This study investigated and compared the influence of pretreatments (heat and chemical) on banana peels and their subsequent efficacy in removing toxic metals (Cu, Pb, Zn, Cd) from single and multimetal systems. Banana peels were pretreated using heat (autoclaving, microwaving, boiling) and chemical (acetic acid, nitric acid, NaOH, detergent, methanol, and DMSO) treatments, prior to biosorption tests. Results revealed that pretreatment using detergent enabled banana peels to biosorb metals at relatively higher amounts in both single (Cu-96.26%, Pb-96.72%, Zn-95.75%, Cd-96.92%) and multimetal (Cu-92.43%, Pb-95.91%, Zn-91.88%, Cd-94.42%) systems. Biosorption by detergent-treated peels were profoundly effective when 0.10 g was used, with initial metal concentration of 10 mg/l, agitation speed of 120 rpm and a solution with pH 5. Characterization of detergent pretreated banana peels via FTIR analysis showed that different pretreatments applied did not significantly modify the presence of functional groups. As such, the preexisting functional groups such as hydroxyl, amino, carboxyl, and carbonyl groups were deemed responsible for metal removal. SEM-EDX analysis on detergent pretreated peels suggested that improvement to metal removal may be attributed to enlarged pore size. This suggested that pretreatment with detergent, and as with most chemicals, presented a more feasible and economical approach than heat treatments to successfully enhance metal biosorption by banana peels for wastewater treatment.

这项研究调查并比较了预处理（加热和化学处理）对香蕉皮的影响以及它们从单金属和多金属系统中去除有毒金属（铜，铅，锌，镉）的功效。在生物吸附测试之前，使用加热（高压灭菌，微波，沸腾）和化学（乙酸，硝酸，NaOH，去污剂，甲醇和DMSO）处理对香蕉皮进行预处理。结果表明，使用去污剂进行预处理可使香蕉皮以相对较高的量吸附金属，无论是单一金属（Cu-96.26％，Pb-96.72％，Zn-95.75％，Cd-96.92％）还是多金属（Cu-92.43％，Pb- 95.91％，Zn-91.88％，Cd-94.42％）体系。当使用0.10 g，初始金属浓度为10 mg / l，搅拌速度为120 rpm和pH为5的溶液时，去污剂处理过的果皮的生物吸附作用非常有效。通过FTIR分析对洗涤剂预处理的香蕉皮进行表征，结果表明，采用的不同预处理方法不会显着改变官能团的存在。这样，认为预先存在的官能团例如羟基，氨基，羧基和羰基负责金属去除。SEM-EDX对去污剂预处理过的果皮的分析表明，金属去除性能的提高可能归因于孔径的扩大。这表明用洗涤剂和大多数化学药品进行预处理比通过热处理来成功地提高香蕉皮对废水的金属生物吸附能力提供了一种比热处理更可行，更经济的方法。预先存在的官能团（例如羟基，氨基，羧基和羰基）被认为是造成金属去除的原因。SEM-EDX对去污剂预处理过的果皮的分析表明，金属去除性能的提高可能归因于孔径的扩大。这表明用洗涤剂和大多数化学药品进行预处理比通过热处理来成功地提高香蕉皮对废水的金属生物吸附能力提供了一种比热处理更可行，更经济的方法。预先存在的官能团（例如羟基，氨基，羧基和羰基）被认为是造成金属去除的原因。SEM-EDX对去污剂预处理过的果皮的分析表明，金属去除性能的提高可能归因于孔径的扩大。这表明用洗涤剂和大多数化学药品进行预处理比通过热处理来成功地提高香蕉皮对废水的金属生物吸附能力提供了一种比热处理更可行，更经济的方法。