Effect on heavy metals concentration from vermiconversion of agro-waste mixed with landfill leachate

被引：26

作者：

Abu Bakar, Azizi ^{[1
,2
]}

Yee, Choy May ^{[1
]}

Mahmood, Noor Zalina ^{[1
,2
]}

Abdullah, Noorlidah ^{[1
,2
]}

机构：

[1] Univ Malaya, Inst Biol Sci, Fac Sci, Kuala Lumpur 50603, Malaysia

[2] Univ Malaya, Fac Sci, Mushroom Res Ctr, Kuala Lumpur 50603, Malaysia

来源：

WASTE MANAGEMENT | 2015年 / 38卷

关键词：

Heavy metal mass balance; Livestock excreta; Lumbricus rubellus; Pleurotus sajor-caju; Vermicompost; CD; PB; AVAILABILITY; EARTHWORMS; SLUDGE; SOILS;

D O I：

10.1016/j.wasman.2015.01.020

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Spent Pleurotus sajor-caju compost mixed with livestock excreta, i.e. cow dung or goat manure, was contaminated with landfill leachate and vermiremediated in 75 days. Results showed an extreme decrease of heavy metals, i.e. Cd, Cr and Pb up to 99.81% removal as effect of vermiconversion process employing epigeic earthworms i.e. Lumbricus rubellus. In addition, there were increments of Cu and Zn from 15.01% to 85.63%, which was expected as non-accumulative in L. rubellus and secreted out as contained in vermicompost. This phenomenon is due to dual effects of heavy metal excretion period and mineralisation. Nonetheless, the increments were 50-fold below the limit set by EU and USA compost limits and the Malaysian Recommended Site Screening Levels for Contaminated Land (SSLs). Moreover, the vermicompost C:N ratio range is 20.65-22.93 and it can be an advantageous tool to revitalise insalubrious soil by acting as soil stabiliser or conditioner. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：431 / 435

页数：5

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