Abstract

Cadmium contamination is a global concern because of its widespread nature of polluting both biotic and abiotic components of ecosystem. Though many natural, chemical/synthetic components have been researched for remediation of cadmium, development of an eco-friendly, economic biosorbent still remains a challenge. Deoiled palm kernel cake (DOPC), a byproduct from palm-oil mills was investigated in the present study for its cadmium remediating capacity. DOPC was immobilized using sodium alginate polymer and biosorption studies were carried out using DOPC as adsorbent for removal of cadmium. Research revealed biosorption potential of DOPC and the optimum conditions for maximum biosorption of cadmium have been identified as 120 min of contact time, 150 rpm of agitation speed, pH 6 and 15 mg/L of initial cadmium concentration. Maximum percentage of adsorption was 99% by using 1.5 g/100 ml of adsorbent. The adsorption equilibrium data Biosorbent was characterized before and after adsorption by FTIR which showed the involvement of carboxyl, hydroxyl and amino-groups.

Statement of novelty Cadmium pollution and the leading environmental problems is a global concern. Despite various attempts for development of different matrices for remediation of cadmium from contaminated samples, application of deoiled palm kernel cake (DOPC) as a biosorbent is not being explored. Present study provides quantitative data relating the richness of phytochemical repertoire DOPC possess, its resulting radical scavenging potential and its applications as an efficient, eco-friendly and economic alternative as a biosorbent matrix material for cadmium bio-remediation.

抽象的

镉污染是全球关注的问题，因为其广泛污染自然生态系统的生物和非生物成分。尽管已经研究了许多天然的化学/合成成分来修复镉，但是开发一种环保，经济的生物吸附剂仍然是一个挑战。在本研究中，对棕榈油厂的副产品脱油棕榈仁饼（DOPC）的镉修复能力进行了研究。使用藻酸钠聚合物固定DOPC，并使用DOPC作为吸附剂去除镉进行生物吸附研究。研究表明，已经确定了DOPC的生物吸附潜力和最大的镉生物吸附的最佳条件是接触时间为120分钟，搅拌速度为150 rpm，pH为6且初始镉浓度为15 mg / L。通过使用1.5 g / 100 ml吸附剂，最大吸附百分比为99％。FTIR吸附前后对吸附平衡数据进行了表征，结果表明羧基，羟基和氨基均参与了吸附。

新颖性声明镉污染和主要的环境问题已成为全球关注的问题。尽管开发了各种用于从污染样品中修复镉的基质的尝试，但尚未探索将脱油的棕榈仁饼（DOPC）用作生物吸附剂的应用。目前的研究提供了定量数据，这些数据涉及DOPC拥有的丰富的植物化学成分，其产生的自由基清除潜力以及其作为有效，生态友好和经济的替代品（作为镉生物修复的生物吸附性基质材料）的应用。