In this study, the effect of biochar (BC) derived from Litchi chinensis Sonn. and its modification, including Ca-biochar (Ca-BC) and Fe-Mn-biochar (Fe-Mn-BC), on the transportation of oestrone (E1) in water and soil was investigated. Fe-Mn-BC showed better adsorption ability than other types of biochar (BC, Ca-BC) under different conditions (humic acid, pH, ionic strength) in an aqueous environment. The maximum mass of sorbent at 298 K increased from 1.12 mg g-1 (BC) to 4.18 mg g-1 (Fe-Mn-BC). Humic acid had a greater impact on aqueous E1 adsorption on these biochars than did the pH and ionic strength. Fe-Mn-BC as a soil amendment had a great control of E1 transport in soil, and no leachate of E1 was observed in the column experiment. E1 mobility showed strong retardation in amended soil with Ca-BC (Rf = 11.2) compared with raw soil (Rf = 7.1). These results suggested that Fe-Mn-BC was more effective in controlling E1 transportation, and Fe-Mn-BC could be used as an alternative and inexpensive adsorbent to reduce E1 contaminants from water and soil.

中文翻译：

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添加荔枝果实中的Ca-生物炭和Fe-Mn-生物炭后雌酮在水和土壤中的迁移特性。

在这项研究中，生物炭（BC）的来源来自荔枝Sonn。研究了其在水中和土壤中对雌酮（E1）的运输，包括Ca-生物炭（Ca-BC）和Fe-Mn-生物炭（Fe-Mn-BC）。Fe-Mn-BC在水性环境中的不同条件（腐殖酸，pH，离子强度）下显示出比其他类型的生物炭（BC，Ca-BC）更好的吸附能力。298 K时的最大吸附剂质量从1.12 mg g-1（BC）增加到4.18 mg g-1（Fe-Mn-BC）。腐殖酸对水在这些生物炭上的E1吸附的影响大于pH和离子强度。Fe-Mn-BC作为土壤改良剂对E1在土壤中的迁移有很好的控制，在柱实验中未观察到E1的浸出液。与未处理的土壤（Rf = 7.1）相比，使用Ca-BC的改良土壤中的E1迁移率表现出强烈的阻滞作用（Rf = 11.2）。