CAJ | 학술논문

为了探究生物炭对铅污染土壤的修复作用，将玉米秸秆炭（CS）、花生壳炭（PS）和银杉木炭（SF）分别以1％，3％，5％的比例加入铅污染土壤进行淹水培养，在5，15，30和75 d时采样检测铅形态及土壤性质的变化．结果表明：加入生物炭（CS，PS，SF）培养后污染土壤 pH 值较对照分别上升0．43～1．32，0．45～1．01，0．33～0．72个单位值，有机质含量分别增加56．84％～277．89％，14．74％～92．63％，35．79％～128．42％，且都表现为随生物炭施用量的增加而增大．随着培养时间的增长，铅形态分布趋于稳定，酸溶态和可还原态含量下降，残渣态含量上升．添加CS，PS，SF后土壤中酸溶态铅含量与对照相比分别下降19．20％，17．55％，6．66％（平均值）．生物炭添加后使铅的生物有效性显著降低，且其降低幅度随生物炭施用量的增加而增大．在生物炭添加量相同的情况下，玉米秸秆炭的修复效果最好．
위료탐구생물탄대연오염토양적수복작용，장옥미갈간탄（CS）、화생각탄（PS）화은삼목탄（SF）분별이1％，3％，5％적비례가입연오염토양진행엄수배양，재5，15，30화75 d시채양검측연형태급토양성질적변화．결과표명：가입생물탄（CS，PS，SF）배양후오염토양 pH 치교대조분별상승0．43～1．32，0．45～1．01，0．33～0．72개단위치，유궤질함량분별증가56．84％～277．89％，14．74％～92．63％，35．79％～128．42％，차도표현위수생물탄시용량적증가이증대．수착배양시간적증장，연형태분포추우은정，산용태화가환원태함량하강，잔사태함량상승．첨가CS，PS，SF후토양중산용태연함량여대조상비분별하강19．20％，17．55％，6．66％（평균치）．생물탄첨가후사연적생물유효성현저강저，차기강저폭도수생물탄시용량적증가이증대．재생물탄첨가량상동적정황하，옥미갈간탄적수복효과최호．
In order to explore repair capacity of biochar application on lead-contaminated soil,the corn straw carbon (CS),peanut shell carbon (PS)and silver fir charcoal (SF)were added in lead contaminated soil in the proportion of 1%,3%,5%,respectively.The samples were obtained after waterlogged incubation for 5 , 15,30 and 75 days and then analysed the changes of lead species distribution and soil properties.The results showed that application of biochar significantly increase the pH values and soil organic matter content.Compared with the treatment without biochar,the treatments of adding CS,PS,and SF after cultivation ,the pH values of contaminated soils increase 0.43~1.32,0.45 ~1.01,0.33 ~0.72 units,respectively,while organic matter increased 56.84%~277.89%,14.74% ~92.63%,and 35.79% ~128.42%,respectively.Lead species distribution tend to be stable along with the incubation time.Acid soluble form and reducible form contents of lead decrease,whereas residual form contents of lead increase.The acid soluble form contents of lead with the application of CS,PS,SF decrease by 19.20%,17.55%,6.66%,respectively (average).The application of biochar effectively decrease the bioavailability of lead, and its decreasing rate increase gradually as the application of biochar rate.With the same amount of biochar addition,the remediation effect of corn straw carbon is the best.