Evidence map›Paper›PMID 28674956›Full record

ArticleEnvironmental science and pollution research international2017

Preparation of modified waterworks sludge particles as adsorbent to enhance coagulation of slightly polluted source water.

Wei Chen, Xiaohong Gao, Hang Xu, Kang Wang, Taoyuan Chen

Abstract read
PubMed Publisher
In one paragraph

Article in Environmental science and pollution research international, 2017. 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
–field-weighted citation impact
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.

  1. Article
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.

Wei ChenKey Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Hohai University, Nanjing, 210098, China.
Xiaohong GaoCollege of Environment, Hohai University, Nanjing, 210098, China.
Hang XuKey Laboratory of Integrated Regulation and Resource Development of Shallow Lakes, Hohai University, Nanjing, 210098, China. xuhang810826@163.com.
Kang WangCollege of Environment, Hohai University, Nanjing, 210098, China.
Taoyuan ChenCollege of Environment, Hohai University, Nanjing, 210098, China.

Funding

the Central University business expenses 2013B32314the National major water projects 2014ZX07405002the National Natural Science Foundation of China 51308185
6 · The paper itself

Abstract

Without treatment, waterworks sludge is ineffective as an adsorbent. In this study, raw waterworks sludge was used as the raw material to prepare modified sludge particles through high-temperature calcination and alkali modification. The feasibility of using a combination of modified particles and polyaluminum chloride (PAC) as a coagulant for treatment of slightly polluted source water was also investigated. The composition, structure, and surface properties of the modified particles were characterized, and their capabilities for removing ammonia nitrogen and turbidity were determined. The results indicate that the optimal preparation conditions for the modified sludge particles were achieved by preparing the particles with a roasting temperature of 483.12 °C, a roasting time of 3.32 h, and a lye concentration of 3.75%. Furthermore, enhanced coagulation is strengthened with the addition of modified sludge particles, which is reflected by reduction of the required PAC dose and enhancement of the removal efficiency of ammonia nitrogen and turbidity by over 80 and 93%, respectively. Additional factors such as pH, temperature, dose, and dosing sequence were also evaluated. The optimum doses of modified particles and PAC were 40 and 15 mg/L, respectively, and adding modified particles at the same time as or prior to adding PAC improves removal efficiency.

Indexed as

AdsorptionAluminum HydroxideFeasibility StudiesFlocculationSewageWater Pollutants, ChemicalWater PurificationAluminum Hydroxidealuminum oxychlorideSewageWater Pollutants, ChemicalAlkali modificationAmmonia nitrogenEnhanced coagulationHigh-temperature calcinationIon exchangeModified waterworks sludge particles

Identifiers

PMID28674956

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.