Sorption of ammonium and phosphate from aqueous solution by biochar derived from phytoremediation plants  

作　　者：Zheng ZENG Song-da ZHANG Ting-qiang LI Feng-liang ZHAO Zhen-li HE He-ping ZHAO Xiao-e YANG Hai-long WANG Jing ZHAO Muhammad Tariq RAFIQ 

机构地区：[1]Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University [2]Ningbo Raw Water Group Co., Ltd. [3]Indian River Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida [4]School of Environmental and Resource Sciences, Zhejiang A&F University

出　　处：《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》2013年第12期1152-1161,共10页浙江大学学报（英文版）B辑（生物医学与生物技术）

基　　金：supported by the International Cooperative Project from the Ministry of Science and Technology of China(No.2010DFB33960);the National Key Technology R&D Program of China(No.2012BAC17B02);the Zhejiang Youth Creative Program(No.2012QNA6004);the Key Project from Zhejiang Science and Technology Bureau(No.2011C13015),China

摘　　要：The study on biochar derived from plant biomass for environmental applications is attracting more and more attention. Twelve sets of biochar were obtained by treating four phytoremediation plants, Salix rosthornii Seemen, Thalia dealbata, Vetiveria zizanioides, and Phragmites sp., sequentially through pyrolysis at 500 °C in a N2 environment, and under different temperatures(500, 600, and 700 °C) in a CO2 environment. The cation exchange capacity and specific surface area of biochar varied with both plant species and pyrolysis temperature. The magnesium(Mg) content of biochar derived from T. dealbata(TC) was obviously higher than that of the other plant biochars. This biochar also had the highest sorption capacity for phosphate and ammonium. In terms of biomass yields, adsorption capacity, and energy cost, T. dealbata biochar produced at 600 °C(TC600) is the most promising sorbent for removing contaminants(N and P) from aqueous solution. Therefore, T. dealbata appears to be the best candidate for phytoremediation application as its biomass can make a good biochar for environmental cleaning.The study on biochar derived from plant biomass for environmental applications is attracting more and more attention. Twelve sets of biochar were obtained by treating four phytoremediation plants, Salix rosthorni Seemen, Thalia dealbata, Vetiveria zizanioides, and Phragmites sp., sequential y through pyrolysis at 500 °C in a N2 environ-ment, and under different temperatures （500, 600, and 700 °C） in a CO2 environment. The cation exchange capacity and specific surface area of biochar varied with both plant species and pyrolysis temperature. The magnesium （Mg） content of biochar derived from T. dealbata （TC） was obviously higher than that of the other plant biochars. This bi-ochar also had the highest sorption capacity for phosphate and ammonium. In terms of biomass yields, adsorption capacity, and energy cost, T. dealbata biochar produced at 600 °C （TC600） is the most promising sorbent for removing contaminants （N and P） from aqueous solution. Therefore, T. dealbata appears to be the best candidate for phyto-remediation application as its biomass can make a good biochar for environmental cleaning.

关 键 词：BIOCHAR Nutrient removal Plant species Pyrolysis temperature Water quality 

分 类 号：X703[环境科学与工程—环境工程]