Effects of Surface-Modified Nano-Scale Carbon Black on Cu and Zn Fractionations in Contaminated Soil

• Published in: International journal of phytoremediation Vol. 16; no. 1; pp. 86 - 94
• Main Authors: Cheng, Jie-min, Liu, Yu-zhen, Wang, Han-wei
• Format: Journal Article
• Language: English
• Published: United States Taylor & Francis Group 01.01.2014; Taylor & Francis Ltd
• Subjects: Biodegradation, Environmental; Biomass; carbon; Carbon black; carbonates; Contamination; Copper; Copper - analysis; Copper - metabolism; Correlation analysis; Cu and Zn fractionations; Distillation; Grasses; greenhouses; Lolium - drug effects; Lolium - growth & development; Lolium - metabolism; Lolium multiflorum; Nanomaterials; Nanoparticles - chemistry; Nanostructure; Plant Roots - drug effects; Plant Roots - growth & development; Plant Roots - metabolism; Plant Shoots - drug effects; Plant Shoots - growth & development; Plant Shoots - metabolism; polluted soils; remediation; seedlings; Seedlings - drug effects; Seedlings - growth & development; Seedlings - metabolism; shoots; Soil (material); Soil - chemistry; Soil contamination; Soil Pollutants - analysis; Soil Pollutants - metabolism; soil pollution; soil, ryegrass; Soot - pharmacology; surface-modified nano-scale black carbon; urea; Zinc; Zinc - analysis; Zinc - metabolism
• ISSN: 1549-7879; 1522-6514; 1549-7879
• DOI: 10.1080/15226514.2012.759530

Cu contamination soil (547 mg kg–¹) was mixed separately with the surface-modified nano-scale carbon black (MCB) and placed in the ratios (w/w) of 0, 1%, 3%, and 5% in pots, together with 0.33 g KH₂PO₄and 0.35 g urea/pot. Each pot contained 20 ryegrass seedlings (Lolium multiflorum). Greenhouse cultivation experiments were conducted to examine the effect of the MCB on Cu and Zn fractionations in soil, accumulation in shoot and growth of ryegrass. The results showed that the biomass of ryegrass shoot and root increased with the increasing of MCB adding amount (p < 0.05). The Cu and Zn accumulation in ryegrass shoot and the concentrations of DTPA extractable Cu and Zn in soil were significantly decreased with the increasing of MCB adding amount (p < 0.05). The metal contents of exchangeable and bound to carbonates (EC-Cu or EC-Zn) in the treatments with MCB were generally lower than those without MCB, and decreased with the increasing of MCB adding amount (p < 0.05). There was a positive linear correlation between the Cu and Zn accumulation in ryegrass shoot and the EC-Cu and EC-Zn in soil. The present results indicated the MCB could be applied for the remediation the soils polluted by Cu and Zn.