scholarly journals Efficiency of Arsenic and Iron Removal Plants (AIRPs) for Groundwater Treatment in Rural Areas of Southwest Bangladesh

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 354
Author(s):  
Md. Aminur Rahman ◽  
Sazal Kumar ◽  
A. S. M. Fazle Bari ◽  
Abhishek Sharma ◽  
Mohammad Mahmudur Rahman
Keyword(s):  
Drinking Water ◽  
Cancer Risk ◽  
Monsoon Season ◽  
Cancer Risk Assessment ◽  
Future Research ◽  
Treated Water ◽  
Post Monsoon ◽  
Drinking Water Standard ◽  
Guideline Value ◽  
Removal Efficiencies

Arsenic (As) removal plants were installed in As-endemic areas of Bangladesh to remove As from well water. In many cases, these removal plants did not perform satisfactorily. This study evaluated the efficiency of 20 As and iron (Fe) removal plants (AIRPs) during pre- and post-monsoon conditions in rural Bangladesh. Results revealed that As removal efficiencies ranged from 67% to 98% and 74 to 93% during the pre- and post-monsoons periods, respectively. In the post-monsoon season As removal at individual AIRP sites was on average (4.01%) greater than in the pre-monsoon season. However, two removal plants were unable to remove As below 50 µg L−1 (Bangladesh drinking water standard) during pre-monsoon, while 11 samples out of 20 were unable to remove As below the WHO provisional guideline value of 10 µg L−1. During post-monsoon, none of the samples exceeded 50 µg L−1, but eight of them exceeded 10 µg L−1. The Fe removal efficiencies of AIRPs were evident in more than 80% samples. Although As removal efficiency was found to be substantial, a cancer risk assessment indicates that hazard quotient (HQ) and carcinogenic risk (CR) of As in treated water for adults and children are above the threshold limits. Thus, additional reductions of As concentrations in treated water are needed to further reduce the excess cancer risk due to As in drinking water. Since 55% and 40% of the AIRPs were unable to remove As < 10 µg L−1 during pre-monsoon and post-monsoon, further improvement including changes in AIRP design, regular cleaning of sludge, and periodic monitoring of water quality are suggested. Future research is needed to determine whether these modifications improve the performance of AIRPs.

Evaluation of groundwater quality and its suitability for drinking purpose in Rajshahi City, Bangladesh

2011 ◽  
Vol 11 (5) ◽  
pp. 545-559
Author(s):  
S. M. Helal Uddin ◽  
M. G. Mostafa ◽  
A. B. M. H. Haque
Keyword(s):  
Drinking Water ◽  
Groundwater Quality ◽  
Water Samples ◽  
Monsoon Season ◽  
Water Type ◽  
Post Monsoon ◽  
Drinking Water Standard ◽  
Drinking Purposes ◽  
Post Monsoon Season ◽  
Rajshahi City

A study was conducted to evaluate the hydrochemical processes controlling the water quality variations and to determine the water type of groundwater in Rajshahi City, Bangladesh, for drinking purposes. A total of 120 shallow and deep tubewell water samples were collected in pre- and post-monsoon seasons during the year 2008–2009 and analyzed for various physico-chemical parameters. The results of the analyses show that water samples were slightly alkaline to neutral pH. The average concentrations of Pb in all samples for the post-monsoon season were above the WHO's guideline for drinking water. For both seasons, arsenic levels exceeded the drinking water standard in 25% of groundwater samples and lead (Pb) levels exceeded in about 60% samples which contained elevated levels (&gt;0.01 mg/L). The major cationic and anionic orders of dominance were unusual, being Ca2+ &gt; Mg2+ &gt; Na+ &gt; K2 &gt; Fe3+ &gt; Pb2+ &gt; Zn2+ &gt; Cu2+ &gt; As (total) &gt; Cd2+ and HCO3− &gt; Cl−&gt; SO42− &gt; NO3−, respectively. The study reveals that the water type of the groundwater was calcium bicarbonate (Ca-HCO3). Thus overall results suggest that groundwater quality of the study area was not suitable for drinking purposes without treatment especially for Pb and As.

scholarly journals Arsenic contamination in the deep tube wells of Kathmandu Valley, Nepal

2013 ◽  
Vol 1 ◽  
pp. 57-62
Author(s):  
Suman Man Shrestha ◽  
S. P. Wagley ◽  
S. Parajuli ◽  
U. KC ◽  
A. KC
Keyword(s):  
Drinking Water ◽  
Arsenic Concentration ◽  
World Health ◽  
Kathmandu Valley ◽  
Strong Positive Correlation ◽  
Positive Correlation ◽  
Post Monsoon ◽  
Drinking Water Standard ◽  
Tube Wells ◽  
Guideline Value

