Efficiency of lime, biochar, Fe containing biochar and composite amendments for Cd and Pb immobilization in a co-contaminated alluvial soil

被引：144

作者：

Hamid, Yasir ^{[1
]}

Tang, Lin ^{[1
]}

Hussain, Bilal ^{[1
]}

Usman, Muhammad ^{[2
]}

Gurajala, Hanumanth Kumar ^{[1
]}

Rashid, Muhammad Saqib ^{[3
]}

He, Zhenli ^{[4
]}

Yang, Xiaoe ^{[1
]}

机构：

[1] Zhejiang Univ, Coll Environm & Resources Sci, MOE, Key Lab Environm Remediat & Ecosyst Hlth, Hangzhou 310058, Peoples R China

[2] Sultan Qaboos Univ, Ctr Environm Studies & Res, PEIE Res Chair Dev Ind Estates & Free Zones, Al Khoud 123, Oman

[3] Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Peoples R China

[4] Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, Ft Pierce, FL 34945 USA

来源：

ENVIRONMENTAL POLLUTION | 2020年 / 257卷

基金：

中国国家自然科学基金;

关键词：

Metals immobilization; Composite amendments; FTIR; SEM-EDS; Speciation; Alluvial soil; RICE ORYZA-SATIVA; BRASSICA-CHINENSIS L; PADDY SOIL; CADMIUM AVAILABILITY; INORGANIC AMENDMENTS; WATER SPINACH; HEAVY-METALS; ACCUMULATION; ZN; BIOAVAILABILITY;

D O I：

10.1016/j.envpol.2019.113609

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Present study reports the laboratory and field scale application of different organic and inorganic amendments to immobilize cadmium (Cd) and lead (Pb) in a co-contaminated alluvial paddy soil. For that purpose, lime, biochar, Fe-biochar and two composite amendments (CA) composed of biochar, lime, sepiolite and zeolite (CA1: composite amendment 1) and manure, lime and sepiolite (CA2: composite amendment 2) were firstly tested in an incubation experiment to ameliorate Cd and Pb co-contaminated alluvial soil. It was observed that liming and CA2 elevated the soil pH and reduced DTPA extractable Cd and Pb in the incubated soil leading to higher metal immobilization. Therefore, efficiency of lime and CA2 was further investigated in field conditions with mid rice as the test crop to evaluate field scale immobilization and precise application rate for the tested soil type. DTPA and CaCl2 extractable Cd (46 and 51%) and Pb (68 and 70%) in field soil were decreased with applied treatments. Speciation of Cd and Pb also promoted conversion of metal exchangeable contents to less-available forms. Activated functional groups on amendments' surface (-OH bonding, C-O and C=O, -O-H, Si-O-Si, carboxylic and ester groups) sequestered metals by precipitation, adsorption, ion exchange or electro static attributes. Application of lime at 2400 kg/acre (T4) and CA2 at 1200 kg/acre was more effective in reducing rice shoot and grains metal contents. Moreover, obtained results in terms of pH, extractable content, speciation and yield, and microanalysis of amendments highlights the remarkable efficiency of lime and composite amendment to sorb Cd and Pb providing the key evidence of these amendments for metals immobilization and environmental remediation. Considering these results, lime and CA2 are potential amendments for co-contaminated rice field especially in context of alluvial soil. (C) 2019 Elsevier Ltd. All rights reserved.

引用

页数：12

共 62 条

[1] Effects of biochar on uptake, acquisition and translocation of silver nanoparticles in rice (Oryza sativa L.) in relation to growth, photosynthetic traits and nutrients displacement [J].