Evidence map›Paper›PMID 33638085›Full record

ArticleEnvironmental science and pollution research international2021

The geochemical behavior of trace metals and nutrients in submerged sediments of the Three Gorges Reservoir and a critical review on risk assessment methods.

Bin Wang, Shu Chen, Yuwei Chen, Nelson Belzile, Rui Zheng, Yuankun Yang, Kaibin Fu, Yongcan Chen, Binliang Lin, Zhaowei Liu and 1 more

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Article in Environmental science and pollution research international, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

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Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

11 authors.

Bin WangSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Shu ChenSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China. crick_chen@hotmail.com.
Yuwei ChenSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Nelson BelzileSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Rui ZhengSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Yuankun YangSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Kaibin FuSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Yongcan ChenSchool of Environment and Resource, Southwest University of Science and Technology, Mianyang, 621010, China.
Binliang LinState Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China.
Zhaowei LiuState Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China.
Jian SunState Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China.

Funding

Key Research and Development Program in Sichuan Province 2019YFS0055Key Science and Technology Special Project in Sichuan Province 2018SZDZX0026the National Key R&D Program of China 2016YFC0502204
6 · The paper itself

Abstract

Permanently submerged sediment samples (SS) were collected in the center stream of eleven tributaries of Changjiang (Yangtze River) and at eight confluence zones in the Three Gorges Reservoir (TGR) in May and December of 2017. The work showed that aqua regia digestion is a simpler, more reliable and robust method compared to total digestion with hydrofluoric acid (HF) for the determination of trace metals (TMs) in sediment for risk assessment purpose. Our study revealed a remarkable accumulation of TMs at the confluence zones and a trend of their gradual increase toward this zone. The presence of iron and manganese (oxy)hydroxides combined with hydrodynamic conditions created by the Three Gorges Dam (TGD) and its operation are believed to play a crucial role. This work also found that concentrations of [Formula: see text] in May sediment were significantly higher than those in December, which could have been caused by both the cyclic hydrodynamic conditions and the warmer water. TOC and TP were both very low in the sediment. Although TN was 2 times higher than the Lowest Effect Level suggested by the Ontario Ministry of Environment, it is uncertain if it reflects a natural background level or due to anthropogenic activities. A critical discussion is made by comparing the conclusions obtained when using different TMs risk assessment models. Necessary precautions are highly recommended when performing this exercise. In this study, no significant risk from either TMs or nutrients was identified.

Indexed as

NutrientsRisk assessmentsSpatial and seasonal variations, Submerged sedimentsThree Gorges ReservoirTrace metals

Identifiers

PMID33638085

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