A study was conducted at 13 different areas of Kathmandu Valley to know the status of arsenic in deep tube wells in post monsoon and winter in 2009 and 2010. The depth of the deep tube wells ranged from 75 m to 304 m. The study was also carried out to know the correlations between depths of the deep tube wells and arsenic concentration. The collected samples were analyzed as per standard method using spectrophotometer. The correlations of arsenic concentration in different season (post monsoon and winter) were also studied. 92.31% of deep tube wells in post monsoon and winter exceeded permissible values of World Health Organization guideline value 0.01 mg/L for drinking water but 38.46% deep tube wells in post monsoon and 46.15% of deep tube wells in winter exceeded permissible values of Nepal Drinking Water Standard of 0.05 mg/L. There was strong positive correlation in arsenic concentration between post monsoon and winter(r=0.94, p<0.001). There was weak but positive correlation between arsenic concentration and depth of deep tube wells in winter ( r=0.23, p=0.451). There was very weak correlations between arsenic concentration and depth of deep tube wells in post monsoon (r=0.055, p=0.859). The trend distribution maps were generated for arsenic in post monsoon and winter.

Tobacco use among individuals presenting for cancer risk assessment

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. 1547-1547
Author(s):  
W. Shen ◽  
L. F. Ross ◽  
L. Patrick-Miller ◽  
O. I. Olopade ◽  
S. A. Cummings ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Cancer Risk ◽  
Tobacco Use ◽  
Tobacco Cessation ◽  
Cancer Risk Assessment ◽  
Screening Colonoscopy ◽  
Future Research ◽  
Racial Groups ◽  
Clinical Encounters ◽  
History Of

1547 Background: An important component of cancer risk assessment (CRA) is the evaluation of exposures and preventive health behaviors. Tobacco use (TU) remains a significant contributor to cancer risk and decreasing tobacco use is a major national health objective. Methods: Clinical charts were reviewed to evaluate the incidence of TU and characteristics of tobacco users (TUs) among individuals presenting to the University of Chicago Cancer Risk Clinic for cancer risk assessment (CRA). Results: Among 98 individuals (97% female) presenting for CRA from 12/05–10/06, 51% (50/98) reported no TU, 38% (37/98) reported prior TU and 11% (11/98) reported current TU. Current tobacco users included 10% (7/73) of whites and 18% (4/22) of blacks with no TU among other racial groups (0/3). 45% of TUs (5/11) had a personal history of cancer. 45% of TUs reported compliance with self-breast examination, 73% with cervical cancer screening. Among TUs over 40 years old (YO), 67% (6/9) reported a mammogram in the last year and the 2 TUs over 50 YO reported a screening colonoscopy. All TUs reported interest in tobacco cessation interventions. Conclusions: Tobacco use among individuals presenting for CRA is lower than reported general population rates of TU (23%). Despite this, a proportion of individuals presenting for CRA report current TU, despite engaging in other cancer prevention behaviors. Continued review of clinical encounters from 2004- 06 (n=425) will allow for multi-variate analysis of predictors of current TU, which will inform future research employing cancer risk assessment encounters as “teachable moments” to optimize tobacco cessation outcomes. No significant financial relationships to disclose.

Trihalomethanes in drinking water and cancer: risk assessment and integrated evaluation of available data, in animals and humans

1995 ◽  
Vol 171 (1-3) ◽  
pp. 61-68 ◽  
Author(s):  
L. Attias ◽  
A. Contu ◽  
A. Loizzo ◽  
M. Massiglia ◽  
P. Valente ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Cancer Risk ◽  
Cancer Risk Assessment

scholarly journals Reduction of trihalomethane formation and detoxification of microcystins in tap water by ozonation

2008 ◽  
Vol 6 (2) ◽  
pp. 281-288 ◽  
Author(s):  
Orapin Thapsingkaew ◽  
Vilailuck Kijjanapanich ◽  
Werawan Ruangyuttikarn
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Tap Water ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Residual Chlorine ◽  
Treated Water ◽  
Guideline Value ◽  
Phosphatase 2A ◽  
The Mean

