Biomasses obtained from green remediation strategies can represent a new valuable feedstock for obtaining fine chemicals and/or next generation liquid fuels. A sustainable chain of technologies for recovering chemicals from poplar grown in a multi-contaminated area is presented here in this work. A pre-treatment based on the use of performic acid (generated in situ from formic acid and hydrogen peroxide) was designed and tested. The effect of this pre-treatment was measured in terms of delignification, the increased enzymatic digestibility of the solid residues, and final destination of the mineral components initially present in poplar biomass. Upon treatment with performic acid at 1.75, 3.5 and 7 M, the content of lignin in the residual biomasses resulted as being significantly reduced: 28.5, 92.8 and 100% of initial lignin were removed and dissolved. After this pre-treatment, most of minerals initially present in poplar biomass were dissolved during the generated aqueous phase. In concomitance, a large part of the initial lignin and xylose were also dissolved. The solid residues obtained from the pre-treatment phase were then subjected to hydrolysis. Enzymatic digestibility was proven to be already effective on samples pre-treated with 3.5 M performic acid at 55 °C. Indeed, even when lignin was not completely removed (>75%), the cellulose in the residual biomasses was completely hydrolysed in glucose through a commercial cellulase (from Trichoderma reesei). Finally, the aqueous solution obtained from enzymatic hydrolysis was effectively reacted in presence of AlCl₃·6H₂O (1%) and sulphuric acid (0.5%) at 150 °C for 45 min. A final yield of 68.2% of levulinic acid and 4.8% of hydroxymethyl furfural were eventually obtained. Through this process, not only were the majority of metals coming from the plant-assisted bioremediation process/strategy confined to an aqueous solution, but also residual poplar biomasses were valorised by generating platform molecules which might find applications in the production of fine-chemicals.

从绿色修复策略中获得的生物质可以代表一种新的有价值的原料，用于获得精细化学品和/或下一代液体燃料。本文介绍了从多污染地区种植的杨树中回收化学品的可持续技术链。设计和测试了基于使用过甲酸（由甲酸和过氧化氢原位产生）的预处理。这种预处理的效果是根据脱木质素、增加的固体残留物的酶消化率以及最初存在于杨树生物质中的矿物成分的最终目的地来衡量的。在用 1.75、3.5 和 7 M 的过甲酸处理后，残余生物质中的木质素含量显着降低：28.5、92。8% 和 100% 的初始木质素被去除并溶解。在这种预处理之后，最初存在于杨树生物质中的大部分矿物质在生成的水相中溶解。同时，大部分初始木质素和木糖也溶解了。然后将从预处理阶段获得的固体残余物进行水解。酶消化率已被证明对在 55 °C 下用 3.5 M 过甲酸预处理的样品已经有效。事实上，即使木质素没有完全去除（>75%），残留生物质中的纤维素也通过商业纤维素酶在葡萄糖中完全水解（来自 大部分初始木质素和木糖也溶解了。然后将从预处理阶段获得的固体残余物进行水解。酶消化率已被证明对在 55 °C 下用 3.5 M 过甲酸预处理的样品已经有效。事实上，即使木质素没有完全去除（>75%），残留生物质中的纤维素也通过商业纤维素酶在葡萄糖中完全水解（来自 大部分初始木质素和木糖也溶解了。然后将从预处理阶段获得的固体残余物进行水解。酶消化率已被证明对在 55 °C 下用 3.5 M 过甲酸预处理的样品已经有效。事实上，即使木质素没有完全去除（>75%），残留生物质中的纤维素也通过商业纤维素酶在葡萄糖中完全水解（来自里氏木霉）。最后，酶解得到的水溶液在AlCl ₃ ·6H ₂ O（1%）和硫酸（0.5%）存在下于150 ℃反应45 min。最终得到68.2%的乙酰丙酸和4.8%的羟甲基糠醛。通过这个过程，不仅来自植物辅助生物修复过程/策略的大部分金属被限制在水溶液中，而且残留的杨树生物质也通过生成可能在精细化学品生产中得到应用的平台分子而获得价值。