Heavy Metals Phytoremidiation Potential of Napier Grass Cultivated on Tannery Sludge in Bangladesh

Abstract

Phytoremediation is a cost effective and eco-friendly method for cleanup of contaminated soil. This study focused on the assessment of phytoremediation potential of Napier grass (Pennisetum purpureum) and Indian mastered (Brassica juncea) yielding in tannery sludge. Initial characterization of tannery sludge showed a high concentration of chromium, lead, copper and zinc which were 6845.5±50.2, 73±2.5, 93±1.5 and 29±2.5 mg/kg, respectively. Both seeds of these plants were sown on tannery sludge kept in baskets and harvested after 8 and 12 weeks of plantation. Analysis indicated that both Napier grass and Indian mustard accumulated heavy metals in the order of Cr>Zn>Cu>Pb at different parts of these plants. Transfer factor (TF) for both plants were greater than 1 for Cu, Zn, Pb though it was less than 1 for Cr. Indian mustard accumulated highest concentration of Cr, Cu, and Pb whereas Napier grass showed highest Zn uptake and good Cr and Cu accumulation capacity. The uptake rate of Cr increased in Napier grass with the increase of plant age. Moreover, Napier grass is one of the rapid yielding tropical grasses and can retain for a longer period than Indian mustard for that attribute, it may accumulate more heavy metals than Indian mustard within its life span. Both of these plants can be used for remediating heavy metals from contaminated tannery sludge.
 Journal of Engineering Science 12(1), 2021, 35-41

Effective removal of chromium from contaminated water using horizontal subsurface flow constructed wetland with Napier grass (Pennisetum purpureum)

“…Chromium is one of the prominent heavy metals found in tannery wastewater, but its accumulation in environment must be limited to avoid its negative impacts to the ecosystem. Chromium hexavalent Cr(VI)) is the most observed form of chromium found in industrial waste (Juel et al, 2018). Economical and environmentally friendly wastewater treatment can be done through phytoremediation using plants.…”

“…Economical and environmentally friendly wastewater treatment can be done through phytoremediation using plants. Napier grass (Pennisetum purpureum) is a hyperaccumulator plant that has high tolerance to heavy metal by accumulate heavy metal in its tissues as micronutrients through a process of phytoextraction (Juel et al, 2018). Napier grass is a popular phytoremediation plant due to its high productivity, easy to grow, and has high endurance in non-ideal cultivation conditions (Mohammed et al, 2015).…”

“…Napier grass is a popular phytoremediation plant due to its high productivity, easy to grow, and has high endurance in non-ideal cultivation conditions (Mohammed et al, 2015). Through phytoremediation, hyperaccumulator plants can absorb, bind, and stabilise toxic elements in plant biomass (Juel et al, 2018).…”

The biochar-improved growth-characteristics of corn (Zea mays L.) in a 22-years old heavy-metal contaminated tropical soil

“…The above problem must be solved. A number of physical, chemical, and biological methods had been recently offered [16,[25][26][27][28][29][30][31][32][33][34][35][36][37]. Among the promising methods were the use of organic matters particularly biochar [25,27,31,[38][39][40][41][42].…”

Metal Extractability Changes in Soils Under Thorny Amaranth

“…The soil exchangeable Cu and Zn was measured by employing 1 N NH4OAc pH 7.0 and the soil available Cu and Zn by 1 N HNO3 (A. K. Salam, A. F. Pakpahan, et al, 2021). Knowledge related to the shifting in the various forms of heavy metals in soils is of more importance in the midst of heavy metal contamination and pollution all over the world (Adejoh, 2016;Aksu, 2015;Aprile & De Bellis, 2020;Arif et al, 2016;Arshad et al, 2015;Asati et al, 2016;Ayari et al, 2010;Chibuike & Obiora, 2014;Fang et al, 2016;Febriansyah et al, 2021;Gaza & Kugara, 2018;Jamal et al, 2013;Jankowski et al, 2019;Juel et al, 2018;Khodijah et al, 2019;Kočevar Glavač et al, 2017;Nachana'a Timothy, 2019;A. K. Salam, A. F. Pakpahan, et al, 2021;Sun et al, 2019;Wang & Zhang, 2018).…”