Humic acid (HA) has a high complexation ability with metal ions due to its functional groups. In this study, 11 synthetic humic-like acids (SHLAs) were prepared under varying abiotic humification conditions: precursor species (glycine-catechol and glycine-catechol-glucose), precursor concentrations (from 0.25 M:0.25 M to 1 M:1 M), pH (6–8), temperature (25–45 °C) and mass of MnO₂ catalyst (1.3–2.5% w/v). The effect of the varying humification conditions on the complexation ability of the SHLA for Cu²⁺ were investigated together with the relationships between Cu complexation ability and the structure of the SHLAs (elemental composition, type and content of functional groups, AL/AR, E₄/E₆). Conditional stability constants (log K) of the SHLAs ranged from 6.00 to 6.42 and complexation capacities ranged from 1.76 mmol/g to 2.61 mmol/g. SHLAs synthesized at lower temperature (25 ℃), pH 8, low precursor concentrations (glycine:catechol= 0.25 M:0.25 M) and a larger proportion of catalyst (2.5% w/v) had a larger copper complexation ability. Log K values of SHLAs had significant positive correlations with carboxylic carbon (r = 0.671, p < 0.05), carboxylic group content (r = 0.890, p < 0.01) and O/C ratio (r = 0.618, p < 0.05), and significant negative correlations with aliphatic carbon (r = −0.616, p < 0.05), total C (r = −0.685, p < 0.05) and total H contents (r = −0.654, p < 0.05). Complexation capacities had a significant positive correlation with total N (r = 0.826, p < 0.01) and a significant negative correlation with C/N ratio (r = −0.823, p < 0.01).

腐殖酸（HA）由于其官能团而具有与金属离子的高络合能力。在这项研究中，在不同的非生物腐殖化条件下制备了11种合成腐殖酸（SHLA）：前体物种（甘氨酸-邻苯二酚和甘氨酸-邻苯二酚-葡萄糖），前体浓度（从0.25 M：0.25 M到1 M：1 M ），pH（6-8），温度（25-45°C）和MnO ₂催化剂质量（1.3-2.5％w / v）。研究了不同腐殖化条件对SHLA对Cu ²⁺络合能力的影响，以及Cu络合能力与SHLA结构（元素组成，官能团类型和含量，AL / AR，E的关系）之间的关系。₄ / E ₆）。条件稳定性常数（对数SHLA的K）为6.00至6.42，络合能力为1.76 mmol / g至2.61 mmol / g。在较低温度（25℃），pH 8，低前体浓度（甘氨酸：儿茶酚＝ 0.25 M：0.25 M）和较大比例的催化剂（2.5％w / v）下合成的SHLA具有较大的铜络合能力。记录KSHLAs值与羧基碳（r = 0.671，p <0.05），羧基含量（r = 0.890，p <0.01）和O / C比（r = 0.618，p <0.05）呈显着正相关，显着负相关与脂肪族碳的相关性（r = -0.616，p <0.05），总C（r = -0.685，p <0.05）和总H含量（r = -0.654，p <0.05）。络合能力与总氮呈显着正相关（r = 0.826，p <0.01），与C / N比呈显着负相关（r = -0.823，p <0.01）。