Ecotoxicity, phytotoxicity and extractability of heavy metals from different stabilised sewage sludges

被引：125

作者：

Fuentes, Ana ^{[1
]}

Llorens, Mercedes ^{[1
]}

Saez, M. Jose ^{[1
]}

Aguilar, Isabel ^{[1
]}

Perez-Marin, Ana Belen ^{[1
]}

Ortuno, Juan F. ^{[1
]}

Meseguer, Victor F. ^{[1
]}

机构：

[1] Univ Murcia, Dept Chem Engn, E-30071 Murcia, Spain

来源：

ENVIRONMENTAL POLLUTION | 2006年 / 143卷 / 02期

关键词：

sewage sludge; heavy metals; DTPA-extractable metals; phytotoxicity assay; ecotoxicity assay;

D O I：

10.1016/j.envpol.2005.11.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The presence of heavy metals in the sludges produced in wastewater treatment plants restricts their use for agricultural purposes. This study compares different types of sludges (aerobic, anaerobic, unstabilised and sludge from a waste stabilisation pond) in order to assess the extractability of heavy metals using simple extraction, water and DTPA. The stabilisation treatment undergone by the sludges influenced the heavy metals extractability. The least mineralised sludges (unstabilised and aerobic) showed higher metal extractability. The sewage sludges were subjected to chemical characterisation and toxicity testing (ecotoxicity and phytiotoxicity assays) in absence of substrate, to provide a preliminary assessment of their suitability for land application. The ecotoxicity assays confirmed that no sludge constituted a hazardous waste. The sludge extracts had significant adverse effect on the germination index (GI) of barley (Hordeum vulgare L.) and cress (Lepidium sativum L.), a fact which indicates that some characteristics affected root growth, (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：355 / 360

页数：6

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