挺水植物生物炭对硫丹的吸附及催化水解作用

以美人蕉、菖蒲、芦苇、茭白、再力花、芦竹等挺水植物为原料，在限氧升温（550℃）条件下制备6种不同性质的生物炭，研究其组成及结构对硫丹吸附和催化水解作用.结果表明：550℃下热解，湿地植物生物炭所含灰分高于一般农产品废弃物，介于10.88%~31.11%间.生物炭表面芳香类官能团较多，孔隙部分呈碎片化，以介孔为主.6种生物炭对硫丹都具良好吸附性能.吸附行为主要发生在含致密有机质的生物炭表面，包括疏水、扩散及分配作用等.中/碱性条件下，美人蕉生物炭、菖蒲生物炭及再力花生物炭能有效去除水溶液中的硫丹，去除率为96.77%~98.57%.中性条件下，因生物炭对硫丹的催化，对硫丹的去除率提高约16.57%~72.57%.

Adsorption and catalytic hydrolysis of endosulfan on biochars derived from emergent plants

Six kinds of biochars derived from typically wetland plants were pyrolyzed under 550℃ without oxygen,the adsorption and catalytic hydrolysis behavior of these biochars towards endosulfan were investigated.The results showed that the ash contents were higher than other agricultural wastes,rangeing from 10.88% to 31.11%.The results of characterization suggested that the biochars had a mass of aromatic domains and pores on the surface of biochars.The pores were mainly mesopores and partly fragmented.All the biochars have high adsorption capacity toward endosulfan.The adsorption was mainly occurred on the surface of biochars which contained dense organic matter.Hydrophobic,diffusion and distribution effects played significant role in the process of adsorption.Under the conditions of neutral or alkali solutions,CAI-B,ACC-B and THD-B could efficiently remove endosulfan with uptake rates of 96.77% to 98.57%.Moreover,biochar could catalyze the hydrolysis of endosulfan with an increase of hydrolysis efficiency about 16.57%~72.57% under the condition of neutral solution.