Pollution

Modern wastewater treatment technique is effective in removing inherent contaminants in influent, which leaves the effluent with permissible minimum regulatory standards that would support the demand for water economy, recycling and re-use. Most industrial wastewater (untreated) entering a water body represents a heavy source of environmental pollution. It affects the water quality as well as microbial flora and aquatic lives. With competing demands on limited water resources, awareness of issues involved in water pollution, has led to considerable evaluations concerning environmental effects of industrial effluents discharged into aquatic environments. Effluents rich in decomposable organic matter constitute high level of organic pollution that promotes growth of significantly high coliforms and other microbial forms leading to eutrophication. Finally, this could pose serious health issues to users especially when discharge into water bodies, but could be remedied in the recent times with the advent of modern wastewater treatment techniques.

This study applies multivariate statistical technique to understand the hydro-geochemistry characteristics of pollutants along River Kaduna. Fourteen key monitored parameters that accurately represent the water quality during the rainy season (May-August) were provided by the Kaduna State Water Board. Cluster analysis (CA) grouped the sampled parameters into three independent classes (turbidity (TUR), conductivity (COND) and twelve parameters). As such, correlation of COND and TUR is worked out with the rest of the analyzed parameters based on the result generated in the CA. The findings indicate an excess concentration of TUR and COND with no significant relationship with other observed parameters. This finding is an indication that water quality parameters poses hidden complex characteristics that can only be simplified and understood when subjected to multivariate statistics and effort should be put by stakeholders to checkmate the concentration of the dominant pollutants.

Copper is one of the heavy metal which is essential but shows some toxic effects in high concentration. It has been found high copper uptakes lead to kidney, brain damage and death also. This study investigated copper degradation by a group of copper-resistant bacteria isolated from sea-water. Copper resistant bacteria, Bacillus pumilus Strain PD3 was isolated, which showed maximum copper-resistance at 150 mg l-1 Cu (II).Using the isolated bacteria bioremediation experiments were performed, varying the copper concentration from 10-100 mg l-1 and solution’s pH 3-6 at different time intervals. 45-54% copper degradation was obtained at pH 6, 50 mg l-1 and 47 hours. The result indicated that these isolated bacteria have a good potential in Copper degradation from aqueous solution.

One of the pressures of human population on the planet is the rapid and unbridled growth of cities. In the cities, the concepts of sustainability and sustainable urban development are on the basis of ecological, economic and socio-political, cultural, and spatial dimensions and contrast of these dimensions. In recent decades, many indicators have been developed to investigate the stability of the cities and one of the best indicators in this field, is the ecological footprint. The purpose of this study is to evaluate sustainable transportation of Tehran applying ecological footprint model and Compare the ecological footprint of urban subway and road transport system. The results of the study showed that the ecological footprint of Tehran transportation is equal to 3348734.16 global hectares while Tehran's biological capacity to absorb the carbon released in the transport sector is equal to 9664.2(gha). Also, the carbon footprint of metro transit system is equal to 12,428 global hectares and the carbon footprint of road system transportation is equal to 3,323,152 global hectares and the produced carbon in road transport system, per kilometer, is 85 times larger than the produced carbon in the Metro system. The ecological footprint of Tehran transportation points to the deterioration of the current situation and it is clear that the policies of transport development are unsustainable and the current transport patterns will make Tehran uninhabitable in the near future. In such conditions, for the development of sustainable transport system based on environmental criteria, a low-carbon transport, transit-oriented development (TOD), and the creation of Green corridor could be some tools for sustainable development in the transportation sector of Tehran.

Mycelial biomass of the selected macro fungi namely Pleurotus florida and Calocybe indica were tested for the dye decolorisation using spectrophotmetry over a period of seven days. Among the two mushrooms selected, Pleurotus florida recorded maximum decolourisation potential with carbon source. The decolorisation efficiency of Pleurotus florida was observed to be 29.70%,50.39% and 64.15% in treatments with 1%,2%,3% carbon source, while Calocybe indica recorded decolourisation of 27.52%,35.44% and 41.38% in 1%,2%,3% carbon source.The study revealed that the macro fungi give scope for decolorisation of dye effluent.

The indoor air pollution especially in rural communities of Bundelkhand region in central India is suffered from indoor kitchen air-born diseases due to large scale using principal biomass fuels such as wood (W), crop residues (C.R.), cow dung cakes (D.C.) and also fossil fuels of low grade coal. All these fuels are producing as a smoke emission in various forms with hazardous composition contain harmful pollutants which adversely affect on human health. The indoor particulate and gaseous pollutants in mean level range from TSPM; 383.2-468.5 µg/m3 , SOx, 12.7-25.4 µg/m3 NOx; 34.1-44.5 µg/m3 and other certain toxic elements emission as trace amounts associated with health problems depends upon the magnitude and types of biomass combustion from the open chulas in kitchens with close non ventilated environments. A number of health risk related problems are created such as chronic obstructive pulmonary disease (COPD), silica-born tuberculosis(TB), asthma, pneumoconiosis, pharynx and laryns ( forms of neoplasm), eye-disorders, depress cellular and humorial immunities etc; mainly based on survey ,HVS monitoring with some pathological data from the investigated areas. This paper is emphasized and attempt should be needed to adopt integrated approaches in domestic pollution free energy use involving fuel diversity resulted keeping in views relating to up-grading socio-economic and reduce health risk aspects with new techniques adaptation where feasible and highly effective in below poverty limit (BPL) of the rural communities for the maintaining conceptual sustainable development supporting the solution of the energy problems in Bundelkhand region.

