Microbial pollution of water with special reference to coliform bacteria and their nexus with environment

Some, Sudip; Mondal, Rittick; Mitra, Debasis; Jain, Divya; Verma, Devvret; Das, Samanwita

doi:10.1016/j.nexus.2021.100008

Cited by 118 publications

(65 citation statements)

References 74 publications

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“…It has been observed that the number of bacterial colonies identified as coliform (purple colonies) [ 53 , 54 ] on the bare PSF membrane was higher than that of PSF blended with nAg. Figure 8 b–d clearly show that the number of bacterial colonies on the membrane surface containing nAg decreased compared to the bare PSF membranes.…”

Section: Resultsmentioning

confidence: 99%

Study Effect of nAg Particle Size on the Properties and Antibacterial Characteristics of Polysulfone Membranes

Prihandana

Sriani²,

Muthi’ah

et al. 2022

Nanomaterials

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Polysulfone ultrafiltration membranes were fabricated using various sizes (20, 40, and 90–210 nm) of silver nanoparticles (nAg) blended in a dope solution. To characterize the performance and properties of the prepared membranes, scanning electron microscopy (SEM), water contact angle, protein separation, water flux, and antibacterial tests were conducted. The characterization results revealed that when nAg particles (20 nm) were blended into the base polymer PSF, the PSF/nAg blended membrane had the lowest contact angle (58.5°) and surface energy (110.7 mN/m). When experimenting with ultrafiltration using protein solutions, bare PSF and PSF/nAg-20 blended membranes gave similar values of protein rejection: 93% of bovine serum albumin (BSA) and 70% of lysozyme rejection. Furthermore, SEM studies showed that the surface pore size was reduced by adding 20 nm nAg particles in the casting solution. Most importantly, the introduction of 40 nm nAg particles reduced the growth of bacterial colonies on the membrane surface by up to 72%. These findings revealed that nAg particles are expected to be a potential modifier for the fabrication of an ultrafiltration membrane.

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Section: Resultsmentioning

confidence: 99%

Study Effect of nAg Particle Size on the Properties and Antibacterial Characteristics of Polysulfone Membranes

Prihandana

Sriani²,

Muthi’ah

et al. 2022

Nanomaterials

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“…The indicator of biological contamination was determined by calculating the Most Probable Number (MPN) coliform index (Supardan, 2018) ; (Aulya et al, 2020) ; (Some et al, 2021). The analysis of total coliform and Escherichia coli concentration was carried out using the MPN method according SNI 01-2332.1-2006.…”

Section: Bacteriological Examination Proceduresmentioning

confidence: 99%

“…All wells do not have sewerage or are in poor condition. Water polluted by sewage is not suitable as drinking water and for recreation (Some et al, 2021) . Good waste management is needed to reduce water pollution (Bisimwa et al, 2022) .…”

Section: Water Pollution Riskmentioning

confidence: 99%

Bacteriological quality and environment risk of water pollution of dug wells on Semau Island, Indonesia

Kusmiyati

Waangsir

Mauguru

et al. 2022

ijhs

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Dug wells are a source of clean water used by many people in Indonesia. Poor quality water can have negative effect on public health. This study was to obtain an overview of the bacteriological quality of water and the risk of water pollution of dug wells on Semau Island, Indonesia. The research design was a cross-sectional study. The research location was on Semau Island (8 villages), one dug well was taken for each village as a sample. Observations and laboratory examinations were conducted to determine environment risk factors, total coliform, Escherichia coli and total bacterial. The results showed that the total coliform in 6 samples exceeded standards, E. coli were found in all samples, the total plate number ranged 85-190 CFU/ml. The dug wells environment showed that 50% are at a distance of <10m from the source of pollution, 100% no waste water drainage, 62% there were cracks on the floor, 62% of the well 3 meters deep no plastered, 82% no fence. Some samples had poor bacteriological quality and environment risk factors for contamination, it is necessary to improve the facilities and environmental of the wells and treat water before consumption.

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“…Total coliform bacteria are an indicator of the presence of pathogenic bacteria, which are microorganisms that can be used to assess whether a water source has been polluted with pathogens or not [16], [17]. Organic and inorganic particles, pathogenic organisms, nutrients, and a variety of hazardous components may be found in high concentrations in a municipal wastewater or household sewage [18]. The existence of total coliform bacteria in the water body specifies that the water has been polluted with the fecal substance of warm-blooded animals [19].…”

Section: Introductionmentioning

confidence: 99%

The chitosan cembrane cffectiveness of Anadara granosa clam shells to remove total coliform in greywater

Ananto

Eri²,

Marlik³

et al. 2022

IJPHS

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Clam shell is a solid trash that has a rough texture, difficult to digest, and polluting the environment. Blood clam shells (Anadara granosa) contain chitin, which is converted into antimicrobial chitosan. The purpose of this study was to see the effectiveness of chitosan membrane from blood clam shells in reducing total coliform bacteria in household greywater. This study was carried out using experimental research method design. This research focused on household greywater waste. The chitosan concentrations on the membrane varied between 2.5% and 3.5% with filtration times of 20 and 60 minutes. The Anova Quadratic model test was further used to examine the data. Chitosan was separated from the shell of the blood clam at peak angles of 19.66° and 26.04° according to X-ray diffraction (XRD) characterization. It was obtained that chitosan membrane, with a concentration of 3.5% and a filtering duration of 60 minutes, provided the highest percentage of total coliform bacteria reduction of 99.9%. The conclusion of this study is that blood clam shells used as chitosan membranes can reduce total coliform bacteria in household greywater waste.

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Microbial pollution of water with special reference to coliform bacteria and their nexus with environment

Cited by 118 publications

References 74 publications

Study Effect of nAg Particle Size on the Properties and Antibacterial Characteristics of Polysulfone Membranes

Study Effect of nAg Particle Size on the Properties and Antibacterial Characteristics of Polysulfone Membranes

Bacteriological quality and environment risk of water pollution of dug wells on Semau Island, Indonesia

The chitosan cembrane cffectiveness of Anadara granosa clam shells to remove total coliform in greywater

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