Guayjarernpanishk Wannipa, Sampanpanish Pantawat
Interdisciplinary Program in Environmental Science, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand.
Environmental Research Institute, Chulalongkorn University (ERIC), 254 Phayathai Road, Pathumwan, Bangkok, 10330, Thailand.
Heliyon. 2024 Feb 16;10(4):e26590. doi: 10.1016/j.heliyon.2024.e26590. eCollection 2024 Feb 29.
The accumulation and uptake efficiency of heavy metals, including As, Mn, and Cu, in water hyacinth ( (Mart.) Solms) grown in synthetic acidic wastewater supplemented with sodium phytate (SP) was examined. Three treatments were studied using synthetic acidic wastewater containing 0.25, 5.0, and 1.0 mg/L of As, Mn, and Cu, respectively, (SM + heavy metals) and having pH in the range of 4-6, which comprised of (1) control treatments using SM + heavy metals at pH 4, 5, 6 without SP, and treatments using SM + heavy metals at pH 4, 5, 6 with SP: Cu (2) in a 1:3 M ratio and (3) a 1:6 M ratio. The translocation factor (TF < 1) indicated that plants had a lower capacity to transport heavy metals from the roots to the stems. The shoots of water hyacinth exhibited the highest capacity to absorb and store As in the pH 4-treatment with SP (SP:Cu1:3 mol), whereas the roots showed the greatest capacity at pH 4 without SP. The roots and shoots of the water hyacinth showed the greatest capacity to take up and store Mn in the pH 5-treatment with a 1:3 M ratio of SP:Cu. The roots showed the greatest capacity to take up and store Cu in the pH 6-treatment, and the shoots showed the highest capability in the pH 5-treatment with 1:3 M ratio of SP:Cu. Moreover, analysis of the chemical forms revealed that As accumulated in the arsenate form, whereas Mn accumulated in the divalent form.
研究了在添加了植酸钠（SP）的合成酸性废水中生长的凤眼莲（(Mart.) Solms）对包括砷、锰和铜在内的重金属的积累和吸收效率。使用分别含有0.25、5.0和1.0 mg/L砷、锰和铜的合成酸性废水（SM + 重金属）进行了三种处理，其pH值在4 - 6范围内，包括：(1) 在pH值为4、5、6时不添加SP的SM + 重金属对照处理，以及在pH值为4、5、6时添加SP的处理：铜 (2) 比例为1:3 M和 (3) 比例为1:6 M。转运系数（TF < 1）表明植物将重金属从根部转运到茎部的能力较低。在添加SP（SP:Cu 1:3 mol）的pH 4处理中，凤眼莲的地上部分表现出吸收和储存砷的最高能力，而在不添加SP的pH 4处理中，根部表现出最大能力。在SP:Cu比例为1:3 M的pH 5处理中，凤眼莲的根部和地上部分表现出吸收和储存锰的最大能力。在pH 6处理中，根部表现出吸收和储存铜的最大能力，而在SP:Cu比例为1:3 M的pH 5处理中，地上部分表现出最高能力。此外，化学形态分析表明，砷以砷酸盐形式积累，而锰以二价形式积累。
