天然及处理黏粒红土对水体磷的吸附性能比较  

Comparative Analysis of Natural and Treated Clay Laterites in Phosphate Adsorption Capacity in Water

作　　者：韩承辉[1] 李胜生[2] 何斐[3] 干方群[1] 唐荣[1] 秦品珠[1] 杭小帅[3] HANCheng-hui LI Sheng-sheng HE Fei GAN Fang-qun TANG Rong QIN Pin-zhu HANG Xiao-shuai(College of Environment and Ecology,Jiangsu Open University （The City Vocational College of J iangsu） ,Nanjing 210017, China Institute of Geoanalysis of Anhui Province, Hefei 230001,China Nanjing Institute of Environmental Sciences, Min-istry of Environmental Protection, Nanjing 210042,China)

机构地区：[1]江苏开放大学(江苏城市职业学院)环境与生态学院,江苏南京210017 [2]安徽省地质实验研究所,安徽合肥230001 [3]环境保护部南京环境科学研究所,江苏南京210042

出　　处：《生态与农村环境学报》2017年第1期91-96,共6页Journal of Ecology and Rural Environment

基　　金：江苏省高校自然科学研究(14KJB610003);江苏省环境工程重点实验室开放课题(KF2015001);苏北科技发展计划--科技富民强县项目(BN2012068)

摘　　要：通过模拟实验方法,比较了8种天然黏粒红土和焙烧、天然矿物复配等处理的黏粒红土对磷污染水体的吸附净化能力,通过等温吸附探讨了黏粒红土的磷吸附机制。结果发现,8种供试天然黏粒红土对水体磷均具有一定的吸附净化能力,但对不同程度磷污染水体净化能力存在差异;针对Ⅴ类水和劣Ⅴ类水,均以江西黏粒红土表现出最高的磷吸附净化能力;天然黏粒红土的磷吸附等温曲线与Freundlich方程拟合显著,说明黏粒红土对磷的吸附属于不均匀介质的多分子层吸附;在磷初始浓度为200 mg·L-1时,天然黏粒红土对磷的吸附容量最高可达2.38 mg·g-1。此外,焙烧能显著增强黏粒红土对磷污染水体的吸附能力,黏粒红土可以作为磷污染水体的潜在吸附材料,针对实际水体可选用不同处理方法来提高其对污水磷的吸附净化效率。Phosphorus adsorption capacities of 8 types of natural clay laterites and treated （ roasted or spiked with natural minerals） clay laterites in phosphorus-polluted water were investigated in a simulation experiment and mechanisms of the laterites adsorbing phosphorus explored through isothernal adsorption. Results show that all the 8 types of natural clay lat-erites were more or less able to adsorb phosphorus in water, but they varied in perfornance in waters different in pollution degree. The clay laterite from Jiangxi province was the highest in P removal efficiency in wastewaters of Grade V or Grade V on the lower side. The Freundlich equation fitted well with phosphate adsorption isothermal cures of the natural clay lat-erites in terms of R2 value, which indicates that the adsorption was in the form of inhomogeneous multi-molecular-layer ad-sorption. In wastewater with the initial phosphorus concentration reaching 200 mg .L -1,the natural lay laterites might ad-sorb as much as 2. 38 mg ？ g 1 phosphorus. Roasting or baking significantly enhanced the soilsr phosphate adsorption ca-pacity. Spiking natural minerals did not have much effect on phosphorus adsorption capacity of the soils, but could effec-tively neutralize acidity of the effluents. All the findings demonstrate that clay laterites can be used potentially as adsorbent to purify phosphorus-polluted wastewater, and different processing methods should be adopted to improve P adsorption and wastewater purification efficiency of the materials.

关 键 词：黏粒红土 磷 吸附性能 污染水体 

分 类 号：X52[环境科学与工程—环境工程] P579[天文地球—矿物学]