天然及处理黏粒红土对水体磷的吸附性能比较

doi:10.11934/j.issn.1673-4831.2017.01.013

生态与农村环境学报 ›› 2017, Vol. 33 ›› Issue (1): 91-96.doi: 10.11934/j.issn.1673-4831.2017.01.013

• 污染控制与修复 • 上一篇

天然及处理黏粒红土对水体磷的吸附性能比较

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

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

收稿日期:2016-01-29 出版日期:2017-01-25 发布日期:2017-01-22
通讯作者: 杭小帅,E-mail:hangxiaoshuai@163.com E-mail:hangxiaoshuai@163.com
作者简介:韩承辉(1969-),男,江苏盐城人,副教授,博士,主要从事多项催化和污水处理研究。E-mail:hanch69@sina.com
基金资助:
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）

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

HAN Cheng-hui¹, LI Sheng-sheng², HE Fei³, GAN Fang-qun¹, TANG Rong¹, QIN Pin-zhu¹, HANG Xiao-shuai³

1. College of Environment and Ecology, Jiangsu Open University(The City Vocational College of Jiangsu), Nanjing 210017, China;
2. Institute of Geoanalysis of Anhui Province, Hefei 230001, China;
3. Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China

Received:2016-01-29 Online:2017-01-25 Published:2017-01-22

摘要/Abstract

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。

关键词: 黏粒红土, 磷, 吸附性能, 污染水体

Abstract:

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 isothermal adsorption. Results show that all the 8 types of natural clay laterites were more or less able to adsorb phosphorus in water, but they varied in performance 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 curves of the natural clay laterites in terms of R² value, which indicates that the adsorption was in the form of inhomogeneous multi-molecular-layer adsorption. In wastewater with the initial phosphorus concentration reaching 200 mg·L^-1, the natural lay laterites might adsorb as much as 2.38 mg·g^-1 phosphorus. Roasting or baking significantly enhanced the soils' phosphate adsorption capacity. Spiking natural minerals did not have much effect on phosphorus adsorption capacity of the soils, but could effectively 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.

Key words: clay laterite, phosphate, adsorption capability, polluted water

中图分类号:

X52
P579

韩承辉, 李胜生, 何斐, 干方群, 唐荣, 秦品珠, 杭小帅. 天然及处理黏粒红土对水体磷的吸附性能比较[J]. 生态与农村环境学报, 2017, 33(1): 91-96.

HAN Cheng-hui, LI Sheng-sheng, HE Fei, GAN Fang-qun, TANG Rong, QIN Pin-zhu, HANG Xiao-shuai. Comparative Analysis of Natural and Treated Clay Laterites in Phosphate Adsorption Capacity in Water[J]. Journal of Ecology and Rural Environment, 2017, 33(1): 91-96.

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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

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