A pretreated green biosorbent based on Neem leaves biomass for the removal of lead from wastewater

被引：29

作者：

Zafar, Muhammad Nadeem ^{[1
,2
]}

Parveen, Azra ^{[2
]}

Nadeem, Raziya ^{[2
]}

机构：

[1] Univ Gujrat, Dept Chem, Gujrat, Pakistan

[2] Univ Agr Faisalabad, Dept Chem & Biochem, Faisalabad, Pakistan

来源：

DESALINATION AND WATER TREATMENT | 2013年 / 51卷 / 22-24期

关键词：

Azadirachta indica; Biosorption; Langmuir; Freundlich; Lead; Pretreatments; AQUEOUS-SOLUTIONS; HEAVY-METALS; PB II; BIOSORPTION; ADSORPTION; IONS; SORPTION; KINETICS; SLUDGE; PB(II);

D O I：

10.1080/19443994.2012.752765

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In the present study, Azadirachta indica (Neem) leaves biomass (a green biosorbent) was pretreated chemically and physically for possible application in the removal of lead from wastewater. Neem leaves biomass was pretreated chemically with the following chemicals HgCl2, CH3COOH, CH3CHO, and Oxalic acid and heating, autoclaving, ultrasonic bath, and boiling were used for physical pretreatment. Among all the pretreatments, boiling, acetic acid, and autoclaving pretreatments were proven to be effective at pH 5. Percentage removal of lead was 93.48% (boiling) > 91.85% (acetic acid) > 86.68% (autoclave) > 82.48% (control) and the maximum adsorption capacity (q) was 91.34mgg(-1) (boiling) > 89.75mgg(-1) (acetic acid) > 84.70mgg(-1) (autoclave) > 80.6mgg(-1) (control) after 24h. Langmuir and Freundlich isotherms were used to represent the equilibrium relationship for different initial lead concentrations in order to understand the adsorption process. The Langmuir isotherm model was found to be useful to explain sorption mechanism. Sorption system followed second-order kinetic model, which indicates that the rate-controlling step is chemisorption.

引用

页码：4459 / 4466

页数：8

共 44 条

[1] Biosorption of heavy metal ions from aqueous solutions by activated sludge [J].

Al-Qodah, Z. .

DESALINATION, 2006, 196 (1-3) :164-176

[2]

[Anonymous], 1990, BIOSORPTION HEAVY ME

[3]

[Anonymous], 1992, NEEM TREE SOLV GLOB

[4] The use of Neem biomass for the biosorption of zinc from aqueous solutions [J].

Arshad, Mamoona ;

Zafar, Muhammad Nadeem ;

Younis, Sadaf ;

Nadeem, Raziya .

JOURNAL OF HAZARDOUS MATERIALS, 2008, 157 (2-3) :534-540

[5] NONCONVENTIONAL INSECTICIDAL EFFECTS OF PESTICIDES AVAILABLE FROM THE NEEM TREE, AZADIRACHTA-INDICA [J].

ASCHER, KRS .

ARCHIVES OF INSECT BIOCHEMISTRY AND PHYSIOLOGY, 1993, 22 (3-4) :433-449

[6] Cadmium removal from aqueous solutions by chitin: kinetic and equilibrium studies [J].

Benguella, B ;

Benaissa, H .

WATER RESEARCH, 2002, 36 (10) :2463-2474

[7] Azadirachta indica leaf powder as a biosorbent for Ni(II) in aqueous medium [J].

Bhattacharyya, Krishna G. ;

Sarma, Jyotirekha ;

Sarma, Arunima .

JOURNAL OF HAZARDOUS MATERIALS, 2009, 165 (1-3) :271-278

[8] Removal of Zn(II) ions from aqueous solution using Moringa oleifera Lam. (horseradish tree) biomass [J].

Bhatti, Haq Nawaz ;

Mumtaz, Beenish ;

Hanif, Muhammad Asif ;

Nadeem, Raziya .

PROCESS BIOCHEMISTRY, 2007, 42 (04) :547-553

[9] CHEMICAL FRACTIONATION OF CELL-WALLS OF MYCELIAL AND YEAST-LIKE FORMS OF MUCOR-ROUXII - COMPARATIVE-STUDY OF POLYSACCHARIDE AND GLYCOPROTEIN COMPONENTS [J].

DOW, JM ;

RUBERY, PH .

JOURNAL OF GENERAL MICROBIOLOGY, 1977, 99 (MAR) :29-41

[10] Removal of hexavalent chromium with a lignocellulosic substrate extracted from wheat bran [J].

Dupont, L ;

Guillon, E .

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 2003, 37 (18) :4235-4241

← 1 2 3 4 5 →