Removal of chromium and nickel from aqueous solution in constructed wetland: Mass balance, adsorption-desorption and FTIR study

被引：96

作者：

Yadav, Asheesh Kumar ^{[1
]}

Kumar, Naresh ^{[2
]}

Sreekrishnan, T. R. ^{[3
]}

Satya, Santosh ^{[4
]}

Bishnoi, Narsi R. ^{[2
,4
]}

机构：

[1] CSIR, Inst Minerals & Mat Technol, Environm & Sustainabil Dept, Bhubaneswar 751013, Orissa, India

[2] Guru Jambheswar Univ Sci & Technol, Dept Environm Sci & Engn, Hisar 125001, Haryana, India

[3] Indian Inst Technol Delhi, Dept Biochem Engn & Biotechnol, New Delhi 1110016, India

[4] Indian Inst Technol Delhi, Ctr Rural Dev & Technol, New Delhi 1110016, India

来源：

CHEMICAL ENGINEERING JOURNAL | 2010年 / 160卷 / 01期

关键词：

Constructed wetlands; Canna indica L; Fourier transform infrared analysis; Hydraulic retention time; Heavy metal removal; WASTE-WATER TREATMENT; METAL REMOVAL; FILTER MEDIA; LEAD; COPPER; ACCUMULATION; MACROPHYTES; EFFLUENT; SORPTION; CADMIUM;

D O I：

10.1016/j.cej.2010.03.019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The present study was conducted to investigate the chromium and nickel removal from aqueous solutions in constructed wetland microcosms using Canna indica Lin. species. Effects of different hydraulic retention times (HRTs), initial metal concentrations and depth of gravel beds on removal of chromium and nickel were studied. Maximum removal of chromium and nickel was found to be 98.3(+/- 10.32) and 96.2(+/- 1.52) %, respectively, at initial concentrations of 10 mg l(-1) and at an HRT of 48 h in 0.95 m gravel bed depth constructed wetland microcosms. The attempt was made to know the possible mechanism of metals removal and their mobility within the plant. In order to reuse the exhausted gravel, desorption possibilities were tested. Desorption of 35, 25 and 33% of chromium and 60,98 and 100% of nickel from gravel were achieved with 0.50 mM EDTA, 0.1 M HNO(3) and 0.1 M CaCl(2) solutions, respectively. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：122 / 128

页数：7

共 33 条

[1] Preliminary investigation of the potential of four tropical emergent macrophytes for treatment of pre-treated pulp and papermill wastewater in Kenya [J].