Besides excellent adsorption performance of adsorbents, the disposal of spent adsorbents should be considered for environmental concern. In this study, a new all-biomass double network Jute/sodium alginate (Jute/SA) gel is prepared via the simple dripping technique. 80 wt% water of Jute/SA hydrogel endows the adsorbent with high permeability for heavy metal ions diffusion onto internal adsorption sites. The Jute/SA gel adsorbent can efficiently remove heavy metals from melting wastewater, especially Pb²⁺ and Cd²⁺. The adsorbent shows high adsorption capacities of 291.3 mg g⁻¹ for Pb²⁺ and 149.9 mg g⁻¹ for Cd²⁺ at 298 K. The adsorption equilibrium reaches within 45 min for 45 mg L⁻¹ Cd²⁺ and Pb²⁺ using 1 g L⁻¹ adsorbent, showing 98% removal efficiency of Pb²⁺ and Cd²⁺. Moreover, the removal efficiencies in 45 min reach up to 99.1% for Pb²⁺ (7.539 mg L⁻¹) and 89.9% for Cd²⁺ (4.743 mg L⁻¹) in actual melting effluent containing Zn (43.95 mg L⁻¹), Cu (16.50 mg L⁻¹), Mn (19.24 mg L⁻¹), Ni (4.90 mg L⁻¹) and Fe (33.75 mg L⁻¹) using 1 g L⁻¹ adsorbent. The concentrations of Pb and Cd decrease below 0.001 mg L⁻¹ using 4 g L⁻¹ adsorbent. Furthermore, the adsorption efficiencies for Pb²⁺ and Cd²⁺ remain above 95% in the tenth cycle, and the desorption efficiency is up to 99%. In addition, the spent Jute/SA gel was a good organic fertilizer for plant growth. This work develops an efficient and eco-friendly biomass adsorbent for the removal of heavy metals in actual wastewater.

除了出色的吸附剂​​吸附性能外，出于环境考虑，还应考虑处理用过的吸附剂。在这项研究中，通过简单的滴注技术制备了一种新的全生物质双网络黄麻/海藻酸钠（Jute / SA）凝胶。80％（重量）的黄麻/ SA水凝胶赋予吸附剂高渗透性，使重金属离子扩散到内部吸附位点上。Jute / SA凝胶吸附剂可以有效地去除熔融废水中的重金属，尤其是Pb ²⁺和Cd ²⁺。291.3毫克克吸附剂显示出高的吸附容量^-1对Pb ²⁺和149.9毫克克^-1镉²⁺在45分钟内在298K吸附平衡达到45毫克的L使用1 g L ^-1吸附剂的^-1 Cd ²⁺和Pb ²⁺，显示Pb ²⁺和Cd ^2+的去除效率为98％。此外，在45去除率分钟高达99.1％对Pb ²⁺（7.539毫克的L ^-1）和89.9％镉²⁺（4.743毫克的L ^-1在含有Zn实际熔化流出物（43.95毫克L）^-1），使用1 g L ^-1吸附剂的Cu（16.50 mg L ^-1），Mn（19.24 mg L ^-1），Ni（4.90 mg L ^-1）和Fe（33.75 mg L ^-1）。铅和镉的浓度降至0.001 mg L ^-1以下使用4 g L ^-1吸附剂。此外，在第十个循环中，Pb ²⁺和Cd ²⁺的吸附效率保持在95％以上，并且解吸效率高达99％。另外，用过的黄麻/ SA凝胶是植物生长的良好有机肥料。这项工作开发了一种高效，环保的生物质吸附剂，用于去除实际废水中的重金属。