The efficiency of ozonation in comparison to chlorination for removal of microcystins and production of trihalomethanes (THMs) in water was investigated. One hundred and ninety water samples of ozone and chlorine treated water were collected at a water treatment plant between August 2004 and March 2005. The level of THMs, total organic carbon and residual chlorine were determined. Protein phosphatase 2A inhibition assay was used to detect microcystins and the presence of microcystins was confirmed by HPLC. The results show that 91.5% of the THM species in treated water was chloroform and 8.5% was bromodichloromethane. The mean THM level± standard error of mean in chlorinated water (CW) (45.1±3.0 μg/L) was higher than the mean of THM level in ozonated water (OW) (18.6±2.2 μg/L). In addition, no OW sample exceeded the first stage U.S. EPA maximum THM contaminant level for drinking water (80 μg/L) and only 8% of these samples exceeded the second stage level (40 μg/L). On the other hand, 3% of CW samples exceeded 80 μg/L and 68% exceeded the 40 μg/L level. The microcystin level in all water samples was below the WHO guideline value (1 μg/L) for drinking water.

scholarly journals Cancer risk assessment and modeling of groundwater contamination near industrial estate, Lahore, Pakistan

2021 ◽  
Vol 11 (2) ◽  
pp. 314-326
Author(s):  
Muhammad Irfan Jalees ◽  
Muhammad Umar Farooq ◽  
Asma Tufail Shah
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Drinking Water ◽  
Cancer Risk ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Pearson Correlation ◽  
Oxygen Demand ◽  
Cancer Risk Assessment ◽  
Industrial Estate

Abstract More than 60% of the population of Pakistan has no access to safe drinking water. Industrial zones near populated areas make conditions more severe due to continuous contamination. The aim of this study was to use statistical tools for correlation and source identification and health risk assessment of contamination due to Sundar Industrial Estate (SIE), Lahore, Pakistan. Drinking and wastewater samples were collected from SIE and analyzed for physical, chemical, microbial, and heavy metals analysis. Results showed that heavy metals and microbial contamination were beyond the National Drinking Water Quality Standards of Pakistan while high values of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) wastewater were responsible for contamination of drinking water through seepage. There was a medium to strong correlation among parameters of all samples as indicated by Pearson correlation and analysis of variance. Principal component analysis and cluster analysis indicated sources of contamination, i.e., refuse leachate and untreated effluent discharges as main source of pollutants for drinking water. Health risk assessment showed a high intake of heavy metals through drinking water. Hazard quotient and hazard index indicated high probability of non-carcinogenic risk while cancer risk assessment suggested that out of every 100 of the population 93 people may suffer carcinogenic effects.

Gut Content Analysis of Labeo Calbasu at Different Seasons in Dekhar Haor, Sunamgonj, Bangladesh

2021 ◽  
Vol 5 (2) ◽  
pp. 297-308
Author(s):  
F J Munny ◽  
M S Uddin ◽  
M S Islam ◽  
M T Alam ◽  
I N Suravi ◽  
...  
Keyword(s):  
Monsoon Season ◽  
Gut Contents ◽  
Future Research ◽  
Gut Content ◽  
Dominant Group ◽  
Feeding Intensity ◽  
Post Monsoon ◽  
Post Monsoon Season ◽  
Different Seasons ◽  
Management And Conservation

This research was conducted to find out the seasonal (monsoon and post monsoon) variation in gut contents of Labeo calbasu from June to November, 2016 in Dekhar haor of Sunamgonj district, Bangladesh. Three orders of phytoplankton were identified from the gut content viz. Bacillariophyceae (11 genera), Chlorophyceae (9 genera), and Cyanophyceae (4 genera). Bacillariophyceae (6.98±1.61×103cell/L) were identified as the most dominant phytoplankton group. Two types of zooplankton viz. crustacean (5 genera) and rotifer (5 genera) were identified. Crustaceans (0.88±0.4×103cell/L) were identified as the dominant group among zooplankton. Feeding intensity (average index of fullness, Gastrosomatic index) was higher in the post monsoon season compared with the monsoon season. The findings concluded that L. calbasu prefers phytoplankton over zooplankton, and the plankton consumption was slightly higher in the post-monsoon season than in the monsoon season. This research is expected to be crucial in the management and conservation of endangered L. calbasu in open waters, as well as provide baseline work for future research and open the path for captive aquaculture.

Comparative cancer risk assessment of THMs in drinking water from well water sources and surface water sources

2010 ◽  
Vol 179 (1-4) ◽  
pp. 499-507 ◽  
Author(s):  
Ali Reza Pardakhti ◽  
Gholam Reza Nabi Bidhendi ◽  
Ali Torabian ◽  
Abdolreza Karbassi ◽  
Masood Yunesian
Keyword(s):  
Risk Assessment ◽  
Drinking Water ◽  
Surface Water ◽  
Cancer Risk ◽  
Water Sources ◽  
Cancer Risk Assessment ◽  
Well Water
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