Current Research Paper Heavy metals content in inlet water, treated and untreated waste wa-ter of garments industries at Gazipur, Bangladesh Environmental Science Environmental Science (original) (raw)
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An investigation was made to ascertain heavy metals concentration in effluent samples collected from different textile and garments industries located at Bhaluka industrial area, Mymensingh, Bangladesh during August to November, 2013. Atomic absorption spectrometer (AAS) was used to evaluate the concentration of Zinc (Zn), Copper (Cu), Nickel (Ni), Cadmium (Cd), Chromium (Cr) and Lead (Pb) in the samples. The study revealed that heavy metals were present in variable amounts, where the concentrations of Cu (0.0405 ppm) and Pb (0.0003 ppm) were found lower than recommended level for industrial waste water. Among the present trace metals, the highest concentration (0.2-1.0 ppm) was found in Zn. Although the concentration is suitable for irrigation, it is unsafe for aquaculture. Besides, all of the wastewater samples possessed no Cr, Cd and Ni, which comprised less of the minimum acceptance level, indicating no possibility of contamination. However, comparing findings of this study with the safe limits for industrial wastewater, it can be concluded that the waste water of the study area except some sampling sites can be used for irrigation and aquaculture.
The concentrations of heavy metals were determined in tannery and textile effluents and water of adjacent rivers (Buriganga and Karnatoli, Dhaka) from September 2006 to August 2007 at three different locations. Concentrations of Zn, As, Cd, Pb, Ni, Cr and Cu of tannery effluents seasonally varied from 7.65-14.82, 0.45-1.07, 0.25-1.91, 2.89-4.03, 4.02-9.5, 1256-2173.13 Pg/L and BDL respectively. In textile effluents Zn, As, Cd, Pb, Ni, Cr and Cu concentrations were seasonally varied from 14.26-39.86, 4.5-6.6, 0.23-0.65, 0.96-3.89, 3.5-6.83, 1.16-3.85 and 11.6-39.23 Pg/L respectively. The variation in concentration of heavy metals was due to the use of different raw materials and variation of production level. The concentrations of Zn, As, Cd, Pb, Ni, Cr and Cu of Buriganga River water seasonally and spatially varied from 5.2-62.07, 1.76-3.53, 0.11-2.37, 1.18-8.59, 1.15-6.44, 9.45-293.08 Pg/L and BDL respectively whereas in Karnatoli River the concentrations of Zn, As, Cd, Pb, Ni, Cr and Cu were seasonally and spatially varied from 0.62-68.47, 0.56-1.91,0.13-1.53, 0.53-6.8, 4.2-8.2, 2.75-7.0 and 8.6-48.14Pg/L respectively. Lowest concentrations of heavy metals were observed during rainy season which might be due to the dilution effect of rainfall whereas the highest concentration of these metals were found during dry season as industrial effluents are less diluted due to recede water in the river in this season. Some of the heavy metals concentrations are higher than the recommended value, which suggest that the Buriganga and Karnatoli River are to a certain extent heavy metal polluted river.
Pollution is an important problem in human and aquatic life that leads to a miserable condition. There are many kinds of pollution but textile industry is mainly by the release of wastewater containing dyes and chemicals, coming out from wet processing like de-sizing, scouring, bleaching, mercerizing, dyeing, printing and finishing. In present investigation, the physico-chemical analysis and heavy metals concentration are pH, TDS, TSS, BOD5, COD, Total alkalinity, sodium, sulfate, phosphate, chloride, chromium, cadmium, copper, iron, nickel, lead and zinc were found within the permissible limits. Concentrations of all these metal ions in the effluent were above the recommended NEQS. The effluent samples were evaluated to ascertain the efficiency of industries wastewater treatment process. Conventional methods were employed for determination of physico-chemical parameters while; heavy metals in the textile effluent sample were analyzed using an Atomic Absorption Spectrophotometer (AAS).
