NDLI: Photodegradation of methylmercury in the water body of the Three Gorges Reservoir

Please wait, while we are loading the content...

Silafluorene moieties as promising building blocks for constructing wide-energy-gap host materials of blue phosphorescent organic light-emitting devices

Fully degradable brush polymers with polycarbonate backbones and polylactide side chains

Tunable supramolecular hydrogels from polypeptide-PEG-polypeptide triblock copolymers

Signatures of shear thinning-thickening transition in steady shear flows of dense non-Brownian yield stress systems

Mechanical and thermal properties of mesogen-jacketed liquid crystalline polymer/epoxy resin composites

Modulating the metal/organic interface via CuTCNQ decorated layer toward high performance bottom-contact single-crystal transistors

3D Co(II, III) mixed-valence metal-organic framework affording field-induced slow magnetic relaxation

Copper/cuprous sulfide electrode: preparation and performance

Optimized Ewald sum for electrostatics in molecular self-assembly systems at interfaces

Synthesis of Pt nanocatalysts for selective hydrogenation of ortho-halogenated nitrobenzene

Polydopamine-mediated immobilization of phenylboronic acid on magnetic microspheres for selective enrichment of glycoproteins and glycopeptides

Synthesis of polymer protected AuNPs for silver ions detection

Photodegradation of methylmercury in the water body of the Three Gorges Reservoir

Risk assessment of dietary exposure to PCDD/Fs, DL-PCBs and NDL-PCBs of Hong Kong resident

Science in China Series B: Chemistry : Volume 58, Issue 5, May 2015

Science in China Series B: Chemistry : Volume 58, Issue 4, April 2015

Science in China Series B: Chemistry : Volume 58, Issue 3, March 2015

Science in China Series B: Chemistry : Volume 58, Issue 2, February 2015

Science in China Series B: Chemistry : Volume 58, Issue 1, January 2015

Science in China Series B: Chemistry : Volume 57

Science in China Series B: Chemistry : Volume 56

Science in China Series B: Chemistry : Volume 55

Science in China Series B: Chemistry : Volume 54

Science in China Series B: Chemistry : Volume 53

Science in China Series B: Chemistry : Volume 52

Science in China Series B: Chemistry : Volume 51

Science in China Series B: Chemistry : Volume 50

Science in China Series B: Chemistry : Volume 49

Science in China Series B: Chemistry : Volume 48

Science in China Series B: Chemistry : Volume 47

Science in China Series B: Chemistry : Volume 46

Science in China Series B: Chemistry : Volume 45

Science in China Series B: Chemistry : Volume 44

Science in China Series B: Chemistry : Volume 43

Science in China Series B: Chemistry : Volume 42

Science in China Series B: Chemistry : Volume 41

Science in China Series B: Chemistry : Volume 40

Photodegradation of methylmercury in the water body of the Three Gorges Reservoir

Content Provider	Springer Nature Link
Author	Sun, Rongguo Wang, Dingyong Mao, Wen Zhao, Shibo Zhang, Cheng Zhang, Xiang
Copyright Year	2015
Abstract	Biogeochemical cycling of mercury in the young Three Gorges Reservoir (TGR), China, is strongly considered. Although methylmercury (MMHg) photodegradation (PD) is an important process involved in mercury cycling in this zone, little is known about this process. In situ incubation experiments were therefore performed to quantify the effect of different wavelength radiations and environmental factors on the PD process of MMHg in the water bodies of TGR. It was found that the effect of solar radiation on MMHg PD was highly dependent on wavelength and water depth. All PD-rate constants resulting from each wavelength range decreased rapidly with water depth. For surface water, UV-A radiation (320–400 nm) was the key driver, accounting for 49%–62% of MMHg PD. For the entire water column, both photosynthetically active radiation (PAR, 400–700 nm) and UV-A were responsible for MMHg PD. MMHg PD fluxes peaked in summer (7.5−18 ng m$^{−2}$ d$^{−1}$), followed by spring (3.3–8.0 ng m$^{−2}$ d$^{−1}$), autumn (1.0–2.7 ng m$^{−2}$ d$^{−1}$), and winter (0.060–0.15 ng m$^{−2}$ d$^{−1}$). The annual fluxes of MMHg PD were estimated to be 1.1–2.8 μg m$^{−2}$ a$^{−1}$. Filtering the reservoir water and amending it with chemicals (i.e., Cl$^{−}$, NO 3 − , and dissolved organic matter (DOM)) showed significant effects on MMHg PD rate constants. Stepwise regression analysis showed that intensity of solar radiation, suspended particulate matter (SPM), DOM, Cl$^{−}$, and NO 3 − were involved in the PD process. Path analysis clarified the relationship between MMHg PD rate constants and environmental variables, as well as the comparative strength of direct and indirect relationships among variables. The results are of great importance for understanding MMHg cycling characteristics in TGR and also facilitate the understanding of the underlying process, MMHg PD, in natural waters.
Starting Page	1073
Ending Page	1081
Page Count	9
File Format	PDF
ISSN	16747291
Journal	Science in China Series B: Chemistry
Volume Number	58
Issue Number	6
e-ISSN	18691870
Language	English
Publisher	Science China Press
Publisher Date	2015-04-19
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	methylmercury photodegradation influencing factor stepwise regression analysis path analysis Three Gorges Reservoir Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Dynamics of total culturable bacteria and its relationship with methylmercury in the soils of the water level fluctuation zone of the Three Gorges Reservoir

Impacts of water release operations on algal blooms in a tributary bay of Three Gorges Reservoir

Seasonal variation characteristics of water quality in the Sunxi River Watershed, Three Gorges Reservoir Area

Assessing soil heavy metal pollution in the water-level-fluctuation zone of the Three Gorges Reservoir, China.

Tempo-spatial analysis of water quality in tributary bays of the Three Gorges Reservoir region (China)

Influence of the impounding process of the Three Gorges Reservoir up to water level 172.5 m on water eutrophication in the Xiangxi Bay

Water quality analysis for the Three Gorges Reservoir, China, from 2010 to 2013

Landslide susceptibility mapping based on global and local logistic regression models in Three Gorges Reservoir area, China

Stability influencing factor of three gorges reservoir bank in Dazhou, China

Photodegradation of methylmercury in the water body of the Three Gorges Reservoir

Similar Documents

Dynamics of total culturable bacteria and its relationship with methylmercury in the soils of the water level fluctuation zone of the Three Gorges Reservoir

Impacts of water release operations on algal blooms in a tributary bay of Three Gorges Reservoir

Seasonal variation characteristics of water quality in the Sunxi River Watershed, Three Gorges Reservoir Area

Assessing soil heavy metal pollution in the water-level-fluctuation zone of the Three Gorges Reservoir, China.

Tempo-spatial analysis of water quality in tributary bays of the Three Gorges Reservoir region (China)

Influence of the impounding process of the Three Gorges Reservoir up to water level 172.5 m on water eutrophication in the Xiangxi Bay

Water quality analysis for the Three Gorges Reservoir, China, from 2010 to 2013

Landslide susceptibility mapping based on global and local logistic regression models in Three Gorges Reservoir area, China

Stability influencing factor of three gorges reservoir bank in Dazhou, China

Photodegradation of methylmercury in the water body of the Three Gorges Reservoir