The role of
The role of
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DOI：
10.1007/s004490050388
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发表时间：
2021-01
影响因子：
2.2
通讯作者：
Bangu Bangu-Bangu;Yuhanah Yuhanah-Yuhanah;GraceTedy Tulak;H. Siagian
中科院分区：
文献类型：
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作者：
Bangu Bangu-Bangu;Yuhanah Yuhanah-Yuhanah;GraceTedy Tulak;H. Siagian
环境污染的生物监测正在日益普及，因为人们认为，如果标准化，它可能会被证明是一种长期具有成本效益的替代技术。在水生介质中，为了监测重金属污染物（主要是外源性物质），早期研究人员已经尝试了许多水生植物。这些水生植物已被证明具有不同程度的积累能力，这可以优选地用于清除有毒物质，如铅（II）等。这种合适的清除剂的筛选标准还考虑了大规模收获和处理生物质的容易性。这里来使用的水生植物，和它的潜力，形成金属蛋白络合物（phytochelatin），以阻止扩散的金属，Pb（II），ions.In目前的调查，实验测试系统是常见的热带水生杂草，Salvinia rotundifolia，Willd。它已显示出很高的承诺，从合成以及工业（电池生产单元）废水中去除Pb（II）。在4天的时间内，50克（湿重）的植物能够从1.50升的两种废水中去除约85-95%的Pb（II），其中含有0.65-1.8 ppm的金属，最佳pH值为5.5。在不同的pH值，植物重量，和金属浓度的组合下的吸收潜力进行了研究。在本研究中，采用生物技术将Salvinia Rotundifoliacan的生物量从80 mg干重/g鲜重降低到72.3 mg干重/g鲜重，并对该生物技术在工业废水处理中的应用进行了研究。同时观察到组织电导率从161增加到181.5（以微姆欧/厘米为单位）。这反映了重金属对生物质细胞膜的潜在伤害作用。这些变化，如果标准化，很可能作为一个合适的“生物监测”水生金属污染的装置，在目前的情况下，电池制造单位，印度的污水质量进行了评估。虽然业界已有污水处理厂，但平衡池的污水（排放点）被发现含有高浓度的铅（0.657-1.021 mg/l），BOD（470毫克/升）和COD（680 mg/l），而国家污染控制委员会的标准分别为0.1 mg/l、30 mg/l和250 mg/l。还尝试处理来自上述工业单元的现有污水处理厂（ETP）的平衡池的废水，以将Pb（II）、BOD（5天）和COD的浓度降低到管理委员会规定的允许限度内。处理是在一个实验室规模的氧化池中进行的，该氧化池培养有Salvinia rotundifolia，容量为85升，水力停留期约为10天。
Bio-surveillance of environmental pollution is increasingly gaining ground, as it is felt that if and when standardized, it might prove to be a long term cost-effective alternative technology.In aquatic media, for monitoring heavy metal pollutants, which are mostly xenobiotic, a number of hydrophytes have been tried by earlier researchers. These hydrophytes have shown to have varying degree of accumulation capacities, which could be preferably utilized in scavenging the toxicants such as Pb(II) among others. The screening criteria of such a suitable scavenger also take into account the ease of harvesting and handling the biomass on a large scale. Here comes the use of a macrophyte, and its potentiality of forming metallo-protein complexes (phytochelatin) to hold back the diffused metal, Pb(II), ions.In the present investigation, the experimental test system was the common tropical aquatic weed,Salvinia rotundifolia,Willd. It has shown a high promise for Pb(II) removal from synthetic as well as industrial (battery producing unit) wastewater. Within a span of 4 days, 50 gm (wet weight) of the plant was capable of removing about 85–95% of Pb(II) from 1.50 litres of both kinds of wastewaters containing 0.65–1.8 ppm of the metal at an optimum pH of 5.5. The uptake potentials were examined under various combinations of pH, plant weight, and metal concentration. It is suggested that the high uptake and recovery of Pb(II) bySalvinia Rotundifoliacan be efficiently used as a possible future biotechnological solution for industrial wastewater treatment in a tropical and developing country like India.In the present study, a reduction of biomass weight from 80 to 72.3 (in mg dry wt/g of fresh wt.) was noted, while an increase of tissue conductivity from 161 to 181.5 in micro-mhos/cm was observed. This reflects the potential injurious effect of heavy metals to the cell membrane of the biomass. These changes, when standardized, are likely to serve as a suitable `biomonitoring' device for aquatic metal pollution.In the present case, effluent quality of a battery manufacturing unit, India was evaluated. Even though there is an existing effluent treatment plant (ETP) of the industry, the effluent from the balancing tank (discharge point) was found to contain high concentrations of lead (0.657–1.021 mg/l), BOD (470 mg/l) and COD (680 mg/l) as against State Pollution Control Board's standards of 0.1 mg/l, 30 mg/l, and 250 mg/l respectively.In the present investigation, an attempt has also been made to treat wastewater from the balancing tank of the existing effluent treatment plant (ETP) of the above-stated industrial unit to bring down the concentrations of Pb(II), BOD (5 days), and COD within the permissible limits prescribed by the regulatory board. The treatment was done in a laboratory-scale oxidation pond, cultured withSalvinia rotundifolia, of 85 litres capacity using a hydraulic retention period of about 10 days.