Dataset Information

Potential of rice straw biochar, sulfur and ryegrass (Lolium perenne L.) in remediating soil contaminated with nickel through irrigation with untreated wastewater.

ABSTRACT:

Background

Untreated wastewater carries substantial amount of heavy metals and causes potential ecological risks to the environment, food quality, soil health and sustainable agriculture.

Methodology

In order to reduce the incidence of nickel (Ni²⁺) contamination in soils, two separate experiments (incubation and greenhouse) were conducted to investigate the potentials of rice straw biochar and elemental sulfur in remediating Ni²⁺ polluted soil due to the irrigation with wastewater. Five incubation periods (1, 7, 14, 28 and 56 days), three biochar doses (0, 10 and 20 g kg^-1 of soil) and two doses of sulfur (0 and 5 g kg^-1 of soil) were used in the incubation experiment then the Ni²⁺ was extracted from the soil and analyzed, while ryegrass seeds Lolium perenne L. (Poales: Poaceae) and the same doses of biochar and sulfur were used in the greenhouse experiment then the plants Ni²⁺-uptake was determined.

Results

The results of the incubation experiment revealed a dose-dependent reduction of DTPA-extractable Ni²⁺ in soils treated with biochar. Increasing the biochar dose from 0 g kg^-1 (control) to 10 or 20 g kg^-1 (treatments) decreased the DTPA-extractable Ni²⁺ from the soil by 24.6% and 39.4%, respectively. The application of sulfur increased the Ni²⁺-uptake by ryegrass plant which was used as hyper-accumulator of heavy metals in the green house experiment. However, the biochar decreased the Ni²⁺-uptake by the plant therefore it can be used as animal feed.

Conclusions

These results indicate that the biochar and sulfur could be applied separately to remediate the Ni²⁺-contaminated soils either through adsorbing the Ni²⁺ by biochar or increasing the Ni²⁺ availability by sulfur to be easily uptaken by the hyper-accumulator plant, and hence promote a sustainable agriculture.

SUBMITTER: Hashem IA

PROVIDER: S-EPMC7295020 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Publications

Potential of rice straw biochar, sulfur and ryegrass (<i>Lolium perenne</i> L.) in remediating soil contaminated with nickel through irrigation with untreated wastewater.

Hashem Inas A IA Abbas Aonalah Y AY Abd El-Hamed Abo El-Nasr H AEH Salem Haythum M S HMS El-Hosseiny Omr E M OEM Abdel-Salam Mohamed A MA Saleem Muhammad Hamzah MH Zhou Wenbing W Hu Ronggui R

PeerJ 20200612

<h4>Background</h4>Untreated wastewater carries substantial amount of heavy metals and causes potential ecological risks to the environment, food quality, soil health and sustainable agriculture.<h4>Methodology</h4>In order to reduce the incidence of nickel (Ni<sup>2+</sup>) contamination in soils, two separate experiments (incubation and greenhouse) were conducted to investigate the potentials of rice straw biochar and elemental sulfur in remediating Ni<sup>2+</sup> polluted soil due to the irr ...[more]

PMID: 32566397

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