (PO4-P). The DGT uptake was found to be independent of pH variation from 3.2-8.7. Ionic strengths below 5, 10 and 750 mmol.L-1 NaCl did not affect DGT uptake of NH4-N, NO3-N and PO4-P, respectively. This new DGT was deployed in natural freshwater environments, with in situ measurements of the three nutrients found to be accurate. It ensured that rinsing the exposed surface of the DGT device at 3-day intervals can prevent biofouling. Additionally, a hybrid sensor comprising the novel DGT binding layer overlying an O-2 planar optrode was tested in sediments to evaluate the dynamics of O-2 and the three nutrients. Results showed that PO4-P and NO3-N fluxes decreased while fluxes of NH4-N increased under aerobic conditions. Nearly simultaneous variation in O-2 and NO3-N was observed at the sediment-water interface (SWI) and transformation of NO3-N and PO4-P was found to be sensitively influenced by O-2 dynamics. (C) 2020 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://159.226.73.51/handle/332005/20273]
专题	中国科学院南京地理与湖泊研究所
推荐引用方式 GB/T 7714	Ren, Mingyi,Ding, Shiming,Shi, Dan,et al. A new DGT technique comprised in a hybrid sensor for the simultaneous measurement of ammonium, nitrate, phosphorus and dissolved oxygen[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,725.
APA	Ren, Mingyi.,Ding, Shiming.,Shi, Dan.,Zhong, Zhilin.,Cao, Jingxin.,...&Wang, Yan.(2020).A new DGT technique comprised in a hybrid sensor for the simultaneous measurement of ammonium, nitrate, phosphorus and dissolved oxygen.SCIENCE OF THE TOTAL ENVIRONMENT,725.
MLA	Ren, Mingyi,et al."A new DGT technique comprised in a hybrid sensor for the simultaneous measurement of ammonium, nitrate, phosphorus and dissolved oxygen".SCIENCE OF THE TOTAL ENVIRONMENT 725(2020).