Abstract The brewing by-product brewer’s yeast biomass (BYB) was evaluated as a bioadsorbent for removal of basic dyes and lead from aqueous solutions. The functional groups including the hydroxyl group and cyano group are the major sources of adsorption by BYB. The adsorption of dyes on BYB was negatively correlated with temperature, whereas with lead, it was positively correlated with temperature. The adsorption kinetic of methylene blue (MB), malachite green (MG), and lead on BYB were identified as pseudo-second order, whereas safranin O (SO) was identified as pseudo-first order. A low dosage of BYB effectively adsorbed four adsorbates and reached equilibrium in 3–5 min. The maximum monolayer adsorption capacities of BYB for MB, MG, SO, and lead were 212.05, 212.05, 76.77, and 106.88 mg/g, respectively.

中文翻译：

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啤酒酵母生物质去除水中碱性染料和铅的潜力

摘要 酿造副产品啤酒酵母生物质 (BYB) 被评估为一种生物吸附剂，用于去除水溶液中的碱性染料和铅。羟基和氰基等官能团是 BYB 吸附的主要来源。BYB对染料的吸附与温度呈负相关，而对铅的吸附与温度呈正相关。亚甲蓝 (MB)、孔雀石绿 (MG) 和铅在 BYB 上的吸附动力学被确定为伪二级，而番红 O (SO) 被确定为伪一级。低剂量的 BYB 可有效吸附四种吸附物并在 3-5 分钟内达到平衡。BYB 对 MB、MG、SO 和铅的最大单层吸附容量分别为 212.05、212.05、76.77 和 106.88 mg/g。