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首页> 外文期刊>Clean technologies and environmental policy >The half saturation removal approach and mechanism of Lead (II) removal using eco-friendly industrial fish bone meal waste biosorbent
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The half saturation removal approach and mechanism of Lead (II) removal using eco-friendly industrial fish bone meal waste biosorbent

机译：环保型工业鱼骨粉废弃物生物吸附剂的半饱和去除方法及铅（II）去除机理

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摘要

Lead (II)-laden wastewater from lead acid battery and printed wire board industries are hazardous to human health and environment due to their toxicity and persistent characteristics. This study focuses on eco-friendly industrial Lutjanus erythropterus fish bone meal waste as biosorbent for Lead (II) removal. In this study, the effects of optimization of biosorption, isotherm, kinetic, thermodynamic, characterization of biosorbent were investigated, and the characteristics of biosorbent were compared with those of commercial resins. The half saturation removal of biosorbent amount was determined at 0.09 g in order to represent the excessive metal in real industrial wastewater condition compared to biosorbent and to minimize the consumption of chemicals and biosorption operation time. Such approach is supported by optimization results and Langmuir isotherm. Results obtained were better with Freundlich than with Langmuir isotherm, confirming the presence of heterogeneous monolayer with reversible binding sites. The biosorption mean energy inferred that chemisorption occurred in Lead (II) biosorption, and pseudo-second-order kinetics implied that chemisorption mechanism is the rate-limiting factor. Thermodynamic described an endothermic non-spontaneous reaction with reversible bonding between Lead (II) ions and binding sites. Characterization analysis further confirmed a macroporous surface morphology with multi-binding sites of hydroxyl, carboxyl, and amide groups which contributed to reversible bonding in chemisorption mechanism. The 85 % of recovery supported reversible binding in chemisorption. The biosorbent is at least 70 times cheaper than resins. Hence, this developed biosorbent is a potential candidate to replace resins and can be used in the pretreatment of industrial wastewater application due to cost effectiveness and low environmental impacts. This study successfully gains an insight into green technology by converting waste to a useable product and zero waste concept by minimizing environmental solid management and pollution control.
机译：来自铅酸电池和印刷线路板行业的含铅（II）废水，由于其毒性和持久特性，对人体健康和环境有害。这项研究的重点是生态工业Lutjanus erythropterus鱼骨粉废料作为生物吸附剂，用于去除铅（II）。在这项研究中，研究了生物吸附剂的优化，等温线，动力学，热力学，生物吸附剂表征的效果，并将生物吸附剂的特性与市售树脂进行了比较。确定生物吸附剂的半饱和去除量为0.09 g，以代表与生物吸附剂相比在实际工业废水条件下过量的金属，并最大程度地减少化学药品的消耗和生物吸附操作时间。优化结果和Langmuir等温线均支持这种方法。 Freundlich所获得的结果要好于Langmuir等温线，从而证实了具有可逆结合位点的异质单层的存在。生物吸附的平均能量可以推断化学吸附发生在铅（II）的生物吸附中，伪二级动力学暗示化学吸附的机理是速率限制因素。热力学描述了吸热的非自发反应，在铅（II）离子和结合位点之间具有可逆键合。表征分析进一步证实了具有羟基，羧基和酰胺基的多个结合位点的大孔表面形态，这有助于化学吸附机理中的可逆键合。 85％的回收率支持化学吸附中的可逆结合。生物吸附剂比树脂便宜至少70倍。因此，这种开发的生物吸附剂是替代树脂的潜在候选者，由于成本效益和对环境的影响小，可用于工业废水的预处理。这项研究通过最大限度地减少环境固体管理和污染控制，将废物转化为可用产品和零废物概念，成功地获得了对绿色技术的深刻理解。

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