Aided phytostabilisation of As- and Cu-contaminated soils using white lupin and combined iron and organic amendments

Combined Effect of Ferrous Ion and Biochar on Cadmium and Arsenic Accumulation in Rice

“…The Fe(III) ions were precipitated as Fe(III) hydroxide when BC was amended. The iron-bearing mineral was formed and bonded arsenate and arsenite, which may play a significant role in As immobilization of Fe(II) in our study [24,25].…”

“…Combining Fe-base materials and biochar to amend Cd and As co-contaminated soil have been reported, such as Fe(II) combination with compost, as a promising approach to deal with metals co-existing in high concentrations in soil [24,25]. However, in the paddy soils system, soil functions and services should be improved while considering the mitigation of metal toxicity.…”

Effects of amendments on the bioavailability, transformation and accumulation of heavy metals by pakchoi cabbage in a multi-element contaminated soil

“…Increasing soil pH and organic matter, which is benecial for heavy metal retention. 3,9,12,26 With the increase in the soil pH, available forms of heavy metals are transformed into hydroxide precipitation, which combines with carbonate, thus reducing the mobility and biological toxicity effect of the heavy metals in the soil. 6,27 The most signicant factor affecting the mobility of Pb and As in the soil is the increase in the soil pH value caused by the biochar.…”

“…Mining, fertilization and sewage irrigation lead to the accumulation of heavy metals in agricultural soil, which makes China one of the most widely and severely polluted countries in the world with the heavy metals. [1][2][3] In China, more than 36 million hectares of farmland are polluted by numerous heavy metals, 1 of which more than 10 million hectares are polluted by cadmium (Cd). 4 In the past few decades, more than 100 tons of Cd has been accumulated into the soil through sewage irrigation, resulting in severe Cd pollution in China.…”

“…Globally, the use of organic amendments to minimize the heavy metal mobility and bioavailability in contaminated soils has increased rapidly. 3,[10][11][12] Compared with other soil remediation agents, compost, biochar and humic acid have their own advantages. Biochar can persist in the soil for hundreds or even thousands of years.…”