Open AccessEffect of biochar on the lead mobility in Haplic Chernozem
Author(s) -
Marina Burachevskaya,
Tatiana Minkina,
Inna Zamulina,
А. Г. Федоренко,
V. P. Kalinichenko,
Ilia Lobzenko,
Svetlana Sushkova
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/578/1/012012
Subject(s) - biochar , chernozem , environmental chemistry , environmental remediation , sorbent , contamination , chemistry , soil contamination , pollution , metal , environmental science , soil water , soil science , adsorption , pyrolysis , ecology , organic chemistry , biology
The determination of mobile Pb compounds in soil is the most important environmental task, due to their sorbtion by plants and migration to other adjacent mediums. The biochar is widely known as an effective for contaminated soil remediation. The aim of the research was to study the effect of biochar remediation on the Pb mobility in soil under model contamination conditions. Haplic Chernozem was artificially contaminated with Pb nitrates at rates of 5 and 10 maximum permissible concentrations (32 mg/kg). Biochar was added in doses of 2.5% and 5% of the soil mass. Loosely bound compounds include exchangeable, complex, and specifically sorbed metal. The largest increase of metal exchangeable forms was observed at a pollution dose of 320 mg/kg (up to 16%). When carbon sorbent was introduced noticeable changes in the content of loosely bound forms occurred. Pb exchangeable forms decreased by 3-10%, complex forms - by 4-13%, specifically sorbed forms- by 4-12%. The highest efficiency of sorbents has been demonstrated by biochar at a dose of 2.5% in the soil contaminated with 160 mg/kg of Pb and at a dose of 5% under contamination of 320 mg/kg of metal.