Department of Biotechnology, Sri Venkateswara College of Engineering , Sriperumbudur, India.
Paryavaran Bhavan, Gujarat Pollution Control Board , Gandhinagar, India.
Bioengineered. 2020 Dec;11(1):708-717. doi: 10.1080/21655979.2020.1780828.
The idea of eliminating noxious metal ions from electronic waste contaminated water has led to the use of the metal adsorbing ability of biological matter. The principle of an ion exchanger of biological origin is the key in exhibiting this metal binding feature of microbial biomass. In this study, dead biomass of was immobilized using sodium alginate and tested as a biosorbent for hexavalent chromium elimination from effluent. Size and functional groups were characterized for the immobilized bead containing biomass. Optimization of boundary variables like bead size, biosorbent dosage, contact time, pH, and temperature were performed. Maximum elimination of 92.43% hexavalent chromium was achieved at pH 2.0 for 12 h at 37°C, with 20 g/25 mL adsorbent dosage. On application of adsorption isotherms, the data were found to fit Freundlich isotherm and exhibited a high value of correlation coefficient proving the ability of biomass to act as an effective quencher of hexavalent chromium from electronic waste contaminated water.
从电子废物污染水中消除有毒金属离子的想法导致了生物物质的金属吸附能力的应用。生物起源的离子交换剂的原理是表现微生物生物质这种金属结合特性的关键。在这项研究中，使用海藻酸钠固定 的死生物质，并将其作为生物吸附剂测试，以去除废水中的六价铬。对含有生物质的固定珠的大小和官能团进行了表征。优化了边界变量，如珠大小、生物吸附剂剂量、接触时间、pH 值和温度。在 pH 值为 2.0、37°C 下反应 12 小时的条件下，以 20 g/25 mL 的吸附剂剂量，可实现 92.43%的六价铬最大去除率。应用吸附等温线时，发现数据符合 Freundlich 等温线，并且相关系数值很高，证明 生物质有能力有效地从电子废物污染水中去除六价铬。
