Physicochemical Properties and Metal Ions in Water and Sediment of the Dhaleshwari River

Md.Mazharul Islam, Md Hossan Sohid Shoraoardy Bhuiyan, R. Islam, M. Shoeb, M. I. R. Mamun, M. H. Rahman
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引用次数: 1

Abstract

This study was aimed to measure sediment and water quality parameter such as moisture and ash content, pH, TOC, TSS, BOD, TOC, DO, Electrical Conductivity (EC) and Na, K, Ca and Cr metal ions from Dhaleshwari River close to the Savar Tannery Estate (STE). The moisture and ash content of sediments were 23.45-31.42% and 2.09-5.80%, respectively. The pHs of sediment and water samples were 5.20-6.21 and 7.68-8.03, respectively. The average of Ca-hardness, DO and BOD in water were 885.9±88.8, 1.80±0.10 and 16.70± 1.43 mg/L, respectively. The EC of the sediment and water were 24.60-374.00 μS/cm and 32.80-39.50 mS/cm, respectively. The amount of TOC in sediment and water samples were 1.29-3.25g/100g and 2.28-2.70 mg/kg which are very low indicating the fewer amounts of plant and animal residues and sediment biota. TSS in water was 776-936 mg/L which is higher than the permissible limit (600 mg/kg). The Cr content was determined by AAS which implies that the sediment has significantly higher Cr content (38.78-681.62 mg/kg) compared to water (< 0.005 mg/L). The amount of Na and Ca ions were 26.81-45.00 and 16.04-27.36 mg/L, respectively while K ion was very negligible in water. Dhaka Univ. J. Sci. 69(1): 37-42, 2021 (January)
达利什瓦里河水和沉积物的理化性质和金属离子
本研究旨在测量靠近Savar制革厂(STE)的Dhaleshwari河沉积物和水质参数,如水分和灰分含量、pH、TOC、TSS、BOD、TOC、DO、电导率(EC)和Na、K、Ca和Cr金属离子。沉积物水分和灰分含量分别为23.45 ~ 31.42%和2.09 ~ 5.80%。沉积物和水样的ph值分别为5.20 ~ 6.21和7.68 ~ 8.03。水中ca硬度、DO和BOD平均值分别为885.9±88.8、1.80±0.10和16.70±1.43 mg/L。沉积物和水体的EC值分别为24.60 ~ 374.00 μS/cm和32.80 ~ 39.50 mS/cm。沉积物和水样中TOC含量分别为1.29 ~ 3.25g/100g和2.28 ~ 2.70 mg/kg,很低,表明动植物残留物和沉积物生物群数量较少。水中TSS含量为776 ~ 936 mg/L,高于允许限量(600 mg/kg)。原子吸收分光光度法测定沉积物中Cr含量(38.78 ~ 681.62 mg/kg)明显高于水中(< 0.005 mg/L)。Na离子和Ca离子的含量分别为26.81 ~ 45.00 mg/L和16.04 ~ 27.36 mg/L,而K离子在水中的含量几乎可以忽略不计。达卡大学学报(自然科学版),69(1):37-42,2021 (1)
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