Korea Biochar Research Center, Department of Biological Environment, Kangwon National University, Chuncheon 200-701, Republic of Korea.
Bioresour Technol. 2012 Aug;118:536-44. doi: 10.1016/j.biortech.2012.05.042. Epub 2012 May 18.
Conversion of crop residues into biochars (BCs) via pyrolysis is beneficial to environment compared to their direct combustion in agricultural field. Biochars developed from soybean stover at 300 and 700 °C (S-BC300 and S-BC700, respectively) and peanut shells at 300 and 700 °C (P-BC300 and P-BC700, respectively) were used for the removal of trichloroethylene (TCE) from water. Batch adsorption experiments showed that the TCE adsorption was strongly dependent on the BCs properties. Linear relationships were obtained between sorption parameters (K(M) and S(M)) and molar elemental ratios as well as surface area of the BCs. The high adsorption capacity of BCs produced at 700 °C was attributed to their high aromaticity and low polarity. The efficacy of S-BC700 and P-BC700 for removing TCE from water was comparable to that of activated carbon (AC). Pyrolysis temperature influencing the BC properties was a critical factor to assess the removal efficiency of TCE from water.
与在农业领域直接燃烧相比，通过热解将农作物秸秆转化为生物炭（BC）对环境更有利。在 300 和 700°C 下分别用大豆秸秆（S-BC300 和 S-BC700）和花生壳（P-BC300 和 P-BC700）制备的生物炭用于从水中去除三氯乙烯（TCE）。批量吸附实验表明，TCE 的吸附强烈依赖于 BC 的性质。吸附参数（K(M)和 S(M)）与摩尔元素比以及 BC 的表面积之间存在线性关系。在 700°C 下制备的 BC 具有高芳香度和低极性，因此具有高吸附能力。S-BC700 和 P-BC700 从水中去除 TCE 的效果可与活性炭（AC）相媲美。热解温度影响 BC 性质是评估 TCE 从水中去除效率的关键因素。
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