Madridge Journal of Agriculture and Environmental Sciences, 2018
Environmental problems of the textiles industries are mainly cause by the discharge of wastewater coming from the dyeing and finishing processes containing the heavy metals. This study assessed the heavy metals concentrations in the surface water body of neighboring Funtua and Zaria textile industry and effluent water collected from Funtua textile industry using atomic absorption spectrometer (AAS). The concentrations of heavy metals like Lead (Pb), Cadmium (Cd), Iron (Fe), Zinc (Zn) and Coppernicium (Cn) were assessed and the concentrations of each of the metals varies in the samples collected and analyzed with the following values: Funtua water samples Fe 0.0025 mg/l lower part and 1.63 mg/l upper part, Zn 0.51 mg/l lower part and 1.02 mg/l upper part, Pb 0.007 mg/l lower part and 0.61 mg/l upper part, Cd 0.01 mg/l lower part and 0.016 upper part, Cn was not detected (ND), for effluent Fe 3.61 mg/l and 2.61 mg/l, Pb 2.66 mg/l and 2.69 mg, Cd 0.99 mg/l and 1.06 mg/l, Zn 2.26 mg/l and 2.99 mg/l, Cn ND also and for Zaria water samples Fe 0.96 mg/l lower part and 2.15 mg/l upper part, Zn 1.07 mg/l lower part and 1,74 mg/l upper part, Pb 0.36 mg/l lower part and 1.02 mg/l upper part, Cd 0.41 mg/l lower part and 0.66 mg/l upper part and Cn ND also. Fe and Pb showed concentrations higher than limits set by the NSDWQ and WHO while Zn and Cd showed concentrations below limits set by NSDWQ and WHO. The river neighboring Zaria textile happened to be more polluted than the one neighboring Funtua textile industry. It was concluded that the effluent samples of textile industries discharge causes pollution to the water bodies and serious problem for living being and ecological environment. Therefore, the effluent water to be discharged by these industries must be adequately treated before discharge.
The present study was conducted to assess the contamination of heavy metals in the industrial waste waters collected from Dhaka city, Bangladesh. Three different types of industries (tannery, dye chemical and textiles) have been considered as the major sources of untreated effluents. Metals were analyzed using inductively coupled plasma mass spectrometer (ICP-MS) and compared with different international standard values. The ranges of Cr, Ni, Cu, As, Cd and Pb
Monitoring of Heavy Metal in Textile Waste Water of Sanganer, Jaipur (Rajasthan)
The textile industry represents a range of industries with operations and processes as diverse as its products. Textile industry effluents account for several point sources of water pollution thus posing negative effects on aquatic lives and human health. The paper contains results of a study carried out in agricultural fields of Sanganer town. This paper contains results of physico-chemical analysis of waste water collected from Sanganer town. The town is situated about 20 kms away from the city center, Jaipur.
Dispersion of heavy metals in textile effluent and pond environment in Panipat industrial area
Environment Conservation Journal
The Panipat region is well known textile industrial zone of Northern India and have a large number of dye houses and textile processes units. The dyeing house industries uses a large volume of water for wet dip coloring process and draine most of the waste water as effluent. The effluent containing composite mixture of different pollutant in terms of heavy metals. Metal accumulation in sediments provides a record of the spatial and temporal history of pollution from surface water to ground water. The dispersion of heavy metals from textile effluents to adjoining pond system ultimately affect quality of water. The present study revealed that pond sediment found highly polluted regarding heavy metals load. Transfer factor for Fe, Mn, Ni and Pb was found very high in pond through open effluent drainage system.
Polymer Journal, 2016
The present study has been undertaken in a laboratory scale to characterize and investigate pollution potential of textile effluents from DEPZ area in Dhaka, Bangladesh. Collected effluent samples from five different industries were analyzed for physico-chemical parameters using field kits and Standard Methods, and for metals using Flame Atomic Absorption Spectrophotometer (FAAS). The average physico-chemical parameters such as temperature, color, pH, DO, EC, BOD, COD, TS, total alkalinity and total hardness were found 52.4 oC, 2646 PCU, 9.788, 1.492 mg/L, 7473.2 μS/cm, 157 mg/L, 508.8 mg/L, 9140.8 mg/L, 761.2 mg/L and 189.6 mg/L, respectively. The average concentrations of metal found in the textile effluents were in the order of Na (4611.762 mg/L) > Ca (9.166 mg/L) > Mg (3.578 mg/L) > Zn (0.113 mg/L) > Ni (0.0074 mg/L) > Cu (0.0032 mg/L). All the measured physico-chemical parameter values are negatively deviated but metal concentrations (except Na) are positively de...