Phytoremediation yeMetal-Yakasvibiswa Ivhu Kushandisa Organic Amendments

Activated carbon ine carbonaceous zvinhu zvakatorwa kubva mumarasha. Activated carbon inogadzirwa ne pyrolysis ye organic zvinhu zvechirimwa. Zvinhu izvi zvinosanganisira marasha, makokonati mateko nehuni,nzimbe bagasse,soya beansuye muchidimbu (Dias et al., 2007; Paraskeva et al., 2008). Pamwero wakaganhurirwa,manyowa emhukaanoshandiswawo kugadzira activated carbon. Kushandiswa kwekabhoni yakabatiswa kwakajairika kubvisa simbi kubva mumvura yakaraswa, asi kushandiswa kwayo kwesimbi immobilization hakuwanzo muvhu rakasvibiswa (Gerçel naGerçel, 2007; Lima naMarshall, 2005b). Mupfudze wehuku wakatorwa activated kabhoni yaive neyakanakisa simbi yekusunga simba (Lima naMarshall, 2005a). Activated kabhoni inowanzoshandiswa kugadzirisa zvinosvibisa muvhu nemvura nekuda kwechimiro cheporous, nzvimbo yakakura yepamusoro uye yakakwirira adsorption kugona (Üçer et al., 2006). Activated carbon inobvisa simbi (Ni, Cu, Fe, Co, Cr) kubva mumhinduro kuburikidza nekunaya sesimbi hydroxide, adsorption pane activated carbon (Lyubchik et al., 2004). Almond husk inotorwa AC zvinobudirira yakabvisa Ni kubva mumarara emvura ine uye isina H₂SO₄kurapwa (Hasar, 2003).

Munguva pfupi yapfuura, biochar yakashandiswa sechigadziriso chevhu nekuda kwekubatsira kwayo paivhu rakasiyana remuviri nemakemikari zvimiro (Beesley et al., 2010). Biochar ine zvemukati zvakanyanyisa (kusvika 90%) zvinoenderana nechinhu chevabereki (Chan naXu, 2009). Kuwedzerwa kwebiochar kunovandudza kushambadza kweyakanyungudika organic kabhoni,ivhu pH, inoderedza simbi mune leachates uye inowedzera macro nutrients (Novak et al., 2009; Pietikäinen et al., 2000). Kuramba kwenguva refu kwebiochar muvhu kunoderedza kuiswa kwesimbi kuburikidza nekudzokorora kushandiswa kwezvimwe zvigadziriso (Lehmann naJoseph, 2009). Beesley et al. (2010) yakagumisa kuti biochar yakaderedza mvura inonyungudika Cd neZn muvhu nekuda kwekuwedzera kwe organic carbon uye pH. Activated carbon lowered metal concentration (Ni, Cu, Mn, Zn) munhungirwa dzezvirimwa zvechibage zvakarimwa muivhu rakasvibiswa zvichienzaniswa nevhu risina kugadziriswa (Sabir et al., 2013). Biochar yakadzikira yakakwira yakanyungudika Cd neZn muvhu rakasvibiswa (Beesley naMarmiroli, 2011). Vakagumisa kuti sorption inzira yakakosha yekuchengetedza simbi nevhu. Biochar yakadzikira kusungwa kweCd neZn kusvika ku300- uye 45-yakapetwa kuderera muhuwandu hwavo hweleachate, zvichiteerana (Beesley naMarmiroli, 2011).