秸秆生物质环境材料的制备及对水中多环芳烃的处理性能  

Preparation Method of Stalk Environmental Biomaterial and Its Sorption Ability for Polycyclic Aromatic Hydrocarbons in Water

作　　者：何娇[1] 孔火良[1] 韩进[1] 高彦征[1] 

机构地区：[1]南京农业大学土壤有机污染控制与修复研究所,南京210095

出　　处：《环境科学》2011年第1期135-139,共5页Environmental Science

基　　金：国家自然科学基金项目(21077056;41071212;40701073);江苏省自然科学基金项目(BK2009315);霍英东教育基金项目(122045)

摘　　要：300～700℃下热解炭化黄豆、芝麻、玉米秸秆8h,制备了秸秆生物质环境材料,测定了秸秆生物质环境材料的BET比表面积及其对亚甲基蓝和碘的吸附能力.以多环芳烃(PAHs)为目标污染物,探讨了生物质环境材料对水中单一和复合PAHs的吸附性能.结果表明,随热解温度升高,秸秆生物质环境材料比表面积增大,其对亚甲基蓝、碘的吸附能力增强.所制备的生物质环境材料吸附水中PAHs的能力强,以700℃下制备的黄豆秸秆生物质环境材料为例,0.01 g材料对32 mL水中萘、苊、菲的去除率分别高达91.28%、89.01%和99.66%;生物质环境材料对水中3种PAHs的去除率大小顺序为菲>萘>苊.不同秸秆制备的生物质环境材料对水中萘和苊的去除能力大小为玉米>黄豆>芝麻,而对菲的去除能力则为黄豆>玉米>芝麻.研究结果可为农作物秸秆的资源化利用、制备经济高效的生物质环境材料等提供依据.The soybean, sesame and corn stalks were pyrolyzed and charred for 8 h at 300-700℃ to obtain stalk environmental biomaterials. The BET specific surface areas, methylene blue, and iodine adsorption capacity of the stalk environmental biomaterials were determined. The sorption efficiency of these materials on single polycyclie aromatic hydrocarbon（PAH） and mixing PAHs were investigated. The BET specific surface areas of stalk biomaterials enlarged, and the sorption ability on methylene blue and iodine enhanced with increasing the treatment temperature. The obtained stalk biomaterials could effectively remove the PAHs from water. For instance, 91.28% , 89.01% and 99.66% of naphthalene, acenaphthene, and phenanthrene in 32 mL water were removed by 0. 01 g biomaterials obtained by soybean stalk at 700~C. The removal efficieneies of biomaterials for mixed PAHs in water were in the order of phenanthrene 〉 naphthalene 〉 acenaphthene. However, the sorption ability of produced stalk biomaterials differed significantly, and followed the order of corn 〉 soybeans 〉 sesame for the removal of naphthalene and aeenaphthene, and soybean 〉 corn 〉 sesame for phenanthrene removal in water. Results of this work would provide some insight into the reuse of crop stalks, and also open a new view on the treatment of organic polluted water utilizing biomaterials.

关 键 词：秸秆 生物质环境材料 多环芳烃(PAHs) 吸附 制备 

分 类 号：X712[环境科学与工程—环境工程] X52