TY - JOUR
T1 - Organic soil additives for the remediation of cadmium contaminated soils and their impact on the soil-plant system
T2 - A review
AU - Hamid, Yasir
AU - Tang, Lin
AU - Hussain, Bilal
AU - Usman, Muhammad
AU - Lin, Qiang
AU - Rashid, Muhammad Saqib
AU - He, Zhenli
AU - Yang, Xiaoe
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2020/3/10
Y1 - 2020/3/10
N2 - Immobilization is among the most-suitable strategies to remediate cadmium (Cd) contaminated sites. Organic additives (OAs) have emerged as highly efficient and environment-friendly immobilizers to eradicate Cd contamination in a wide range of environments. This review article is intended to critically illustrate the role of different OAs in Cd immobilization and to highlight the key findings in this context. Owing to the unique structural features (high surface area, cation exchange capacity (CEC), presence of many functional groups), OAs have shown strong capability to remediate Cd polluted soils by adsorption, electrostatic interaction, complexation and precipitation. Research data is compiled about the efficiency of different OAs (bio-waste, biochar, activated carbon, composts, manure, and plant residues) applied alone or in combination with other amendments in stabilization and renovation of contaminated sites. In addition to their role in remediation, OAs are widely advocated for being classical sources of essential plant nutrients and as agents to improve the soil health and quality which has also been focused in this review. OAs may contain considerable amounts of metals and therefore it becomes essential to assess their final contribution. Elimination of Cd contamination is essential to attenuate the contaminant effect and to produce the safe food. Therefore, deployment of environment-friendly remediation strategies (alone or in combination with other suitable technologies) should be adopted especially at early stages of contamination.
AB - Immobilization is among the most-suitable strategies to remediate cadmium (Cd) contaminated sites. Organic additives (OAs) have emerged as highly efficient and environment-friendly immobilizers to eradicate Cd contamination in a wide range of environments. This review article is intended to critically illustrate the role of different OAs in Cd immobilization and to highlight the key findings in this context. Owing to the unique structural features (high surface area, cation exchange capacity (CEC), presence of many functional groups), OAs have shown strong capability to remediate Cd polluted soils by adsorption, electrostatic interaction, complexation and precipitation. Research data is compiled about the efficiency of different OAs (bio-waste, biochar, activated carbon, composts, manure, and plant residues) applied alone or in combination with other amendments in stabilization and renovation of contaminated sites. In addition to their role in remediation, OAs are widely advocated for being classical sources of essential plant nutrients and as agents to improve the soil health and quality which has also been focused in this review. OAs may contain considerable amounts of metals and therefore it becomes essential to assess their final contribution. Elimination of Cd contamination is essential to attenuate the contaminant effect and to produce the safe food. Therefore, deployment of environment-friendly remediation strategies (alone or in combination with other suitable technologies) should be adopted especially at early stages of contamination.
KW - Animal waste
KW - Biochar
KW - Metal uptake
KW - Precipitation
KW - Soil amelioration
KW - Stabilization
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UR - http://www.scopus.com/inward/citedby.url?scp=85076835666&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2019.136121
DO - 10.1016/j.scitotenv.2019.136121
M3 - Review article
C2 - 31865074
AN - SCOPUS:85076835666
SN - 0048-9697
VL - 707
JO - Science of the Total Environment
JF - Science of the Total Environment
M1 - 136121
ER -