Tartaric acid (TA) is an important component of plant rhizosphere secretion, having a certain influence on the adsorption and desorption behavior of heavy metals in soil. Humin could serve as an environmentally compatible passivator of heavy metal in soil. The aims of this study were to simulate the adsorption of Pb (II) via humin in a soil solution, explore the effects of TA on the adsorption of Pb (II) by humin and elucidate the mechanism of its influence. The results indicated that the adsorption of Pb (II) on the surface of humin within and without TA was consistent with the Langmuir isotherm equation and the pseudo-secondary kinetic model (R² > 0.99). The effect of TA on adsorption was related to the concentration of TA. With the increasing of TA concentration, the adsorption of Pb (II) by humin showed a peak change and the adsorption amount reached the maximum with 0.5 mmol L⁻¹ humin, is 192.31 mg L⁻¹ with 0.1 mmol TA. Basing on adsorption experiments and characterization of FTIR, SEM, EDX and XPS. It revealed that the oxygenated groups of TA can be combined with humin by hydrogen bonding, in the low concentration TA (less than 0.5 mmol L⁻¹), which is equivalent to an increment of the carboxyl group on the surface of humin, thus adsorption amount was increased. The increasing of the concentration of TA led to an increment of free TA in the solution, which would complex with the lead ions in the solution, and indirectly reduce the amount of Pb(II) adsorption on the humin.

酒石酸（TA）是植物根际分泌的重要成分，对土壤中重金属的吸附和解吸行为有一定影响。胡敏可以用作环境中的重金属钝化剂。本研究的目的是模拟腐殖质在土壤溶液中对Pb（II）的吸附，探讨TA对腐殖质对Pb（II）吸附的影响，并阐明其影响机理。结果表明，在有和没有TA的情况下，腐殖质表面上Pb（II）的吸附与Langmuir等温方程和拟二次动力学模型（R ² > 0.99）。TA对吸附的影响与TA的浓度有关。随着TA浓度的增加，腐殖质对Pb（II）的吸附呈现峰值变化，在0.5 mmol L ^-1腐殖质下吸附量最大，在0.1 mmol TA下为192.31 mg L ^-1。基于吸附实验和FTIR，SEM，EDX和XPS的表征。结果表明，在低浓度TA（小于0.5 mmol L ^-1）下，TA的氧化基团可以通过氢键与腐殖质结合。），这相当于腐殖质表面上羧基的增加，因此吸附量增加了。TA浓度的增加导致溶液中游离TA的增加，这将与溶液中的铅离子络合，并间接减少了腐殖质上Pb（II）的吸附量。