Industrialization is essential to meet up upcoming demands of the evolution. All the industrial activity releases some amount of by-products as pollution into the environment. Iron and steel industry is one of a major heavy industries of Chhattisgarh and considered as resource intensive and pollution prone and added pollution to air, water resources, precious land. In central India many of the integrated iron and steel industry is highly polluting, non-compliant and resource-inefficient. The aim of the present review is to understand and aware with the pollution, mainly (i) stack emission as air pollution, and (ii) heavy metal leaching from piling slag, by steel plants in Chhattisgarh, central India region.

One of the major problems in using subsurface drain is pipe and envelope clogging by mineral materials. Such a process is the result of disturbances of soil structure during drain installation. Drain filter selection follows definite rules and neglecting them can result in project failure. Current study is based on evaluation of three kinds of synthetic filters in comparison with mineral filters. Two soil samples of northern Khorram Shahr (1.65m deep) were obtained for the study. Physical and chemical analysis on samples showed they do not have major differences in texture and particle size distribution (PSD). Original recommendations based on previous studies on synthetic filters in terms of PSD curve and soil texture was to use PP700 type. Two other types were also chosen as the upper and lower boundaries of the main choice. The performance of three types of filters (PP450, PP700 and PP900) was assessed in terms of clogging potential using ASTM-5101standard test. In addition, mineral blanket was designed according to the USBR criteria. Experiment was conducted in three treatments and completely on random. The test was conducted in laboratory, using physical model for infiltration (according to the ASTM D-5101 standard) and by creating four different hydraulic pressure head (25, 50, 75 and 100cm). In the study, changes in outflow from soil-geotextile system, hydraulic conductivity, gradient ratio and hydraulic conductivity ratio were analyzed for four filters. The results showed that 1) in terms of the gradient ratio, none of the filters were found sensitive to clogging, 2) outflow from mineral filter was 2 to 3 times greater than for geotextiles, 3) the hydraulic conductivity ratio of mineral filter for PP450, PP700 and PP900 geotextile filters were 3.47, 4.17 and 5.57 respectively, and 4) comparing outflow and hydraulic conductivity variations, geotextile filter of PP450 type was found the best. According to the optimization results, for PP450, optimum values for decision variables at different hydraulic heads (H) and drain outflows (Q) were equal to 47 cm and 0.166 cm3/s and for PP700 were 114 cm and 0.183 cm3/s. These values were equal to 94 cm and 0.198 cm3/s for model PP900 and 237 cm and 0.298 cm3/s for gravel filter, respectively.

The aim of this paper is to forecast the quantity of potential annual e-waste generation in Bangalore city for the period 2019-2020 based on obsolescence rate method. E-waste comprises of many items but the present study is limited to seven products Personal computer, Printer, Television, Mobile phone, Refrigerator, Air conditioner and Washing machine for quantification and composition of e-waste produced. The average weight of EEE and obsolescence rate of each product was taken as per E-Waste Volume I, Inventory Assessment Manual, and UNEP. The field data were collected through questionnaire-based survey followed up with interviews where the target respondent groups and e-waste categories were predetermined to determine the e-waste flow purchasing pattern, recycling and disposal practices, and to understand the existing measures for e-waste management in Bangalore. There are three main target respondents included in the survey. The three main categories are Households, Offices (business entities and institutions) and Recyclers (Including importers and exporters, manufacturers, collectors, second-hand shops, repair shops, dismantlers, and processors of recyclable materials from used WEEE). It can be observed that the total quantity e-waste generation in each year is increasing on logarithmic scale. However, the composition of e-waste in each year is varying according to the activities in household, office and recyclers sectors. The generation of E-waste among household sector depends on the lifestyle and socio- economic status. With the increase in income there is an increase in the generation rate, but the generation rate if we observe there is a decrease in e-waste quantity due to inflation rate in the products. In business sector, the projection shows that due to advancement in technology, obsolescence rate and increasing urbanization there will be inevitable trend among increase in generation of waste in the commercial sector.

Water is one of most important gift nature has given to humanity. The importance of this gift of nature is such that without it man could hardly exist. However, the major source of water is groundwater which is mostly polluted by bacteria due to activities around the wells. The aim of the study is to access the level of pollution in shallow wells in Ogbomoso by bacteria. Groundwater samples were collected from ten (10) wells at different locations in Ogbomoso, Oyo State, Nigeria. The samples were taken to the laboratory for Physical and Microbial analysis. The parameters determined include pH, temperature, odour, Total Viable Count (TVC), Total Yeast Count (TYC), Total Mould Count (TMC) and isolation of organisms. Physical parameters in the samples indicated groundwater pollution were below the WHO limits for consumption and USEPA maximum contaminant level. The pH ranged from 5.46-6.65 indicating toxic pollution. In the same vein, odour, temperature and depth range from mild, 23.4-26.0 celsius and 6.3-24.5fts respectively. Organisms identified during isolation include salmonella spp, shigella spp and e.coli. TVC, TYC and TFC ranges between 9.6-57.3(cfu/ml), 4.1-30.0(cfu/ml) and 0-31.2(cfu/ml) respectively. It is concluded that the samples were polluted due to activities around the water source such as improper waste disposal and care for the water source in the environment. The microbial constituents of the entire samples are high and require treatment before domestic use. Borehole provisions, groundwater monitoring and effective nutrient management in the study area were recommended.