Evidence map›Paper›PMID 33204869›Full record

ArticleHeliyon2020

Adsorption of lead ions from wastewater using nano silica spheres synthesized on calcium carbonate templates.

Milton Manyangadze, Nyaradzai M H Chikuruwo, T Bala Narsaiah, Ch Shilpa Chakra, Gratitude Charis, Gwiranai Danha, Tirivaviri A Mamvura

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Heliyon, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
3.7field-weighted citation impact, top 7% 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

11 citing papers in PubMed, 66 citations in OpenAlex.

  1. Next Generation Calcium Nanomaterials: Disrupting Tumor CaInternational journal of nanomedicine · 2026
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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

7 authors at 3 institutions in 3 countries.

Milton ManyangadzeChemical and Process Systems Engineering Department, Harare Institute of Technology, Harare, Zimbabwe.
Nyaradzai M H ChikuruwoIndustial and Manufacturing Engineering Department, Harare Institute of Technology, Harare, Zimbabwe.
T Bala NarsaiahInstitute of Chemical Sciences and Technology, Jawaharlal Nehru Technological University, Hyderabad, India.
Ch Shilpa ChakraInstitute of Chemical Sciences and Technology, Jawaharlal Nehru Technological University, Hyderabad, India.
Gratitude CharisDepartment of Chemical, Materials and Metallurgical Engineering, College of Engineering and Technology, Botswana International University of Science and Technology, Plot 10071, Boseja Ward, Private Bag 16 Palapye, Botswana.
Gwiranai DanhaDepartment of Chemical, Materials and Metallurgical Engineering, College of Engineering and Technology, Botswana International University of Science and Technology, Plot 10071, Boseja Ward, Private Bag 16 Palapye, Botswana.
Tirivaviri A MamvuraDepartment of Chemical, Materials and Metallurgical Engineering, College of Engineering and Technology, Botswana International University of Science and Technology, Plot 10071, Boseja Ward, Private Bag 16 Palapye, Botswana.
Botswana International University of Science and Technology · BWHarare Institute of Technology · ZWJawaharlal Nehru Technological University, Hyderabad · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Lead is a heavy metal that is bio accumulative and non-biodegradable that poses a threat to our health when it exists in excess in our bloodstream. It has found its way into wastewater from mostly chemical industrial processes. In this article, we investigated the adsorption and hence removal of lead (II) ions from wastewater in order to purify it for re-use in industrial processes or for plant and animal use. We synthesized nano silica hollow spheres (NSHS) and used them as adsorbents to remove lead ions from wastewater. When we characterized the NSHS using X-Ray diffraction, the amorphous nature of silica was evident with average crystal size of 39.5 nm. Scanning electron microscopy was used to determine the morphology of the adsorbent and the particles were found to be spherical in shape within a size range of 100-200 nm. Thermogravimetric analysis was used to determine the mass loss of NSHS which was ~2% at 800 °C. Our experimental results from adsorption studies showed that there was a linear relationship between temperature (27-60 °C) and adsorption efficiency and an inverse relationship between initial metal concentration (50-300 mg/L) and adsorption efficiency. At a maximum temperature of 60 °C and maximum initial metal concentration of 300 mg/L, the adsorption capacity was 200 mg/g and 262 mg/g, respectively while the adsorption efficiency was 99.6% and 87.4%, respectively. Our equilibrium and thermodynamic results revealed that the process was better modelled by the Langmuir adsorption isotherm (q

Indexed as

AdsorptionChemical engineeringEnvironmental chemical engineeringEnvironmental pollutionEnvironmental scienceEquilibrium studiesFreundlich isothermLangmuir isothermLead ionsNano sodium silicate hollow spheresPhysical chemistrySurface chemistryThermodynamic studiesWastewater

Identifiers

PMID33204869
PMCPMC7649267
OpenAlexW3095185461

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.