环境工程学报2017，Vol.11Issue(9)：5001-5006,6.DOI:10.12030/j.cjee.201609045
血粉对废水中镉离子的高效去除效应
High efficient removal effect of Cd2+ from wastewater by adsorption onto blood powder
摘要
Abstract
High efficient removal of Cd2+ in wastewater by blood powder was reported in this research.The results showed that the removal rate of Cd2+ in wastewater reached to 99.38％ when 100 mL wastewater with 20 mg· L-1Cd2+ was adsorbed by 4 g blood powder adsorbent after 2 hours at 25 ℃ and pH 5.The adsorption isotherms of blood powder to Cd2+ could be described by the Langmuir isotherm model (R2 =0.999 7).The value of maximum adsorption capacity was 10.24 mg · g-1 based on the analysis of Langmuir model.In order to get higher removal rate of Cd2 + , two steps adsorption were performed.In the first step adsorption, 5 g blood powder was added into 100 mL wastewater with 20 mg · L-1 Cd2+ in vibration at 25 ℃ and pH 5, followed by filtration after 2 hours.Then another 1 g blood powder was further added into the filtrate for the second adsorption under the same conditions.The results showed that residual concentration of Cd2+ further reduced to 0.006 mg · L-1after two steps of absorption, which reached the emission standard of wastewater (GB 21900-2008, Cd2+ < 0.05mg · L-1).These data showed that the blood powder had the higher removal capability of Cd2+ than activated carbon, sand, kaolinite and other regular adsorbents.Our results demonstrated an alternative way to the treatment of Cd2+-containing wastewater.关键词
血粉/废水/Cd2+去除效应Key words
blood powder/wastewater/Cd2+ removal effect分类
资源环境引用本文复制引用
李思彤,舒芳芳,王楠,陈红兵,李亚东,李顺意..血粉对废水中镉离子的高效去除效应[J].环境工程学报,2017,11(9):5001-5006,6.基金项目
国家重点研发计划(2016YFD0200900) （2016YFD0200900）
