Evidence map›Paper›PMID 34402009›Full record

ArticleEnvironmental science and pollution research international2022

Influence of aquifer heterogeneity on Cr(VI) diffusion and removal from groundwater.

Weidong Zhao, Xinxiang Huang, Jianshi Gong, Lei Ma, Jiazhong Qian

Abstract read
PubMed Publisher
In one paragraph

Article in Environmental science and pollution research international, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
0.5field-weighted citation impact, top 38% of its field
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

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

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

1 citing paper in PubMed, 6 citations in OpenAlex.

  1. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Weidong ZhaoSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
Xinxiang HuangSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
Jianshi GongNanjing Geological Survey Center, China Geological Survey, Nanjing, 210016, China.
Lei MaSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China. Lei8505@hfut.edu.cn.ORCID http://orcid.org/0000-0003-3339-8740
Jiazhong QianSchool of Resources and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China.
Hefei University of Technology · CNChina Geological Survey · CN

Funding

China Geological Survey (CN) No. DD20190354Key Programme No. 41831289National Natural Science Foundation of China No. 42072276
6 · The paper itself

Abstract

Previous studies have indicated aquifer heterogeneity has an important influence on the removal of Cr(VI) in groundwater, but little attention is paid to the effects of aquifer heterogeneity during the process especially under conditions like actual groundwater temperature and hydraulic gradient in the field. Thus, in this study, in situ remediation of Cr(VI)-contaminated shallow groundwater in a sandbox was conducted, and the influences of the heterogeneous aquifer composed of coarse, medium, and fine sand on Cr(VI) diffusion and removal before and after emulsified vegetable oil (EVO) injection were investigated, under the conditions of 19±0.5 °C and hydraulic gradient 3‰. The results show that Cr(VI) diffused consistently with groundwater from top left to bottom right; Cr(VI) spread faster in the horizontal direction than in vertical direction, and the horizontal diffusion of Cr(VI) in coarse, medium, and fine sand was 0.054 m/day, 0.036 m/day, and 0.018 m/day, respectively; a high performance of EVO toward Cr(VI) removal by over 95% was mainly because different concentrations of microorganisms migrated among heterogeneous aquifers vertically and horizontally; compared with coarse and medium sand, fine sand, with a better adsorption capacity and a lower permeability, retained relatively more microorganisms, providing favorable conditions during the remediation; a stable and unified effective removal zone, similar to the shape of Ʃ (approximately 1357.87 cm

Indexed as

GroundwaterWater Pollutants, ChemicalAdsorptionChromiumDiffusionChromiumchromium hexavalent ionWater Pollutants, ChemicalBiodegradationCr(VI) removalEmulsified vegetable oilGroundwaterHeterogeneityPermeable reactive barrier

Identifiers

PMID34402009
OpenAlexW3160988936

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.