The Cd(II) adsorption of kiwi biochar functionalized with Mg-Fe (3:1) layered double hydroxides (LDH) was studied. And the biochar was got via liquid-phase deposition, by incorporating Mg-Fe layered double hydroxide (Mg-Fe LDH) particles into kiwi biochar (KB/LDH). The batch of sorption experiments were studied, including adsorption kinetics and isotherm and the effects of pH, ion strength (IS) and co-existing ions. The KB/LDH composite showed a strong sorption ability to Cd(II) in aqueous solutions with the adsorption capacity of 25.6 mg g⁻¹, compared with pristine biochar of 1.78 mg g⁻¹. The adsorption of Cd(II) on KB/LDH composite increased with the decreasing of IS, decreased first and then grew larger with the increase of pH and was observed irrespective of the co-existence of K⁺, Cl⁻ and NO₃⁻. To sum up, the KB/LDH can be potentially used as an alternative adsorbent to amend the water and soil contaminated by Cd(II).

研究了用Mg-Fe（3：1）层状双氢氧化物（LDH）功能化的奇异果生物炭对Cd（II）的吸附。通过将Mg-Fe层状双氢氧化物（Mg-Fe LDH）颗粒掺入猕猴桃生物炭（KB / LDH）中，通过液相沉积获得生物炭。研究了一批吸附实验，包括吸附动力学和等温线以及pH，离子强度（IS）和共存离子的影响。KB / LDH复合材料在水溶液中对Cd（II）的吸附能力强，吸附能力为25.6 mg g ^-1，而原始生物炭为1.78 mg g ^-1。KB / LDH复合材料对Cd（II）的吸附随着IS的减少而增加，随pH的增加先下降然后增大，并且与K共存无关。⁺，氯^-和NO ₃ ^- 。综上所述，KB / LDH可以潜在地用作替代吸附剂，以修正被Cd（II）污染的水和土壤。