Biomass activated carbon(BAC)was produced from ginger stems by carbonization and activation presented high specific surface areas and mesoporous structures.The carbonization temperature of the ginger stems were contro...Biomass activated carbon(BAC)was produced from ginger stems by carbonization and activation presented high specific surface areas and mesoporous structures.The carbonization temperature of the ginger stems were controlled within 500~900℃.The optimal carbonization condition is as follows:carbonization temperature of 700℃,carbonization time of 6 h.The determined optimum activation condition is:temperature of 800℃,activator of KOH and carbonized product/alkali ratio of 1:4(w/w).The carbonization yield,BAC yield and Brunauer-Emmett-Teller(BET)surface area were measured and the adsorption performance of BAC to nitrogen was investigated.The results showed that the nitrogen adsorption isotherm curve was as type I isotherm.It was finally determined that the BET surface area was 660 m2/g under the abovementioned optimal conditions of carbonization and activation.The FESEM analysis indicates that the obtained BAC is of micropore structure.展开更多
以玉米芯纤维浆为原料,在不同磷酸浓度下采用微波法制备了3种生物质活性炭,考察生物质活性炭对印染废水的吸附性能,并研究生物质活性炭的等温吸附、动力学吸附特性。结果表明:玉米芯纤维浆经30 mL 60%磷酸活化,制备的生物质活性炭吸附...以玉米芯纤维浆为原料,在不同磷酸浓度下采用微波法制备了3种生物质活性炭,考察生物质活性炭对印染废水的吸附性能,并研究生物质活性炭的等温吸附、动力学吸附特性。结果表明:玉米芯纤维浆经30 mL 60%磷酸活化,制备的生物质活性炭吸附性能最佳,该活性炭比表面积为250.534 m2/g,总孔体积为1.914 cm3/g。生物质活性炭易吸附模拟印染废水中的甲基橙和酸性大红GR,对甲基橙和酸性大红GR的去除率分别为99.64%和98.71%。生物质活性炭的等温吸附更接近Langmuir模型,吸附方式更接近于单分子层吸附,动力学吸附更符合拟二级动力学方程。展开更多
基金financially supported by the Natural Science Foundation of Shandong Province (ZR2017QB002)the key scientific research projects in Shandong Province (2018GGX104003)+2 种基金the Taishan Scholar Program of Shandong (ts201511033)the Foundation of Key Laboratory of Pulp and Paper Science and Technology of Ministry of Education/ Shandong Province of China(No.KF201705)Shandong Province major innovation project (2018CXGC1001)
文摘Biomass activated carbon(BAC)was produced from ginger stems by carbonization and activation presented high specific surface areas and mesoporous structures.The carbonization temperature of the ginger stems were controlled within 500~900℃.The optimal carbonization condition is as follows:carbonization temperature of 700℃,carbonization time of 6 h.The determined optimum activation condition is:temperature of 800℃,activator of KOH and carbonized product/alkali ratio of 1:4(w/w).The carbonization yield,BAC yield and Brunauer-Emmett-Teller(BET)surface area were measured and the adsorption performance of BAC to nitrogen was investigated.The results showed that the nitrogen adsorption isotherm curve was as type I isotherm.It was finally determined that the BET surface area was 660 m2/g under the abovementioned optimal conditions of carbonization and activation.The FESEM analysis indicates that the obtained BAC is of micropore structure.
文摘以玉米芯纤维浆为原料,在不同磷酸浓度下采用微波法制备了3种生物质活性炭,考察生物质活性炭对印染废水的吸附性能,并研究生物质活性炭的等温吸附、动力学吸附特性。结果表明:玉米芯纤维浆经30 mL 60%磷酸活化,制备的生物质活性炭吸附性能最佳,该活性炭比表面积为250.534 m2/g,总孔体积为1.914 cm3/g。生物质活性炭易吸附模拟印染废水中的甲基橙和酸性大红GR,对甲基橙和酸性大红GR的去除率分别为99.64%和98.71%。生物质活性炭的等温吸附更接近Langmuir模型,吸附方式更接近于单分子层吸附,动力学吸附更符合拟二级动力学方程。
