scholarly journals Groundwater Quality and Risk Assessment of Heavy Metal Pollution in Middle-West Part of Bangladesh

2021 ◽  
pp. 1-9
Author(s):  
MG Mostafa ◽  
Keyword(s):  
Heavy Metal ◽  
Groundwater Quality ◽  
Water Samples ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Pollution Index ◽  
Compound Pollution ◽  
Study Results ◽  
West Part ◽  
Middle West

Bangladesh is a densely populated and developing country that faced severe water contamination, crisis, and security. About 100% of the population has access to the availability of freshwater, but the purity of water is always concerned. The groundwater of Bangladesh is under increasing threat from overexploitation, population growth, rapid urbanization, and pollution from industries, domestic and agricultural sources. For the assessment of heavy and toxic metal contamination in shallow groundwater, the study collected 40 water samples from different stations in the middle-west part of Bangladesh. The results showed that three metals ion, viz. iron, manganese, and lead exceeded the concentration limit of WHO (2011) in most of the water samples indicating severe human health hazard. The single-factor pollution index (I i ) and compound pollution index (CPI) value of these three (3) metals were very high, i.e., much greater than 1. The other metal concentrations were found within the safe permissible ranges. The values of heavy metal pollution indices, viz. heavy metal pollution index (HMPI), heavy metal evaluation index (HMEI), degree of contamination (Cd ), Nemerow Index (NeI), and ecological risk measurement (ERI) showed that most of the water samples were found medium to high levels of contamination in the study area. The analysis results revealed that an average of 32.6%, 15.6%, and 51.8% of the water samples was found low, medium, and high risk from heavy metal, respectively. There were 20 samples found highly contaminated with heavy metals out of 40 samples. The study results revealed that both the geogenic and anthropologic activities influenced the groundwater system of the area. It suggested that the groundwater quality should go under a continuous monitoring process for sustainable water quality management in the area. The study findings could help with further planning of potential future remediation measures for policymakers.

scholarly journals Distribution, source, water quality and health risk assessment of dissolved heavy metals in major rivers in Wuhan, China

PeerJ ◽  
2021 ◽  
Vol 9 ◽  
pp. e11853
Author(s):  
Xingyong Zhang ◽  
Qixin Wu ◽  
Shilin Gao ◽  
Zhuhong Wang ◽  
Shouyang He
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Heavy Metal ◽  
Health Risk ◽  
Health Risk Assessment ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Pollution Index ◽  
Carcinogenic Risk ◽  
Source Water Quality

Heavy metals are released into the water system through various natural processes and anthropogenic activities, thus indirectly or directly endangering human health. The distribution, source, water quality and health risk assessment of dissolved heavy metals (V, Mn, Fe, Co, Ni, Zn, As, Mo, Sb) in major rivers in Wuhan were analyzed by correlation analysis (CA), principal component analysis (PCA), heavy metal pollution index (HPI), hazard index (HI) and carcinogenic risk (CR). The results showed that the spatial variability of heavy metal contents was pronounced. PCA and CA results indicated that natural sources controlled Mn, Fe, Co, Ni and Mo, and industrial emissions were the dominant factor for V, Zn and Sb, while As was mainly from the mixed input of urban and agricultural activities. According to the heavy metal pollution index (HPI, ranging from 23.74 to 184.0) analysis, it should be noted that As and Sb contribute most of the HPI values. The health risk assessment using HI and CR showed that V and Sb might have a potential non-carcinogenic risk and As might have a potential carcinogenic risk to adults and children in the study area (CR value exceeded target risk 10−4). At the same time, it was worth noting that As might have a potential non-carcinogenic risk for children around QLR (HI value exceeded the threshold value 1). The secular variation of As and Sb should be monitor in high-risk areas. The results of this study can provide important data for improving water resources management efficiency and heavy metal pollution prevention in Wuhan.

An Sample Analysis of Heavy Metal Pollution to Urban Surface Soil Based on Transfer Function Theory

2013 ◽  
Vol 446-447 ◽  
pp. 1516-1522
Author(s):  
Yang Shu ◽  
Hu Shu
Keyword(s):  
Heavy Metal ◽  
Transfer Function ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Surface Soil ◽  
Function Theory ◽  
Pollution Index ◽  
Pollution Source ◽  
Spreading Process ◽  
Nemerow Integrated Pollution Index

The degree of heavy-metal pollution of different district in city area is discussed by improved Nemerow model and further topographic maps are drawn .From the improved Nemerow model, the Nemerow integrated pollution index is determined . The main reason of pollution is found according to weight, then the corresponding heavy-metal pollution things portion in the overall district is computed by using the model . The element that corresponds the maximum weight is found .And it proves that the heavy-metal pollution element Hg is the main pollution reason .The pollution source is determined by heavy metal spreading features using transfer function theory. Thinking of the main pollution elements as the researched object ,the spreading features are analized using transfer function characteristics. And the spreading process is described using flow chart.

scholarly journals Analysis of the Impact of Rural Households’ Behaviors on Heavy Metal Pollution of Arable Soil: Taking Lankao County as an Example

2018 ◽  
Vol 10 (12) ◽  
pp. 4368 ◽  
Author(s):  
Shixin Ren ◽  
Erling Li ◽  
Qingqing Deng ◽  
Haishan He ◽  
Sijie Li
Keyword(s):  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Metal Content ◽  
Rural Households ◽  
Pollution Index ◽  
Arable Soil ◽  
Heavy Metal Content ◽  
Pollution Level ◽  
Single Factor

As heavy metal pollution of arable soil is a significant issue concerning the quality of agricultural products and human health, the rural households’ behaviors have a direct impact on heavy metal content in arable soil and its pollution level, but only a few researches have been done at such microscopic scale. Based on 101 field questionnaires of rural households in Lankao County and the monitoring data on heavy metal of arable soil of each rural household, the kind of rural households’ behaviors which impose obvious influence on heavy metal content of arable soil are investigated via single-factor pollution index, Nemerow pollution index and econometric model in this study. The results show that, rural households’ land utilization mode affects heavy metal content in soil, e.g., the degree of heavy metal pollution of soil for intensive planting is higher than that of traditional planting, viz. vegetable greenhouse > garlic land > traditional crop farmland. The management of cultivated land with due scale is beneficial to reducing heavy metal content in soil, that is, the land fragmentation degree is in direct proportion to heavy metal content in soil, so rural households are encouraged to carry out land circulation and combine the patch into a large one. Excess application of fertilizer, pesticide and organic fertilizer will lead to heavy metal pollution of soil, while agricultural technical training organized by government department and the foundation of agricultural cooperative can promote the technical level and degree of organization of rural households and enable them to be more scientific and rational in agrochemicals selection and application, hence reducing or avoiding heavy metal pollution of soil. Single factor pollution level of heavy metal in the soil for planting various crops is different, so it is recommended to prepare various pollution reduction programs for different land types and pollution levels for the harmony and unity of human-nature system.

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